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Session E8: Can We Measure Cumulative Effects Of Hydro-Power On Migratory Fish? Development Of A Cumulative Effects Model Framework, Iain Stewart-Russon, Simon Palmer, David Fraser
Session E8: Can We Measure Cumulative Effects Of Hydro-Power On Migratory Fish? Development Of A Cumulative Effects Model Framework, Iain Stewart-Russon, Simon Palmer, David Fraser
David Fraser, PhD
Abstract: The Environment Agency provides guidance for run-of-river hydropower schemes in England, but concerns about small effects from multiple single schemes led to a project to determine how these can be assessed and to test an approach on migratory fish populations. We developed a model to assess the impact of multiple hydropower schemes. The model forecasts catchment-scale cumulative effects using three elements: hydropower scheme, spatial fish population and fish life cycle. The scheme element includes effects that are important to migratory fish and those that can be quantified. These are: 1) impediment to up- and downstream migration; 2) alleviation of …