University of Glasgow Report Calls for Enhanced Sediment Management to Support Hydropower and Protect Ecosystems in Scotland

University of Glasgow Report Calls for Enhanced Sediment Management to Support Hydropower and Protect Ecosystems in Scotland

(IN BRIEF) A new report highlights the need for better sediment management in Scotland’s hydropower systems to ensure both efficient energy production and environmental protection. Commissioned by CREW and developed by the University of Glasgow and cbec eco-engineering, the study outlines practical solutions to address the challenges posed by sediment buildup and climate change, benefiting both the hydropower sector and river ecosystems.

(PRESS RELEASE) GLASGOW, 22-Jan-2025 — /EuropaWire/ — A new report commissioned by Scotland’s Centre of Expertise for Waters (CREW) highlights the urgent need for enhanced measures to address sediment buildup in hydropower systems while safeguarding wildlife and improving energy production. The report, produced by the University of Glasgow and cbec eco-engineering, outlines a series of strategies to optimize hydropower operations and reduce the negative environmental impact of sediment movement, particularly in light of the challenges posed by climate change.

The report’s findings underscore the crucial role of hydropower in Scotland’s renewable energy goals, specifically in helping meet the country’s target of net-zero emissions by 2045. However, the report also points out that impoundment systems, such as dams and weirs, can disrupt the natural flow of sediment downstream, which can harm aquatic ecosystems and reduce the efficiency of these power-generating structures. The buildup of sediment behind dams can block water flow, impacting power output and requiring costly removal efforts.

Scotland has seen an increase in smaller hydropower projects over recent years, which now play a key role in generating electricity for local communities. However, the sediment disruption caused by these installations remains a significant challenge. Increased rainfall due to climate change is expected to worsen this issue, with predictions suggesting a 25% rise in sediment levels in Scottish rivers in the coming years, as well as larger sediment particles being carried downstream by stronger currents.

In response to these challenges, the report offers a range of recommendations aimed at improving sediment management practices. Among these is the suggestion to plant trees along riverbanks and restore peatlands, which would help capture sediment before it enters waterways, reducing the need for expensive sediment removal from impoundments. Such actions would also provide additional environmental benefits, including carbon sequestration, contributing to Scotland’s broader climate goals.

Public support for better sediment management is strong, with an online survey indicating that Scottish households would be willing to pay up to £52 per year to improve river management. The report’s authors also highlight the need for greater communication and collaboration between hydropower operators, environmental agencies, and researchers to address sediment issues effectively.

Professor Richard Williams from the University of Glasgow’s School of Geographical & Earth Sciences, who led the research, emphasized the delicate balance required to both harness renewable energy and protect river ecosystems. He stated, “Hydropower is a vital part of Scotland’s renewable energy future, but we must ensure that its implementation doesn’t harm river health. Through collaborative efforts and knowledge sharing, we can find solutions that support both energy production and biodiversity.”

Dr. Chris Bromley of the Scottish Environment Protection Agency (SEPA) added, “This report provides essential guidance for operators, helping them understand the environmental importance of sediment continuity in rivers. Managing sediment is crucial for protecting habitats and ensuring the long-term health of our water ecosystems.”

Grace Gubbins from NatureScot emphasized the importance of balancing energy production with conservation efforts: “We must consider the impact of hydropower on wildlife and ecosystems. Sediment plays a vital role in river habitats, and this study’s recommendations will help mitigate negative effects on fish, birds, and insects.”

Dr. Olivia Lassiere from Scottish Canals also stressed the importance of adapting to climate change impacts while preserving Scotland’s wildlife: “We are already seeing the effects of climate change on our water infrastructure. This research is vital in helping us manage our resources and protect Scotland’s environment as we face future challenges.”

The full report, along with a video on sediment management, is available on CREW’s website.

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SOURCE: University of Glasgow