Study on Flood Discharge and Countermeasures of ShiQiao Reservoir Spillway

The ShiQiao Reservoir was built in the 1950s, whose main functions are irrigation and flood control. With the increasing number of downstream agricultural water, the contradiction is increasingly prominent between pettier beneficial capacity and the raising downstream agricultural water; at the same time, due to the disrepair of spillway and the increase of upstream inflow, the original spillway flood discharge capacity cannot meet the requirements for flood control. On the basis of systematical investigations of engineering geology and hydrogeological, an effective method is proposed for plain reservoirs to solve these problems. The method is, by improving the weir crest elevation and widening spillway to address the inadequate of beneficial capacity and the low standard of flood control spillway. Through the validation of analysis and calculation, this method is feasible and economical. It fundamentally solves the problems of ShiQiao Reservoir, and ensures the safe operation of this reservoir.