At last, river water level in different plan condition is calculated integrating the method of city runoff and river network hydraulics, to provide technical supports for flood-prevention projects.
进而将城市产汇流方法和河网水动力学方法相耦合，计算出在不同规划条件下的河网洪水位，以此为防洪规划工程提供技术支持。
The reservoir operation is controlled by flood prevention demanding, and the reservoir level must be descended before flood season.
三峡水库运行调度受防洪要求控制，水库必须在汛前泄降。
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