Author(s): Peter W. Downs; Colin R. Thorne
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Abstract: River rehabilitation measures which use geomorphic characteristics of natural channels to minimize environmental impacts during and after construction were designed for the River Idle, UK. Simulation tests were performed to assist with the selection and siting of measures, and to predict their impacts on meander bend scour, channel conveyance and flood stages. Predictions showed that the only significant impact to be a reductions of 10% in channel capacity for medium-sized floods. Experience gained from the River Idle scheme indicates that the geomorphic approach, coupled with testing to assess hydraulic impacts, constitutes acceptable practice for rehabilitation design in rivers with multi-functional management requirements, particularly those involving flood defense.
Year: 1997