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在水电站的设计中,正常蓄水位是水库设计的主要参数,它关系到水电站的综合利用效益。提高正常蓄水位,可增加库容,有利于削减洪峰,减少下泄流量,提高下游防洪标准,增加水电站的保证出力和发电量,还可增加调节水量,扩大下游灌溉面积和改善航运条件。但随着正常蓄水位的提高,工程投资和年运行费用递增,淹没增加,迁移人口增多,工程量
In the design of hydropower station, the normal water level is the main parameter of reservoir design, which is related to the comprehensive utilization efficiency of hydropower station. Increasing the normal water level can increase the storage capacity, which can help to reduce the flood peak, reduce the discharging flow, raise the downstream flood control standard, increase the guaranteed output and generating capacity of the hydropower station, increase the regulating water volume, expand the downstream irrigation area and improve the shipping conditions. However, as the normal water level increases, the project investment and annual running costs will increase, flooding will increase, the number of migrants will increase,