Category: Water

Interrogating land and water use change in the Colombian Andes

Posted on by janet.crompton

Socio-ecological tensions, farming and habitat conservation in Guantiva-La Rusia

Highlighting the Cabot Institute’s commitment to growing the evidence base for water-based decision making, Dr Maria Paula Escobar-Tello (Co-Investigator) and Dr Susan Conlon (Post Doctoral Research Assistant) introduce the social science component of an exciting three-year project called PARAGUAS, an interdisciplinary collaboration between UK and Colombian researchers to investigate how plants and people influence the water storage capacity of the Colombian Páramos…

In June 2018, the Natural Environment Research Council (NERC) and the Arts and Humanities Research Council (AHRC) jointly awarded funding to five UK projects under the Newton-Caldas funded Colombia-Bio programme. The Colombian Department of Science, Technology and Innovation (Colciencias) subsequently awarded funding to 24 smaller Colombian projects under the same programme. PARAGUAS – How do the Páramos store water? The role of plants and people” is one of the five UK-funded projects.

Páramos are crucial for the livelihoods and wellbeing of millions of people (Photo © María Paula Escobar-Tello, University of Bristol)

Crucial source of land and water

The páramos are tropical mountain wetlands found between 3000m and 4500m of elevation in the Andes. Known for their extreme water storage and regulation capacity, they generate exceptionally high and sustained water supplies to farmland, settlements and cities downstream. They are also an important repository of biodiversity. Páramos have been historically inhabited; first by pre-Colombian indigenous communities and nowadays by heterogeneous campesino communities who depend on them as a primary source of water crucial for their livelihoods and wellbeing.  In the last few decades, several political, economic and armed conflict dynamics have pushed the agricultural frontier to increasingly higher elevations. The combined pressure of land use and climate change has already degraded many páramo areas and their potential demise has generated widespread concern across all levels of governance in Colombia, as well as within the NGO sector and research community.

Growing tensions in water conservation

A diversity of actors – government, NGO, community organisations, farmers – are interacting in the conservation of water in the Guantiva-La Rusia páramo, each with their own knowledges and understandings of the water storage function of the páramo, as well as contrasting views on who should benefit from this function and on the political economy of conservation efforts. Our team began to explore two sets of dynamics where these contrasting views were manifest during a pre-fieldwork campaign in January 2019.

In the first dynamic, local populations experience national and regional conservation efforts to address land and water degradation through the delimitation of the páramos – a controversial ongoing land management process whereby government authorities seek to map the areas they believe should be conserved to protect the páramos. One approach in these new land management policies and plans is to extend national park land under protection through land acquisition, which overlaps with complex pre-existing land ownership arrangements. In addition, the Ley de Páramos 233, 2018 (Páramos Law 233) prohibits farmers from carrying out productive activities on formerly-used land, which is now defined as páramos by authorities, and tasks local authorities with negotiating with farmers and supporting them in finding alternative economic activities.  While this ban may sound ecologically necessary, multiple actors question the processes that have defined the páramo borderline for several reasons including its implications on farmers’ livelihoods, identities and ecosystem knowledges.

In the second dynamic, water conservation policies and plans prioritise the channelling of water from the páramos to the aqueducts that supply the populations downstream through land purchases that lead to changes in land use and the piping of springs and streams. These processes are equally contested and have led to community-level forms of organisation, representation and resistance; as well as to multi-scale and multi-issue conflicts between different campesino sectors; between local, regional and national-level political and environmental authorities; and between different discourses about environmentalism and modernisation.

Our project goals

As the social science component of PARAGUAS, we want to explore these different sets of socio-cultural and political tensions. We will do this by investigating how and why land and water use has changed in the Guantiva-La Rusia páramo and how this is related to public policy decisions that have shaped (or not) how local páramo inhabitants, particularly crop and livestock farmers, interact currently with the páramo through their day-to-day farming practices. Our aim for this part is to expose lesser heard voices in the conservation debate and listen to how local inhabitants articulate their understanding of the water regulation function of the páramo.

We are busy preparing for the first round of fieldwork in May 2019 and are designing our methodology of interviews, focus groups and digital storytelling techniques in close collaboration with our colleagues at Loughborough University. Watch this space for further updates!

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The PARAGUAS project is supported by the Newton-Caldas Fund and funded by the NERC and AHRC [grant number NE/R017654/1].  PARAGUAS is led by Principal Investigator Dr France Gerard (Centre for Ecology & Hydrology) and Co-Investigators Dr Ed Rowe (Centre  for Ecology & Hydrology), Mauricio Diazgranados (The Royal Botanic Gardens, Kew), David Large (University of Nottingham), Wouter Buytaert (Imperial College London), Maria Paula Escobar-Tello (University of Bristol), Dominic Moran (University of Edinburgh), Michael Wilson (Loughborough University) and supported by the research group ‘Biología para la conservación’ of the Universidad Pedagógica Tecnologica de Colombia (UPTC) – Dr Liliana Rosero-Lasprilla and Dr Adriana Janneth Espinosa Ramirez, the Instituto de Investigación de Recursos Biológicos Alexander von Humboldt (IAvH) – Dr Susana Rodríguez-Buriticá, The Universidad Nacional de Colombia (UN) – Prof Conrado de Jesus Tobon Marin and the Institute of Hydrology, Meteorology and Environmental Studies (IDEAM) – Dr Liz Johanna Diaz.
NERC Programme: Exploring and Understanding Colombian Bio Resources
Newton-Caldas Fund
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This blog is written by Cabot Institute members Dr Maria Paula Escobar-Tello nd Dr Susan Conlon from the School of Veterinary Sciences at the University of Bristol.

Dr Maria Paula Escobar-Tello

 

World Water Day: How can research and technology reduce water use in agriculture?

Posted on by janet.crompton
Record breaking temperatures in 2018 led to drought in many European countries. Image credit Wikimedia Domain Mimikry11.

World Water Day draws attention to the global water crisis and addresses why so many people are being left behind when it comes to having access to safe water. The UN estimates that globally 80% of people who have to use unsafe and unprotected water sources live in rural areas. This can leave households, schools, workplaces and farms struggling to survive. On farms water is vital for the production of food and is used in a huge range of processes, including irrigation and watering livestock. In this blogpost I will lightly review the current issues around water in agriculture and highlight some exciting research projects that may offer potential solutions.

What is the water crisis?

The UN Sustainable Development Goal 6 is to ensure that all people have access to sustainable, safe water by 2030. Unfortunately, we’re a long way off achieving this goal as a recent report from UNICEF/WHO estimates that there are currently 2.1 billion people living without access to safe water in their homes and workplaces. Another report estimates that 71% of the global population experiences severe water scarcity during at least one month of the year. In recent years we have seen water risks increase, with severe droughts in Africa, China, Europe, India and the US. In sub-Saharan Africa, the number of record breaking dry months increased by 50% from 1980 to 2013. Unfortunately droughts, floods and rising sea levels are predicted to continue and become more unpredictable under climate change scenario models and as the global population continues to grow, there will be increasing demands on water supplies. Increases in water scarcity are likely to lead to increases in political and economic instability, conflict and migration.

Why is water important to agriculture?

In agriculture, water is vital for growing crops and sustaining livestock. Farmers use water to irrigate, apply pesticides and fertilizer and protect from heat and frost. This heavy reliance means that when water supplies run out, farmers are unable to effectively maintain their crops and livestock, leading to food insecurity. Drought stress can result in yield losses of 64% in rice, 50% in chickpea, 18 – 32% in potato. Drought has particularly devastating effects in tropical and sub-tropical regions, where climate change is predicted to have the biggest impact.

The amount of water it takes to produce food and drink products is pretty shocking. Beef production in particular is associated with high levels of water usage. It is estimated that the global average water footprint of a 150g beef burger is 2350 litres; despite producing just 5% of the world’s food calories, beef production is reported to create 40% of the water scarcity burden. Although there are big variations in the environmental impacts of beef farming, with grassland fed, rotational systems being less intensive than grain fed herds on deforested land.

Where does water used for agriculture come from?

The water that is used in agriculture comes from a range of sources, including surface and ground water supplies, rivers and streams, open canals, ponds, reservoirs and municipal systems. Globally, the FAO estimates that agriculture accounts for 70% of freshwater withdrawals, which is predominately used for irrigation. In many areas the high level of groundwater used for irrigation is unsustainable, leading to depletion. For instance, the OECD estimates that groundwater supplies 60% of India’s agricultural water needs but groundwater sources are suffering from depletion and pollution in 60% of states. A big problem is that irrigation is often highly inefficient; in the US the FAO estimates that the amount of irrigated water that is actually used by plants is only 56%. Large amounts of energy are also needed to withdraw, treat and supply agricultural water, leading to significant greenhouse gas (GHG) emissions.

What happens to agricultural water after use?

As well as depleting freshwater supplies, agriculture can also pollute them, with runoff containing large quantities of nutrients, antibiotics, growth hormones and other chemicals. This in turn has big affects on human health through contamination of surface and ground water with heavy metals, nitrate and pathogens and in the environment; it can cause algal blooms, dead zones and acidification of waterways. Combined these issues mean that better management of water in agriculture has huge potential for improving sustainability, climate resilience and food security, whilst reducing emissions and pollution.

What are the potential solutions?

Thankfully there are many innovative projects that are working to improve issues around water in agriculture. Below are a few examples that I find particularly promising.

How can technology help?

To reduce water wastage on farms, agri-technology is being developed whereby multiple wireless sensors detect soil moisture and evapotranspiration. The sensors feed this information to a cloud-based system that automatically determines precisely how much water to use in different parts of the field, leading to increased yields and saving water. Farmers can get water management recommendations via a smartphone app and the information automatically instructs irrigation systems. At a larger scale, these data systems can feed into a regional crop water demand model to inform decision-making on agricultural policies and management practices, and to provide early warnings of potential flood and drought risks.

Sensor that detects leaf moisture levels. Image credit: Wikimedia Domain Massimiliano Lincetto

Irrigation systems are also being made more efficient; one study found that simply changing from surface sprinklers to drip irrigation that applies water directly to plant roots through low-pressure piping, reduced non-beneficial water wastage by 76%, while maintaining yield production. In arid areas these systems can be used for a technique called partial root drying, whereby water is supplied to alternate side of the roots, the water stressed side then sends signals to close stomatal pores which reduces water lost through evapotranspiration.

These efficient precision irrigation systems are becoming cheaper and easier for farmers to use. However in tropical and sub-tropical areas, the technology can be difficult to apply smallholder farming, where there is often insufficient Internet connectivity, expertise, capital investment, and supply of energy and water. Several precision agriculture projects are working to overcome these challenges to promote efficient use of irrigation water, including in the semi-arid Pavagada region of India, the Gash Delta region of Sudan and São Paulo, Brazil. In Nepal, a Water Resources Information System has been established that collects data to inform river management, whereas in Bangladesh hundreds of solar-fuelled irrigation pumps have been installed that simultaneously reduce reliance on fossil fuels and reduce GHG emissions.

Hydroponic systems whereby plants are grown in water containing nutrients are becoming increasingly popular; the global market for hydroponics is projected to reach £325 million by 2020. Compared with land-based agriculture, hydroponics uses less land; causes less pollution and soil erosion and so these systems are less vulnerable to climate change. Critically they also reduce water use; once the initial water requirements are met, the closed-system recycles water and there is less evapotranspiration. The adoption of these systems is predicted to occur predominately in water stressed regions of the Middle East and Africa and in highly urbanised countries such as Israel, Japan and the Netherlands.

How can researching traditional approaches help?

It’s not just about agri-tech; there are relatively simple, traditional ways to tackle water issues in agriculture. To protect against drought, farmers can harvest and store rainwater during heavy downpours by building ponds and storage reservoirs. To reduce water wastage, farmers can improve the ability of soil to absorb and hold water through reducing tillage and using rotational livestock grazing, compost, mulch and cover crops. Wetlands, grasslands and riparian buffers can be managed to protect against floods, prevent waterlogging of crops and improve water quality. Increasingly these traditional methods valued and research is being done to optimise them. For instance a novel forage grass hybrid has been developed that is more resilient to water stress and can reduce runoff by 43 – 51% compared with conventional grass cultivars.

A small-scale farmer in Kenya who is harvest rainwater. Image credit: Wikimedia Domain Timothy Mburu.

How can crop and livestock breeding help?

In the past, crop and livestock varieties have been selected for high productivity. However, these varieties are often severely affected by changes in climate and extreme weather events such as drought and require high levels of water and nutrients. To improve resilience and sustainability, breeders increasingly need to also select for stress responses and resource use efficiency. In crops, drought resilience and water use efficiency is influenced by many traits, including root and shoot architecture, stomatal density and thickness of the waxy cuticle that covers leaves and reduces evapotranspiration. The complexity of these traits makes breeding crops for drought resilience challenging, as many different groups of genes need to be selected for. To deal with this, the International Rice Research Institute’s Green Super Rice project has been crossing high-yielding parent lines with hundreds of diverse varieties to produce new high-yielding varieties that require less water, fertilisers and pesticides. These varieties are now being delivered to farmers in countries across Asia and Africa. Similarly, climate change resilience is also vital for current and future livestock farming. Projects run by Professor Eileen Wall (SRUC) have identified novel traits and genes associated with drought and heat resilience in UK and African dairy cattle, which can be incorporated into breeding programmes.

What are the incentives?

Although these projects might sound promising, without incentives to drive their uptake it may take a long time for real impacts to come to fruition. Unfortunately, in some countries such as India there can be a lack of monetary incentives that would effectively enable farmers to take up new water management technology and practices. In the EU, the Common Agricultural Policy (CAP) has allocated funds to support farmers in complying with ‘greening rules’ that improve sustainability, preserve ecosystems and efficient use of natural resources, including water. Farmers across the EU receive CAP payments for environmentally friendly farming practices, such as crop diversification and maintaining permanent grassland.

In many European countries, there is increasing consumer demand for sustainably farmed food products. This is driving large and small manufacturers to seek out sustainable suppliers and so farmers are incentivised to improve the sustainability of their farming practices so that they can be certified.  For instance the Sustainable Farming Assurance Programme requires farmers to follow good agricultural and environmental protection practices, including sustainable water use. In the coming years, more food products are likely to have water foot print labels that provide the consumer with information on the amount of water used during production and processing. This places considerable power in the hands of the consumer and large manufacturers are responding. For instance, by 2020 Kellogg has pledged to buy ten priority ingredients (corn, wheat, rice, potatoes, sugar and cocoa) only from farms that prioritise protecting water supplies, as well as using fertilizers safely, reducing emissions, and improving soil health. And Pepsico has created sustainable agriculture sourcing programmes that aim to help farmers improve water and soil resource management, protect water supplies, minimise emissions and improve soil health.

What can we do?

There are ways to take responsibility for reducing our own water footprints, including reducing meat and animal production consumption, reducing food wastage and buying sustainably farmed products. Finally, we can all get involved with communicating and promoting the importance of water in agriculture so that more people are aware of the issues. Head to the World Water Day website to find out about resources and events that may be happening near you.

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This blog is written by Caboteer Dr Katie Tomlinson, who recently completed her PhD at the University of Bristol on cassava brown streak disease. Katie is now an Innovation and Skills manager at the BBSRC and is running the Sustainable Agriculture Research and Innovation Club. Views presented in this blog are her own. You can follow Katie on Twitter: @KatieTomlinson4.

Dr Katie Tomlinson

 

Belo Monte: there is nothing green or sustainable about these mega-dams

Posted on by janet.crompton

 

File 20180807 191041 1xhv2ft.png?ixlib=rb 1.1
Google Maps

There are few dams in the world that capture the imagination as much as Belo Monte, built on the “Big Bend” of the Xingu river in the Brazilian Amazon. Its construction has involved an army of 25,000 workers working round the clock since 2011 to excavate over 240m cubic metres of soil and rock, pour three million cubic metres of concrete, and divert 80% of the river’s flow through 24 turbines.

 

The dam is located about 200km before the 1,640km Xingu meets the Amazon. kmusser, CC BY-SA

Costing R$30 billion (£5.8 billion), Belo Monte is important not only for the scale of its construction but also the scope of opposition to it. The project was first proposed in the 1970s, and ever since then, local indigenous communities, civil society and even global celebrities have engaged in numerous acts of direct and indirect action against it.

While previous incarnations had been cancelled, Belo Monte is now in the final stages of construction and already provides 11,233 megawatts of energy to 60m Brazilians across the country. When complete, it will be the largest hydroelectric power plant in the Amazon and the fourth largest in the world.

Indigenous protests against Belo Monte at the UN’s sustainable development conference in Rio, 2012. Fernando Bizerra Jr / EPA

A ‘sustainable’ project?

The dam is to be operated by the Norte Energia consortium (formed of a number of state electrical utilities) and is heavily funded by the Brazilian state development bank, BNDES. The project’s supporters, including the governments of the Partido dos Trabalhadores (Workers’ Party) that held office between 2003 and 2011, have justified its construction on environmental grounds. They describe Belo Monte as a “sustainable” project, linking it to wider policies of climate change mitigation and a transition away from fossil fuels. The assertions of the sustainability of hydropower are not only seen in Brazil but can be found across the globe – with large dams presented as part of wider sustainable development agendas.

With hydropower representing 16.4% of total global installed energy capacity, hydroelectric dams are a significant part of efforts to reduce carbon emissions. More than 2,000 such projects are currently funded via the Clean Development Mechanism of the 1997 Kyoto Protocol – second only to wind power by number of individual projects.

While this provides mega-dams with an environmental seal of approval, it overlooks their numerous impacts. As a result, dams funded by the CDM are contested across the globe, with popular opposition movements highlighting the impacts of these projects and challenging their asserted sustainability.

Beautiful hill, to beautiful monster

Those standing against Belo Monte have highlighted its social and environmental impacts. An influx of 100,000 construction and service workers has transformed the nearby city of Altamira, for instance.

Hundreds of workers – unable to find employment – took to sleeping on the streets. Drug traffickers also moved in and crime and violence soared in the city. The murder rate in Altamira increased by 147% during the years of Belo Monte construction, with it becoming the deadliest city on earth in 2015.

In 2013, police raided a building near the construction site to find 15 women, held against their will and forced into sex work. Researchers later found that the peak hours of visits to their building – and others – coincided with the payday of those working on Belo Monte. In light of this social trauma, opposition actors gave the project a new moniker: Belo Monstro, meaning “Beautiful Monster”.

The construction of Belo Monte is further linked to increasing patterns of deforestation in the region. In 2011, deforestation in Brazil was highest in the area around Belo Monte, with the dam not only deforesting the immediate area but stimulating further encroachment.

In building roads to carry both people and equipment, the project has opened up the wider area of rainforest to encroachment and illegal deforestation. Greenpeace has linked illegal deforestation in indigenous reserves – more than 200km away – to the construction of the project, with the wood later sold to those building the dam.

Brazil’s past success in reversing deforestation rates became a key part of the country’s environmental movement. Yet recently deforestation has increased once again, leading to widespread international criticism. With increasing awareness of the problem, the links between hydropower and the loss of the Amazon rainforest challenge the continued viability of Belo Monte and similar projects.

Big dams, big problems

While the Clean Development Mechanism focuses on the reduction of carbon emissions, it overlooks other greenhouse gases emitted by hydropower. Large dams effectively emit significant quantities of methane for instance, released by the decomposition of plants and trees below the reservoir’s surface. While methane does not stay in the atmosphere for as long as carbon dioxide (only persisting for up to 12 years), its warming potential is far higher.

Belo Monte has been linked to these methane emissions by numerous opposition actors. Further research has found that the vegetation rotting in the reservoirs of dams across the globe may emit a million tonnes of greenhouse gases per year. As a result, it is claimed that these projects are – in fact – making a net contribution to climate change.

Far from providing a sustainable, renewable energy solution in a climate-changed world, Belo Monte is instead cast as exacerbating the problem that it is meant to solve.

The ConversationBelo Monte is just one of many dams across the globe that have been justified – and funded – as sustainable pursuits. Yet, this conflates the ends with the means. Hydroelectricity may appear relatively “clean” but the process in which a mega-dam is built is far from it. The environmental credentials of these projects remain contested, with Belo Monte providing just one example of how the sustainability label may finally be slipping.

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This blog is written by Cabot Institute member Ed Atkins, Senior Teaching Associate, School of Geographical Sciences, University of Bristol.  This article was originally published on The Conversation. Read the original article.

Ed Atkins

The muddy debate: Is the Severn Estuary biologically productive?

Posted on by janet.crompton
Severn Bridge by Philippa Long

Traditionally, the Severn Estuary has been mistaken for an expansive, featureless landscape, dominated by fast-flowing muddy waters that prevent any pelagic biological activity. Although the latter could be true in terms of phytoplankton development, new research has shed light on the vital role that the benthic algal system has on controlling nutrient dynamics in the estuary.

Estuaries form at the margins between the land and the sea. The complex movement and mixing of freshwater and seawater governed by the tide, along with the trapping and recycling of continentally supplied nutrients and sediment, makes estuaries some of the most ecologically viable ecosystems in the world, in line with the biological productivity of coral reefs and tropical rainforests.

The Severn, the largest of 133 estuaries in the UK, has a mosaic distribution of intertidal mudflats, saltmarshes and wetlands, making it a unique habitat for a wide range of species. Alongside nationally scarce plant species, important wildfowl, wader populations and migratory European birds inhabit and refuel in the biologically-rich banks of the estuary. The estuarine waters are also home to over 100 fish species that use the estuary as a nursery, supporting many of the UK’s commercial fish stocks. With such a wide socio-ecological and economic importance, it is clear why the Severn was designated a Special Area of Conservation in 2009.

However, it’s less obvious as to why it has been over two decades since there have been systematic sampling studies in the Severn. Reviews have come and gone during this time, widely associated with renewable energy projects such as the Severn Barrage, but have often repeated findings from the 1990s. Furthermore, any commercially driven studies and their findings are often not disclosed to researchers or the public. This has left, in many aspects, knowledge of the Severn and its current ecosystem condition in a state of limbo. One aspect that’s often overlooked in many hydrological systems and is often overshadowed by carbon, nitrogen and phosphorus, is the element silicon, which may be one of the most important nutrients in the Severn’s environment.

Sand Bay by Holly Welsby

Why is silicon important?

Dissolved silicon is an important nutrient in aquatic environments, and is essential to siliceous organisms, for example, photosynthetic diatoms, which use dissolved silicon to form their shells (or frustules) made from biogenic silica. Diatoms are broadly categorised as ‘centric’ (round), usually occupying the surface oceans, and ‘pennate’ (long and thin), inhabiting coastal and seafloor environments, including sea ice, and intertidal mudflats such as those in the Severn Estuary.

Despite their small size, diatoms are an important group in supporting most food webs, and due to their abundance, contribute close to half of all surface ocean productivity! Diatoms are a key factor in affecting climate change due to this high productivity, as they remove the greenhouse gas carbon dioxide out of the atmosphere and export the organic carbon from the surface ocean to the seafloor when they die. Dissolved silicon and biogenic silica have been widely used to study marine silicon cycles but the impact that diatoms may have on estuarine cycles, and the potential influence on river silicon inputs to the ocean, has only recently come to light.

Silicon cycling in the Severn Estuary: new research

After the receding of the tide, large intertidal mudflats form along the shores of the Severn Estuary, which has the second largest tidal range in the world! These nutrient-rich intertidal mudflats are inhabited by pennate diatoms that live in microbial mats, called biofilms, on the mudflat surface. These biofilms, which are visible to the naked eye (the golden-brown shimmer that can be observed on the mudflats at low tide), are low in biodiversity but high in diatom abundance. Biofilms are an important food source to many mud-dwelling creatures, such as estuarine ragworm and laver spire snails, and migratory visitors such as the whimbrel and ringed plover. These ‘sticky’ mats also contribute to sediment stabilization, through the production of an organic rich network around sediment grains, and control nutrient fluxes to the overlying water.

Biofilm on the intertidal mudflats of the Severn by Holly Welsby

Compared to the well-studied carbon, nitrogen and phosphorus cycles, the importance of silicon in the Severn Estuary is less well understood. New research that has been carried out at the University of Bristol has aimed to tackle this gap, with an in-depth, seasonal study of silicon cycling along the Severn river-estuary-marine continuum. Each season in 2016, the surface and bottom waters of the Severn were sampled aboard Cardiff University’s research vessel.

It was found that the strong tidal forces and seasonal river flow fluctuations controlled dissolved silicon and other associated nutrients. In line with previous studies, the high mud water content – referred to as turbidity – limited water column primary productivity by blocking out light. This meant that there was minimal biogenic silica production in the water column itself. Instead, biogenic silica depended on the suspended particulate matter, and displayed seasonal cycles associated with benthic biogenic silica production by the diatom biofilms on the mudflats. In other words, the suspended sediment in the Severn not only originated from the rivers discharging into the estuary, but also from the erosion of the intertidal mudflats. This erosion of the mudflats in this high energy system, led to the suspension of the diatom biofilms, and so increased the biogenic silica concentrations in the water column.

This research has shown that since the 1990s reports, diatom biofilm biomass (i.e. their presence) has increased on the mudflats. These diatoms were also efficient at photosynthesis, resulting in a high potential to cycle silicon. These biofilms break up and reform rapidly between tides meaning that a large amount of silica is shuttled from the mudflats to the water column every day. This benthic biogenic silica export, which is transported further compared to dissolved silicon, could dissolve and replenish the Celtic Sea, with the dissolved silicon ready to be used by plankton that supports our commercial fish stocks.

Severn River in winter by Tim Gregory

Looking ahead

The Severn Estuary – in all its natural wonders – is a valuable resource in terms of renewable energy, tourism and business. Many of us also call it home. But what does the future hold for these diatom biofilms on the mudflats of the Severn Estuary? In many ways, their prospects are low. With extreme weather events, erosion and coastal squeezing causing a loss to our mudflat and saltmarsh habitats, influx of microplastics and associated toxins, alongside proposals for large construction projects that may alter sediment/nutrient loadings and deposition patterns, the future of these biofilms hangs is in the balance. But based on recent findings, these diatoms are tolerant to the mudflats harsh environmental conditions, which suggests they have the capability to adapt to these adverse conditions. Diatoms are a miraculous species, and their benefits to the estuary is not fully recognised.

We are beginning to understand that there is a limit to the degree that we can modify our environment, but if we could only assign an economic value to this biologically productive system, perhaps the benthic diatoms future on the Severn Estuary mudflats could be aided.

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This blog has been written by Cabot Institute member Holly Welsby, from the School of Earth Sciences at the University of Bristol.

Water City Bristol!

Posted on by janet.crompton
Foot selfie at secret swimming spot

If you don’t fix things in words, they might float away. So, briefly, a skeletal accounting —

  • 3 open-water swims
  • 2 workshops in maritime writing
  • 1 public lecture
  • 1 trip up the canal locks to Saltford
  • 2 days at #MT2018 (Marine Transgressions Conference)
  • 2 keynotes
  • ~ 12 panels
  • 1 Blue Humanities roundtable
  • 2 receptions
  • [a poetry reading that I missed]
  • And many half-garbled memories, starting in the middle —
The Llandoger Trow, where Daniel Defoe met Alexander Selkirk

Toxicity, the Ocean, and Urban Space (Wednesday)

I was trying some new things for this public lecture, knowing that the audience would swirl together academics with non-academics, be mostly composed of city-dwellers, and further include mostly those with a particular interest in the sea. Unpicking the knots of writing and thinking I’ve been chasing down in the wake of Oceanic New York, my talk splashed through some recent watery adventures, included images of Thanos the purple God of demonic Malthusianism, strayed into verse in three of my own poems, and — maybe? — crossed wild water to make landfall with hopeful gestures toward Ocean citizenship. How can our Cities and our bodies prepare themselves for and live with rising waters? I’d like to speak that as a not-only tragic story.

Public lecture at the University of Bristol

The Henleaze Swimming Club (Monday)

On Monday afternoon, jet-lagged and still-missing my baggage from the overnight flight in via Dublin, I bought a replacement suit & goggles from the hotel & Uber’d up to Henleaze, a former quarry that’s been a private swimming club since 1919. This gorgeous, narrow, fresh-watered lake now overflows with people, half with swimmers and half fisherfolk. What better anti-jet lag tonic can be?

Underwater Bristol (Tuesday)

Building on the perpetual inspiration of underwaternewyork.com, I hatched a plot with members of the U of Bristol English faculty to incubate some to-emerge-later responses to Bristol’s waterways. So many glorious things! A sailboat named Svendgar that I spotted a few days later for sale in the harbor. Brown mudflats. The kayaks that were paddled around the Bay by the Inuits kidnapped in Frobisher’s Second Voyage to Newfoundland in 1577. A football pitch next to a Cadbury Chocolate Factory that I’d seen earlier that morning while riding a canal boat up five locks to Saltford. Plastic. Breeding eels. What will they all become?

Brunel’s suspension bridge over the Avon

A secret monastic pool (Wednesday)

Having been promised a bit of true English wild swimming on the condition that I not mention the name or location of the waters in which I would plunge, I suppose I was a bit surprised to come around the corner of the quiet country lane to discover maybe sixty students lining the pool’s far bank, sunning themselves in post-exam freedom. The secluded pool, built “in the Middle Ages” to store fish for the Abbey of St. Augustine (founded 1140), now hosts lily pads, a gorgeous 15-foot tall purple rhododendron, supposedly a few tench, and — alas! — some horseflies that enjoyed landing on my bald head. It’s an excellent place for an afternoon’s swim. Thanks to my hosts for taking me there!

Bristol Harbour on the last night

Sea-themed creative writing workshop (Wednesday)

I was deeply impressed by the almost-dozen enthusiastic  Bristol undergrads who submitted maritime poetry and prose works for an post-term bonus workshop. I was joined also by Shakespearean Laurence Publicover and poet David Punter, and we spent a thrilling two hours wrestling with the joys and frustrations of writing with and into oceanic spaces. The student writing was gorgeous and wonderfully ambitious, from a narrative built from fragments of a diary from the S.S. Great Britain to a brilliantly post-Agatha Christie cruise montage, a boat-launching story, several quite lovely lyrics about blue spaces, and a hashing of Pip’s dream of drowning from Moby-Dick that spoke to my Melvillean core.

Clevedon Marine Lake (Fri)

Diving into Clevedon Marine Lake

Located as far upstream as big boats could travel the tidal Avon, Bristol today is water-filled but brackish rather than salt. Much of my time there was semi-marine, from the walks along the harbour to the floating bar the Marine Transgressions Conference decamped to after our final keynote. But though the Avon is tidal for a long distance and boasts (I am reliably assured by tide-guru Owain Jones from the Environmental Humanities department at Bath Spa) the second-highest tides in the world, there’s not a lot of open salt water in the city. I wanted to swim in the Bristol Channel (still known in Wales as the Severn Sea), so the morning of the conference’s last day I met swimographer Vanessa at an early hour that precluded other swimming companions, and we Uber’d out to the Clevedon Marine Lake. I’ve seldom or never seen a more starkly ideal swimscape. The pool is built, framed in by concrete and stone, but at high tide the swell tops the wall and fills the pool with ocean water. The tide was near the ebb when we arrived that morning, and over 100 yards of brown mudflat extended below the “lake,” reflecting the gray sky up toward us. The water was perfect — cool but not cold, salty but not bitter, manageable even though I’d forgotten my goggles in the hotel, and a generous 250m per lake-length. One of the few other swimmers who was also there on a grey misty morning was a man training for 70km in Lake Geneva. He churned in slow circles around the lake and planned to swim through dinner time. We had panels to rush back to in Bristol, but I was tempted just to keep swimming.

#MT2018 Marine Transgressions Conference (Thursday & Friday)

In front of Nancy Farmer tiles with Vanessa Daws at Clevedon

My visit to Bristol was fortuitously timed with an interdisciplinary conference on Marine Transgressions — a geologic term of art for moments in which the sea invades the land. Packed in to the last two days of my stay, the conference’s turbulent energy kept me going even when my own energy flagged. From Helen Rozwadowski’s amazing opening keynote on Jacques Cousteau and utopian fantasies of homo aquaticus in the 1950s and ’60s all the way through Tim Dee’s gorgeously lyrical evocation of the human and avian intertwinings of gulls and landfills, #MT2018 was an stirring mixture. I can’t do justice to all the great panels and papers that I heard over the two days, but I was struck by the variety of disciplinary perspectives — lots of poetics, history, and environmental humanities, but also marine law, policy, science, technological remediation, and other things. All these were joined together by a shared passion for the oceanic “blue” — though of course we all know, and we repeated as a kind of refrain over two days, that the ocean is also and meaningfully green, gray, purple, and many other colors — including gold, in the memorable image of the geochemist Kate Hendry describing the glimmer of microscopic diatoms on the salt flats of the Severn estuary at low tide.

Blue Humanities Round Table (Friday)

The best parts of a small conference come from listening to new things, and also from catching an extension of someone’s work over a beer at the floating bar after the day’s sessions. But in addition to many great discoveries, I’ve seldom had more fun at an academic presentation than I did chairing a Blue Humanities Round Table near the end of the second day. The amazing panel of disparate thinkers and makers included Owain Jones, whose hydrocitizenship project connects Bristol’s to its people and its past; Vanessa Daws, swimographer and immersive artist; Kate Hendry, a biogeochemist whose fields work takes her to both the Arctic and Antarctic ice fields; and my friend from the CT Shoreline Helen Rozwadowski, historian of science and founder of the Maritime Studies Program at UConn Avery Point. I started us out with a general question — “What can you do because of your focus on the sea that you could not do otherwise?” — and our conversation waterfalled down through several memorable twists and turns into a fantastic question period. With thanks to Alexandra Campbell and her twitter-agility, here’s a partial reconstruction of the ship we built as we sailed along:

  • The sea is not a metaphor (quoting Hester Blum) — except that sometimes it is, and sometimes its metaphors rub against and into the real salt water.
  • The sea is history (not-quite-remembering to quote Derek Walcott) — and given a few generations of blue humanities historical scholarship it should hopefully become more richly historicized.
  • The sea disorients and distorts, always and relentlessly, even as humans respond partially to that disorientation.
  • Is water alien? Does it come from outer space or from inside the earth’s core? Why might it matter? (in dialogue with Lindy Elkins-Tanton)
  • The sea’s lack of visibility redoubles its its moral challenge, informs the cultural history of its monstrous depths, and increases the force of its alien elements. (I rambled here about the “Creature from the Black Lagoon” poster art on the walls of Catch-22, the fish & chips place where I ate my first Bristol meal.)
  • Does the weakness of human eyesight underwater attenuate our moral connection with sea creatures? (A Levinas-ian question, though we didn’t mention his name)
  • Can science “illuminate” (Kate’s word) the sea in ways that increase its ethical claims on human subjects?
  • What are the politics of the interdisciplinary ocean? How can the sea speak to social justice, especially remembering the twin horrors of the slave trade and transoceanic capitalism (which two things might actually be parts of the same thing)?
  • Can the sea be a space of hope? (Last question, I think? We said yes. But I’m not sure that we’re sure.)

 

Selfie with mermaid and Vanessa Daws in Clevedon

“Under the sea everything is moral”

The hardest and most evocative phrase of the conference came when Helen quoted Cousteau or one of his fellow sea-utopians in her opening keynote. What might it mean for “everything” to be “moral” beneath the waves? “It’s all subtle and submarine,” says Walcott, thinking about Atlantic slavery and Caribbean beauty. Owain quite rightly objected that the underwater industriousness for which Cousteau was a booster has fouled our waters. The panel speculated together about the morality that emerges from the shared vulnerability of terrestrial human bodies in deep waters. I thought about, but did not share, a terrifying vision of drowning and struggle from Macbeth —

Doubtful it stood / As two spent swimmers that do cling together / And choke their art (1.2)

There’s another way, it occurs to me now as my big green metal bird arcs past the southern tip of Greenland, in which the undersea might be “moral.” It’s not that all undersea activities are permitted or approved, but that the questions we face — what we talk about when we talk about oceans — become starkly and painfully ethical. As mer-scholars, academic selkies, blue humanists, we swim into hard questions about disorientation, about buoyancy, about living-with alien lives. We face questions of social justice and tragic history, of oceanic dislocation and ongoing violence. Moral urgencies splash into marine lakes in the West Country and haunt overcrowded refugee boats in the Eastern Med.

The sea supports and threatens human life. What moral dilemmas fix us from the cold glaze of a fish’s eyes?

Floating bar

Thanks to all who were there this week, and in particular to my hosts at the University of Bristol, the Perspectives on the Sea cluster run by Laurence Publicover, the Brigstow and Cabot Institutes, and all the people who made Marine Transgressions possible! I’m looking forward to my next visit to Bristol already.

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This blog has been written by Professor Steve Mentz, St John’s University, New York. The blog has been reposted with kind permission from Steve’s original blog.

Under her eye: Communicating climate change more effectively

Posted on by janet.crompton

My name is Adriana Suárez and I’m a 3rd year PhD Student at the School of Geographical Sciences. I am working on community based water management in rural areas in Chile, where I am from.

I came back from fieldwork two months ago and in a way, I am still getting used to being back in Bristol as it is easy to feel a bit lost when you are swimming in a sea of data.  It was an intense fieldwork experience as I spent five months in Chile doing interviews with different participants, collecting documents and texts, and doing participant observation. The method I am using is called Institutional Ethnography, a method of inquiry developed by feminist sociologist Dorothy Smith and which has not been used yet in natural resources management.

My aim is to learn from rural communities who are involved in water management as a way to explore a form of management that is different to the usual way in which water for human consumption and sanitation is provided in urban areas. For example, in most cities like Santiago and Bristol, water is provided by sanitary companies which capture, purify and deliver water to our households. They also collect waste water and treat it to then return it to rivers so it can be used again in other activities. Usually, sanitary companies are for profit corporations that make a profit out of this service.

However, the way drinking water is organised in rural Chile is very different as in these areas the State works in partnership with the community. In this model, the work is done with a social aim and not as a way to make a profit, as opposed to the work of sanitary companies involved in the provision of water to urban areas. On the one hand the State is in charge of investing in the construction and provision of the infrastructure needed to capture, accumulate and distribute water, such as water tanks and a network of water pipes that distribute water to each household. On the other hand, the community is responsible for managing the system. This work includes repairing any breakages, leaks and charging water tariffs to keep the system running.

Coming back from fieldwork is not an easy task and I felt like I had many questions and concerns I needed to discuss with others. I realised I also needed to engage with my data in as many ways as possible, and that meant not only in academic ways. This is why I have been looking for opportunities to engage in conversation with other PhD students as well as with people who are not doing research or are not involved in academia. The ‘Research without Borders’ festival has offered me an opportunity to do this in a non-academic way, and to think of ways of talking about my research I had not considered before.

I also committed to preparing a stall at a public engagement event in Colston Hall on the 9 May 2018, in which I would develop an activity about my research. Someone had suggested me to use a cut out of James Bond to exemplify the gendered patterns of water management in my research. However I wasn’t entirely convinced I could develop a meaningful activity with a real-size cardboard image of Daniel Craig.

So, as I was getting – or not – ready to present my project in an engaging and fun way, I received an email from the Cabot Institute inviting me to participate in the Under Her Eye fellowship program which involved participating in a conference taking place on 1 June 2018 in London. I quickly went on their website and did a bit of research and I soon realised this was an opportunity I could not miss! This conference is about communicating climate change effectively by encouraging collaboration between scientists and artists. Moreover, Margaret Atwood will be the ambassador of this conference! I applied immediately and was thrilled to hear I had been chosen to participate.

Scarborough. Image credit Adriana Suarez.

Last weekend we met in Scarborough with the Invisible Dust team, who are organising the conference and I met the rest of the participants who were from different universities across the country. It was an incredible experience and it opened my eyes to new ways of collaborations I had not considered before. It was an intense and productive weekend, dedicated to improve our presentation skills, to think about engaging different audiences, about communicating and about how to affect change. It was inspiring and thought provoking, and it was a sharing experience among people I had never seen before, but with whom I shared values, dreams and concerns with.

We were invited to think about an activity we would like to develop during the conference and we came up with an idea to involve the public in a sensory experience that would take them all the way to Chile, to explore how avocado production is competing with a rural community and their human right to access water. I had never thought I had a creative facet, but now I’m starting to think I might not know everything about myself yet, which is quite refreshing. The whole weekend in Scarborough was a discovery, an exploration of our own research and of ways in which to look at it from different angles, from creative approaches and involving others in reflecting about it too, which was an invaluable gift.

I did not realise how meaningful the connections made with the other young women participating in this fellowship would turn out to be. We introduced ourselves with a nice ice-breaking activity in which we started drawing connections that would then help us develop conversations around topics that mattered to us such as climate change, gender, vegetarianism and curry. Our love for chocolate and coffee also came up, together with our concern about the risk of losing them as we found out from Sarah Mander’s presentation. Sarah works @TyndallManc and explained the ways in which the UK is working to meet the commitments it has taken to reduce carbon emissions and help combat climate change. She mentioned that if the global temperature rises to 4C we would be losing chocolate and coffee.

Later, we had Laura Harrington’s presentation which I thought was very personal and generous. She talked about her research in landscapes and her interests in geomorphology, especially in the peat bogs of Cumbria/Northumberland. She showed us a video with different takes on the landscape she was working on and I could feel I was there, almost a part of it.  She was doing art by recording sounds on a wet day, filming the dripping and melting of snow and the drenched soil which made me feel cold. It was interesting to see the amount of patience and endurance she had to have to be able to film these scenes for hours, waiting, looking and absorbing the landscape through all her senses. I was surprised she enjoyed being there as I thought I would have only been able to stay in those conditions for a little while, comforted by the idea of soon going back to a warm and dry place. She put sensors, cameras, and films under the ground to see how they became part of the landscape after some time there, being exposed to these harsh conditions. It felt intimate as she was telling us what went through her head and what she wanted to do with the equipment. I admired Laura’s conviction and the way in which she would not listen to scientists’ advice when telling her “there is nothing to see here”. These suggestions did not prevent her from going to Finland in winter time and experiencing the landscape for herself.

She praised procrastination, as it is a place where imagination and creativity can emerge, which made me think about how much I fear procrastinating, without really valuing the precious gifts that leisure time can offer.

After this intense afternoon, we went for a nice walk into the TEC Campus, a beautiful place where we would get our own room, and space to walk, to meet, a great Canteen and friendly staff who were all the time accommodating to our needs. On the Friday, we worked on different ideas, especially about what makes as curious and thoughts we wanted to develop. We had an interesting talk by Julie Doyle, professor of media and communications at Brighton University. We worked on a critical reflection on media types, and on examples of effective and ineffective ways of communicating climate change. We also discussed the gendered aspects of some media depictions, we saw ways in which irony was used to spark discussions and we talked about different art forms and exhibitions that can reach audience’s attention while entertaining them and also offering a hopeful message. We mentioned the importance of responsibility when communicating climate change impacts, especially when talking to younger generations, so that we avoid making people feel disempowered.

We then had a Skype workshop with Gayle Chong Kwan in which we talked about the changes people can make in food consumption, and how we can all relate to food, which was one of the things that came up in our first ice breaker exercise. This was a great workshop in which we became active participants in the preparation of the Microclimate Banquet taking place at the Conference in June.

Gayle showed us pictures from the late XIX century were ice was brought from Norway to London as customers demanded ice for food preservation, for making ice cream, and for medical use. She also showed pictures of cattle in jails, as a way for us to imagine how meat production and food supply was organised in the past. This was a great prompt for starting a conversation on the impacts we have on the environment by consuming fruits that are grown in faraway lands, or products that travel long distances to get to our tables, like the avocados from Chile.

After lunch, we had the valuable input of Sarah Cartwright who taught us several tips for communicating effectively and present our ideas with confidence. We learned about the importance of breathing, of concentrating in our body and grounding ourselves so that we can be assertive and authoritative. Many of us were impressed with the fact that the content of our presentations is only 7% of what counts to make an impact. The rest of attention is related to our body language, the way we speak, and the tone of our voices. We learned tips for warming our vocal cords, making eye contact and on what to do with our hands. It is surprising that we hardly ever get advice on how to communicate our research, which makes me think of the important challenges that academia faces when researchers try to connect with people located in other spheres of knowledge such as the arts. These so called “soft skills” are generally overlooked and we spent more time working on our content than on the way we deliver it and the impact we make.

After this we split into two groups and we developed in 15 minutes, a 5 minute presentation in which we would use these suggestions to structure our talk. We all received very valuable feedback on our presentation style and were able to see what we were doing well and what things we could improve.

That night we watched the short film ‘Pumzi’ by Kenyan filmmaker Wanuri Kahiu, a sci-fi short film that pushes us to think about alternative futures. We also watched/heard Sabrina Mahfouz’s potent poem on climate refugees ‘‘The Environmental Refugee Holding Centre (ERHC)’.

Under Her Eye group of fellows.

Towards the end of the weekend we worked on learning how to make our ideas happen by applying for funds, doing a proposal pitch and looking for funding sources. This was practical advice on how to concretise our ideas.This weekend has boosted my curiosity and my practice of reflecting on the what, why, how and why of climate change action and communication. Moreover I made 14 new friends who I will be working with in the next six weeks leading up to Under Her Eye. It has been inspiring and a luxury to take time off to explore and celebrate the role of women taking action on climate change, and I appreciate the opportunity to have been part of this experience.

This weekend was a gift, as I could dedicate three full days to pause, reflect, write and share ideas and dreams with like-minded women. This time, when experienced, becomes an avenue for exploring our own abilities but also for creating in collaboration with others possibilities for transformation and hope, which are essential when communicating and engaging audiences in climate change action.
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This blog was written by Cabot Institute member Adriana Suarez, who is a PhD Candidate in Environment, Energy and Resilience at the School of Geographical Sciences. She is exploring community based water management in rural Chile through Institutional Ethnography, a feminist method of inquiry into social relations.

Adriana Suarez

Twitter: Adri_H2o
Email: as15606@bristol.ac.uk

‘Under Her Eye’ is curated and produced by award-winning arts science organisation Invisible Dust and supported by the Wellcome Trust, Euston Town BID, Creative Scotland, Mooncup and Arts Council England.

Reliable and sustainable micro-hydropower in Nepal

Posted on by janet.crompton
Rolling hills of Baglung District

Despite massive potential to generate electricity through large scale hydropower, Nepal often faces power cuts and the national grid only reaches around 65% of the population. Much of the non-grid connected population live in rural, hilly and mountainous areas where grid extension is difficult and costly. Micro-hydropower plants (MHPs), which deliver up to 100kW of electrical power, extract water from rivers and use it to drive a generator before returning the water to the same river further downstream. These systems can provide electricity for lighting and productive end uses that can vastly improve people’s quality of life. Since the 1970s, micro-hydro turbines have been manufactured in Nepal. Now there are around 2,500 MHPs installed across Nepal.

When these systems break or run poorly it has an adverse effect on the quality of people’s lives. Through my research, I am hoping to find methods to improve the reliability and sustainability of MHPs in Nepal. The aim of this project was to see how well systems were maintained and interview the people who run, manage and rely on hydropower plants. I hoped that interviews would help me to understand some of the technical and social challenges that MHPs face.  Whilst in Nepal, I was working with a Nepali NGO called the People, Energy and Environment Development Association (PEEDA) who helped me to identify sites, arrange visits and conduct interviews.

A micro-hydropower plant

During my time in Nepal, Prem Karki (from PEEDA) and I visited a total of 17 sites in the neighbouring districts of Baglung and Gulmi. Prem and I spent 12 days in the field, making our way from one site to the next via bumpy jeep rides and on foot. Nepal’s hills make it suitable for hydropower but also make travelling complicated. Many of the roads we travelled on were unpaved and we saw lots of places where landslides had damaged roads during the monsoon. This showed us how difficult it is to move equipment and materials when plants are under construction. At each site, our visual assessment took us on some nerve jangling walks along canals that snaked around cliff edges to reach the intakes. Prem was responsible for interviewing the plant operator, management representative and consumer at each site so we could understand how plants were maintained, managed and their importance to beneficiaries. The local people were very helpful and interested by our work. We were often given free meals and sometimes even a place to stay!

A winding canal

I was able to collect a large amount of information which I am still processing digitally and mentally! In general, I found that micro-hydro sites are often impressive feats of engineering which can make a big impact on people’s lives by powering homes, businesses and services. In challenging environments where the only means of transportation is manpower, the hard work of local people has led to their construction. Several times, we crawled through hand chiselled caves made solely for a hydro project’s canal. The impact of the projects was clear to see. Every interview respondent said that connection to an MHP had made their life easier.

Furthermore, the micro-hydro projects are invaluable to communities as a whole; they power workplaces, shops, health posts and mobile phone masts. In the town of Burtibang, with a population of around 10,000, every home and business is powered by electricity from micro-hydro projects.

This dependence on micro-hydropower makes its reliability very important. I found the quality of maintenance very variable. Some sites were well cared for with an evident daily effort to keep the plant running as best as possible. Other plants had little evidence of regular maintenance and were showing signs of deterioration. Promisingly, I found that sites with formally trained operators tended to be better maintained than those without.

In terms of sustainability, there was a good standard of management. Energy meters allowed accurate measurement of electricity consumption so that consumers were charged according to their use. Consumers are typically given a short window in which to pay and fined for late payment. At most sites, managers said that there was sufficient money collected for the operation of the plant and maintenance costs.

To maintain reliability and sustainability, there are a range of technical and social issues that MHPs must overcome. There were common technical issues in design. Many turbines were leaking, and plant operators mentioned bearing replacement as one of the most common issues. We also saw a big variation in the quality of  installations particularly for the  civil works. It is disappointing that despite the massive effort expended in construction, some features are not fit for purpose. Socially, we found four sites where the original operator had moved abroad for work meaning the present operator had not been trained. Plant managers also commented on the increasing demand from consumers resulting in pressure on operators to deliver more power. These issues develop for social reasons but result in problems which can harm the reliability of the system.
A micro-hydropower turbine
In my further research, I intend to work closely with a turbine manufacturer during the design, manufacture and installation of a micro-hydro project. I hope to identify opportunities to implement greater quality control to prevent the occurrence of the technical issues mentioned. By working in collaboration with governmental and non-governmental organisations in Nepal, I would like to find innovative ways to ensure the longevity of MHPs. As Nepal develops, the role of micro-hydro will change but I believe it still has an important role to play in rural electrification.
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This blog is written by Cabot Institute member Joe Butchers, a PhD student from the Electrical Energy Management Group at the University of Bristol.

Joe Butchers

 

 

The Nikki Project: Designing a rainwater harvesting system for an African health centre

Posted on by janet.crompton

Last summer three Engineers Without Borders (EWB) members conducted a six week recce on water supply in Nikki, Benin, last summer. After building contacts with local engineers, schools and hospitals, sourcing handwritten archived data, and finding many interesting answers to our questions, we are now working hard on designs for a rainwater harvesting system and planning this summer’s work. This blog is about our project, why it’s important and how we’re going about it.

Main high street in Nikki, northern Benin.

The Nikki Project aims to address water supply problems in the small district of Nikki, Benin. A big layer of granite near to the ground surface means there is only a seasonal water table. This means the Benin government’s method of borehole water supply, which works for the rest of the country, does not work here. Citizens are given a few hours of water supply per day (at the best of times). This water is cut until 2 am and rarely lasts past 5 am; certainly not ideal for schools and hospitals that need water for treatment during the day. Instead, citizens turn to private boreholes, wells and at the worst times, an untreated lake outside the city.

Map showing Benin at the bottom of the image.

Engineers Without Borders Bristol are partnered with a Spanish charity, OAN International, who identified this problem two years ago and asked EWB Bristol to help tackle Nikki’s water supply issues. Last summer our aim was to build a partnership with a local service, who we trusted to maintain the system in our absence and who we thought would be a good working partner to trial our designs.

Back in the UK about 25 of us meet every week to work on this project. Our main task this year has been the design of a rainwater harvesting system for a small health clinic. This clinic was established by two male nurses, funded from the money they earned working for the Benin national health service. They run the clinic by working 12 hours shifts each, with dedication and fantastic vision. Like all health services in Benin the centre charges for their services, but unlike the hospitals makes no profit from the sale of medicines. The hygiene measures taken were extraordinary for Benin; to paraphrase a Spanish medic volunteer, this was ‘the first time [he] has seen a Benin child being told to wash their hands’. The clinic deals, amongst other things, with malaria and pregnancy: the two biggest causes of death in the area.

The health clinic that EWB are working with to provide a rainharvesting water supply.
The EWB Bristol team surveying the health centre site in Benin.

Our rainwater harvesting solution will consist of a large 90,000 litre storage tank, a water treatment system, and a small water tower to gravity feed the water into existing taps in the clinic. The tank will collect water during the rainy season and store it safely until the dry period when no water is available from the government supply.

This type of system has become very successful and widespread elsewhere in Sub-Saharan Africa, and if successful this type of system could be expanded to suit more clinics or schools in the region. We chose to work with this health centre because of the nurses’ incredible dedication to their cause; before we had finished explaining the concept, they had already started discussing how they would start saving up for it. While contributing to the materials is certainly something we are discussing as the cost of materials and labour is not high in Benin, a sense of ownership is key to the system being maintained properly and thus being a success.

An example of pipes not properly attached and fallen down in the wind leading to an abandoned RWH tank. This tank was built 2005. The current staff have no recollection of it ever functioning.

We are still exploring design options for our rainwater harvesting system:

  • Should the pump be manual or electric (practical in everyday or with a higher risk/cost of replacement)?
  • Should the water be chlorinated in the tank or after the tank or both? Is it worth the money if it will be chlorinated again anyway?
  • Would someone prefer a monthly job or a daily job in maintaining the water treatment system? If we use a Bernoulli chlorinator will it make chemical concentrations easier or more difficult to control? Possibly easier if they understand and potentially disastrous if they do not?
  • What construction materials are best? This needs to be considered with respect to practicality, local skill availability, durability and what is culturally accepted.
We are affiliated by Engineers Without Borders UK who are there for advice, provide pre-departure training for volunteers and offer insurance while out there. We have gratefully received £2,000 from the university Alumni Foundation and £11,000 from the Queen’s School of Engineering to support the project and the lab testing we’re planning before the trip this summer. We will be blogging and updating our website as the project progresses.
For more information about this project, photos, travel reports and journal entries can be found on our website: beninwater.my-free.website.
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This blog is written by Daniela Rossade, a 2nd year mechanical engineering student at the University of Bristol and is running this project as part of Engineers Without Borders Bristol.
Daniela Rossade
EWB Bristol is always looking for advice and people who have experience with rainwater harvesting and international development to learn from. We also value feedback on our ideas. If you are interested your help would be gratefully appreciated.  Please contact Daniela at ds14678@my.bristol.ac.uk.

Is benchmarking the best route to water efficiency in the UK’s irrigated agriculture?

Posted on by janet.crompton
Irrigation pump. Image credit Wikimedia Commons.

From August 2015 to January 2016, I was lucky enough to enjoy an ESRC-funded placement at the Environment Agency. Located within the Water Resources Team, my time here was spent writing a number of independent reports on behalf of the agency. This blog is a short personal reflection of one of these reports, which you can find here. All views within this work are my own and do not represent any views, plans or policies of the Environment Agency. 

Approximately 71% of UK land (17.4 million hectares) is used for agriculture – with 9.3 million hectares (70%) of land in England used for such operations. The benefits of this land use are well-known – providing close to 50% of the UK’s food consumption.  Irrigated agriculture forms an important fulcrum within this sector, as well as contributing extensively to the rural economy. In eastern England alone, it is estimated that 50,000 jobs depend upon irrigated agriculture – with the sector reported to contribute close to £3 billion annually to the region’s economy.
It is estimated that only 1-2% of the water abstracted from rivers and groundwater in England is consumed by irrigation. When compared to the figures from other nations, this use of water by agriculture is relatively low.  In the USA, agricultural operations account for approximately 80-90% of national consumptive water use. In Australia, water usage by irrigation over 2013/14 totalled 10,730 gigalitres (Gl) – 92% of the total agricultural water usage in that period (11,561 Gl).
However, the median prediction of nine forecasts of future demand in the UK’s agricultural sector has projected a 101% increase in demand between today and 2050. In this country, irrigation’s water usage is often concentrated during the driest periods and in the catchments where resources are at their most constrained. Agriculture uses the most water in the regions where water stress is most obvious: such as East Anglia. The result is that, in some dry summers, agricultural irrigation may become the largest abstractor of water in these vulnerable catchments.
With climate change creating a degree of uncertainty surrounding future water availability across the country, it has become a necessity for policy and research to explore which routes can provide the greatest efficiency gains for agricultural resilience. A 2015 survey by the National Farmers Union  found that many farmers lack confidence in securing long term access to water for production – with only a third of those surveyed feeling confident about water availability in five years’ time. In light of this decreasing availability, the need to reduce water demand within this sector has never been more apparent.
Evidence from research and the agricultural practice across the globe provides us with a number of possible routes. Improved on-farm management practice, the use of trickle irrigation, the use of treated wastewater for irrigation and the building of reservoirs point to a potential reduction in water usage.
Yet, something stands in the way of the implementation of these schemes and policies that support them: People. The adoption of new practices tends to be determined by a number of social factors – depending on the farm and the farmer. As farmers are the agents within this change, it is important to understand the characteristics that often guide their decision-making process and actions in a socio-ecological context.
Let’s remember, there is no such thing as your ‘average farmer’. Homogeneity is not a word that British agriculture is particularly aware of. As a result, efforts to increase water use efficiency need to understand how certain characteristics influence the potential for action. Wheeler et al. have found a number of characteristics that can influence adaptation strategies. For example, a farmer with a greater belief in the presence of climate change is more likely to adopt mitigating or adaptive measures. Importantly, this can also be linked to more-demographic factors. As Islam et al. have argued, risk scepticism can be the result of a number of factors (such as: age, economic status, education, environmental and economic values) and that these can be linked to the birth cohort effect.
This is not to say that all farmers of a certain age are climate-sceptics but it does point to an important understanding of demography as a factor in the adoption of innovative measures. Wheeler et al. went on to cite variables of environment values, commercial orientation, perceptions of risk and the presence of an identified farm successor as potentially directing change in practice . Research by Stephenson has shown that farmers who adopt new technologies tend to be younger and more educated, have higher incomes, larger farm operations and are more engaged with primary sources of information.
Yet, there is one social pressure that future policy must take into account – friendly, neighbourly competition. Keeping up with the Joneses. Not wanting Farmer Giles down the lane knowing that you overuse water in an increasingly water-scarce future. This can be harnessed within a system of benchmarking. Benchmarking involves the publication of individual farm’s water use, irrigation characteristics and efficiency and farming practice. Although data is supplied anonymously, individual farmers will be able to see how they measure up against their neighbours, competitors and others elsewhere.
Benchmarking is used in other agricultural sub-sectors. A 2010 survey found that 24% of farmers from different sectors used benchmarking in their management processes. This is particularly evident in the dairy sector, where both commercial and public organisations use the methods as a way to understand individual farm performance – an important example of this would be DairyCo’s Milkbench+ initiative. In 2004, over 950,000 hectares of irrigated land in Australia, 385,000 hectares in China and 330, 000 hectares in Mexico were subjected to benchmarking processes as a mean to gauge their environmental, operational and financial characteristics.

The result is that irrigators would have the means to compare how they are performing relative to other growers – allowing the answering of important questions of ‘How well am I doing?’ ‘How much better could I do?’ and ‘How do I do it?’ Furthermore, this route can be perceived as limiting the potential for ‘free-riding’ behaviour within a catchment as well emphasise the communal nature of these vulnerable resources. We’ve all seen ‘Keeping up with the Joneses’ result in increased consumption – benchmarking provides us with an important route to use this socialised nudging for good.

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This blog is written by Cabot Institute member Ed Atkins, a PhD student at the University of Bristol who studies water scarcity and environmental conflict.

 
Ed Atkins
Read part 1 of this blog series Why is there a difficult absence of water demand forecasting in the UK?

Why is there a difficult absence of water demand forecasting in the UK?

Posted on by janet.crompton
Image credit: Ralf Roletschek, permission from – Marcela auf Commons.
From August 2015 to January 2016, I was lucky enough to enjoy an ESRC-funded placement at the Environment Agency. Located within the Water Resources Team, my time here was spent writing a number of independent reports on the behalf of the agency. This blog is a short personal reflection of one of these reports, which you can find here. All views within this work are my own and do not represent any views, plans or policies of the Environment Agency.
 
In a world away from Melanie Phillips and David Bellamy, it is widely accepted that the twinned-spectres of climate change and population growth will likely affect levels of water availability in England and Wales, whilst also exposing the geographic imbalance of water supply-demand dynamics within the country. The Environment Agency has utilised a number of socioeconomic scenarios to predict total demand to change at some point between 15% decrease (if the nation undergoes a transition towards sustainability) to a 35% increase (in a scenario of continued and uncontrolled demand for the resource).
 
It is within this context that the need to understand future patterns of water demand has become essential for the future resilience of the nation’s water. The Labour government’s Future Water strategy (signed-off by Hilary Benn) 2008 set a national target of reducing household water consumption by 13%. This plan was further incentivised by Ofwat’s scheme to reward companies that reduce annual household demand by one litre of water per property, per day in the period 2010/11-2014/15.
 
What does our future household water use look like? Whilst per capita consumption will decrease, the number of people using the water grid will increase: resulting in a growth of overall demand. 22 predictions related to public water supply projected a median change of +0.89%. However there are additional complexities: as certain uses of water will decrease, others will increase; as appliances become more water efficient, they will be more likely to be used; and as one business closes, another may join the grid. It is this complexity that creates a great deal of uncertainty in gauging the future water demand of the sector.
Image credit: Nicole-Koehler
But, there exists a problem. Whilst the legally-mandated water management plans of the public water suppliers provide us with a wealth of forecasts of the future water usage within our homes, there exists a lack of available information on the current use of water within many other sectors and how such usage may shift and transform in the years between today and 2050.
 
This report lays out an extensive review of available literature on the current and future demand of a number of sectors within the UK. It found nine studies of the agricultural sector – with a median projection of 101% increase in water usage. Three studies of the energy sector projected a median decrease of 2% on a 2015 baseline. But, it also found some gaps that restrict our understandings of future water demand.
 
Want to find out how much water is used in the construction sector? Tough, no chance. The mining and quarrying sector – ready your Freedom of Information request. Want to calculate the future water footprints of our food and drink – prepare to meet that brick wall. If such information is available, it is not in the public domain. Without having a publicly-available baseline, how can we even dream of predicting what our future demand may be?
Crop irrigation.  Image credit: Rennett Stowe.
Water is not just turning on the shower in the morning or boiling the kettle at the commercial break. It is present in our food, our energy and our infrastructure. As a result, it is of the utmost importance that we look to gauge the water use of sectors. Yet, in this regard, we are blind. Although there do exist academic studies and research into the future water demand of the agricultural and energy sectors, this has proved limited and relatively inconclusive, due to the nature of the studies. Furthermore, there is an absence of any such work conducted across the manufacturing and industrial sectors (with the exception of the food and drink industry). This limitation of information makes providing a confident summary of what the water demands of many of these sectors will look like in 2050 highly difficult.
 
Yes, the key areas of missing research identified in this document do not necessarily equal a lack of information within these sectors – just that such information is either not publicly available or is very difficult to find. It would be unwise to believe that the sectors in question have no understanding of what the future may hold, regarding their water demand. But, in a world of the interdependencies of the food, energy and manufacturing sectors with water usage – it is important for research to know how this nation’s water is used, where it is used and how this demand can be met and/or decreased in an increasingly uncertain future. The food and drink sector is heavily linked to the agricultural sector; the power industry is linked to decisions made within the extractive industries (such as those surrounding fracking); and all are linked to mains water supply and direct abstraction.
 

These interdependencies and lack of information provide future water demand with even greater uncertainty. Whilst carbon emissions are monitored and water quality is policed, there continues to be a lack of transparency of how certain sectors are using this nation’s water. If this continues in a world that will increasingly be formed of policy and environmental trade-offs, there is a realistic danger that any potential water crisis may be much worse than we expect. 

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This blog is written by Cabot Institute member Ed Atkins, a PhD student at the University of Bristol who studies water scarcity and environmental conflict.

Ed Atkins

Read part two of this blog series Is benchmarking the best route to water efficiency in the UK’s irrigated agriculture?

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