Table of Contents
Water, Volume 10, Issue 12 (December 2018)
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Cover Story (view full-size image) Reservoir sedimentation is a major concern in the operational management of dams and its [...] Read more. Reservoir sedimentation is a major concern in the operational management of dams and its appurtenant structures. This paper presents a methodology to characterize the annual sediment balance of reservoirs and to assess the effects of climate warming on the annual sediment yield. The methodology is tested on a case study, which consists of a cascade of hydropower reservoirs in the Swiss Alps. The results show that at present, the hydropower cascade formed by Oberaar, Grimsel and Räterichsboden retains about 92% of the annual sediment yield, of which only part of the finest suspended fraction reaches the river network downstream. Under a climate warming scenario with glacier retreat, both sediment yield and runoff will increase on annual average. Therefore, managing the likely greater annual inputs of sediments to the cascade is vital for the perennial use of the water storage facilities. View Paper here.