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The Meaning of “Natural”: Otmoor RSPB Reserve

By Medha Mukherjee, WSPM ’20-21

Photo by William O’Sullivan, WSPM ’20-21

As the global population continues to cope with the COVID-19 pandemic, a team of Water Science, Policy and Management (WSPM) students, embarked on an induction field trip to the Otmoor RSPB (Royal Society for the Protection of Birds) Reserve on a cold October morning. They were ready to wade through the wetlands in small groups, keeping their face masks on and walking two meters apart but grateful to experience something in person months into the new Covid reality of 2020. The objective was to understand the historical background of the wetlands to be able to critically engage with its current contexts of maintaining water quality, managing water levels along with natural flood management, which are in place to meet the RSPB’s aim of nurturing certain bird species. But all through the trip led by their Course Director Dr. Jocelyne Hughes, Dr. Troy Stenberg and Patrick Thomson, one vital question kept coming to the surface – What does “natural” really mean in a highly manipulated freshwater ecosystem?

Located to the northeast of Oxford, Otmoor is a low-lying area of roughly 1000 hectares, the social history of which relates directly to its current hydrological and environmental issues. Once a marshland, with the River Ray as its primary source of water, Otmoor was drained after the 1815 Act of Enclosure, and the River Ray rechanneled, in an attempt to turn the wetland into a farmland. The move had disastrous effects, causing severe downstream floods with the villagers rioting and breaking the embankments to let Otmoor flood naturally again. Then in 1997, the RSPB established the nature reserve, isolating the wetland from the river system. It is now a precipitation-based wetland, with a strong water balancing system in place for the creation of a conducive habitat for bird species such as snipe, redshank, lapwing and others, in a rather expensive attempt to control the ecosystem. The water levels are maintained with the help of pump stations up and down the reserve, with trenches cutting through the grasslands, and scrapes and surface ponds dug out to hold water. To further conserve biodiversity, cows are used to graze out dominant plant species and increase biodiversity, and electric fences keep predators such as foxes and badgers out, thus ensuring a safe nesting ground for the birds. One student commented how surprised he had been that a seemingly pristine wetland was actually sustained with hidden pipes and pumps.

The WSPM team was joined by Heather Bond, an Oxford WSPM alumna currently working for the Environmental Agency, who further explained the hard engineering approaches for natural flood risk management and the efforts to create an optimal balance between letting the wetlands flood naturally, and keeping the rising water levels from affecting nearby farmlands and villagers. As the students stood on a bund constructed for flood risk mitigation, they looked out onto the vast green stretch of serene wetlands under the pouring grey sky, realizing how the sheer magnificence of this “natural” habitat is actually held in place and carefully managed by a highly mechanized system. Thinking about the meaning of “natural” in the age of the Anthropocene, thus, becomes a moral imperative in environmental and socio-political enquiry.

Owing to increasing rainfall, the field trip finally ended in a barn with a deeply insightful session conducted by two local female farmers who manage an award-winning flock of sheep at the nearby Hill End Farm in Noke. They shared first-hand experiences of living in a wetland area, tackling the binary of either being too wet or too dry—the need for a very delicate balance to maintain equilibrium for natural wildlife and the sheep–while dealing with water pollution from raw sewage discharge, which is poorly managed by a private utility company.

Two days later, Hill End Farm messaged the group about the weekend of rain, “I had to evacuate the ewes out of the lower field yesterday morning. I recorded 50mm in 24 hours…It does seem weather patterns are changing.” In some locations 50mm in a day would be high but not unusual. In Oxfordshire, that amount marked the highest amount of rainfall in 24 hours since observations began in 1827. On this field trip, students had seen first-hand humans have manipulated the environment at Otmoor to ensure co-existence between wildlife and humans, but can that balance be maintained by anthropogenic activities when it comes up against the looming extremes of water in the climate change crisis, also propelled by anthropogenic activities?

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Ebro River’s Lessons for WSPM students

By Lucy Chen, WSPM ’18-’19

How can we equitably and efficiently manage and allocate scarce water resources in a river basin with high hydrological variability and competing demands among a multitude of stakeholders? On Sunday March 10, this was the question that MSc students from the Water Science, Policy and Management (WSPM) programme kept in the back of their minds as they embarked on a sun-drenched, week-long field trip across Spain’s Ebro River basin.

At 910 km, the Ebro is the longest river in Spain and its basin covers 17% of the country’s territory, spanning nine of its seventeen autonomous regions. Since the early 20th century, Spain’s national government under Franco funded ambitious dam projects to smooth out the steep hydrograph that brought unpredictable floods and droughts, promoting economic development and fostering nationalism. Today, vast stretches of vineyards, as well as almond and olive plantations in Ebro’s semi-arid central valley testify to this legacy while tensions between domestic and industrial supply, power generation, agriculture, recreation and conservation form an ongoing challenge for the Ebro Basin Water Authority, the Confederación Hydrograficá del Ebre (CHE).

The WSPM students took a plunge into the Ebro’s hydrological past to understand its future. They travelled to the once vibrant village of Ruesta, which was displaced by the construction of the Yesa dam in the 1950s; to the infamous Flix reservoir, which is still wrangling with more than half a century of mismanagement of industrial waste; to the Ebro Delta wetlands, where rice agriculture, tourism and conservation collectively face the threat of rising sea levels; and finally to the Llobregat desalination plant—a 235m € solution to Catalonia’s water scarcity problem that currently only operates at 10% of its full capacity—raising questions about the true cost of resilience. The field trip ended with an expert panel discussion on water management trade-offs with Michael Hanemann, David Grey, Dustin Garrick and Lucia de Stefano. The students came away with the important insight that trade-offs are ultimately an issue of balancing between objectives, the choice of which entails deep philosophical reflections about rights and entitlements. Although finding the suitable objectives can be achieved at a community level by inviting citizens to reflect upon their common future, balancing benefits and costs between the local and national levels will remain a perpetual challenge.

 

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