The sedimentation of reservoir will not only reduce the effective storage capacity of reservoir,affect the service life and power generation efficiency of reservoir,but also affect the regulation capacity of reservoir and increase the flood control pressure of reservoir.The prediction of sediment deposition in reservoir area is helpful to grasp the trend of sediment deposition during the operation of reservoir,to formulate reasonable operation mode to achieve the purpose of sediment control and reduction,and to extend the service life of hydropower station.A one-dimensional constant non-uniform and unbalanced sediment transport mathematical model is used to predict the sedimentation trend of Liyuan and Ahai reservoirs in the middle reaches of Jinsha River after the completion of Liyuan-Ahai hybrid pumped storage hydropower station considering the upstream cascade hydropower station.The results show that:The sediment of Liyuan and Ahai reservoirs is mainly deposited in the middle to the end of the reservoir,the sediment elevation in front of the dam is low,and the sediment deposition degree in the reservoir is light.After 100 years of operation of Liyuan-Ahai hybrid pumped storage hydropower station,the total amount of sediment deposition in Liyuan Reservoir and Ahai reservoir is about 121 million m3 and 194 million m3,and the loss rate of storage capacity was 8.43％and 14.4％,respectively.
关键词
泥沙淤积/梨园-阿海混合式抽水蓄能电站/预测/库容淤损率
Key words
sediment deposition/Liyuan-Ahai hybrid pumped storage hydropower station/prediction/storage capacity loss rate
维普
万方数据