德尔西水电站水库泥沙淤积计算

Calculation of reservoir sediment deposition for Delsi hydropower station

德尔西水电站位于南美洲,属于多沙河流。本文采用CRS-1河流泥沙数学模型对水库进行泥沙淤积计算。根据库区纵横断面、水沙代表系列和泥沙级配等条件,对3种运行方式进行了计算。根据计算结果,电站淤积平衡年限约为2年,并给出了推荐电站运行方式。水库按推荐运行方式运行,淤积平衡后,库区泥沙淤积量15.27万m3,正常蓄水位以下库容损失25.18%,调节库容损失率8.85%,余27.38万m3调节库容供发电等使用。

The Delsi hydropower station is located in South America. The river sediment mathematical model of CRS-1 is adopted to calculate the reservoir sediment deposition. Based on the conditions of the reservoir vertical and cross section, the representative series data of water and sediment, the sediment gradation, etc, the sediment deposition are calculated under three operational modes. The results show that the sedimentation balance period is two years. After the sedimentation balance with recommended operational mode of reservoir, the sediment accumulation is 152,700m3 in the reservoir region, the reservoir capacity lost under normal water level is 25.18%, the loss rate of regulated storage capacity is 8.85%, and then the regulated storage capacity is reach 273,800m3 for the power generation.