低水头径流式电站回水计算及水库设计淹没范围的确定方法

水库回水计算是确定水库淹没范围，进行规划方案论证的基础工作。由于河道型水库回水情况与一般水库有较大的差异，因此不能采用常规的回水计算成果来确定水闸的淹没范围。长州水利枢纽的实例说明，河道型水库的径流式电站工程，其回水计算方法有别于高坝大库型工程，有更高的精度要求。

Calculation of backwater and method of defining inundated area in reservoir of low-bead river-run power station

Calculation of backwater in reservoir is foundational for defining inundated area in a reservoir and demonstration a planned program. Since there is a larger difference between backwater in river-run reservoir and in the general one,the results of the conventional calculation of backwater can not be used to define the inundated area of a river-run reservoir. The example of Changzhou Water Project with a river-run reservoir showed that,in comparison with the large reservoir with a high dam,the calculation of backwater in a river-run reservoir would have the higher precision requirements.