The joint operation of the four-level cascade reservoirs(Wudongde,Baihetan,Xiluodu,Xiangjiaba)in the lower reaches of Jinsha River provides flood control security for Sichuan-Chongqing reach of Changjiang River.The evaluation on flood control effect can promote the utilization of flood resources in the basin.Based on the joint flood control operation scheme of the cascade reservoirs,an evaluation index system under the four criteria of flood control,power generation,ecology and shipping was established.Improved analytic hierarchy process and entropy weight method were adopted to construct an evaluation model of flood control operation effect of cascade reservoirs in Sichuan-Chongqing reach,and the flood control and benefits were comprehen-sively considered,so as to evaluate the flood control effect of cascade reservoirs with different inflow frequency and different water level of initial regulation.Comparing the effects of combined operation of Xiluodu-Xiangjiaba reservoirs and the four-level cas-cade reservoirs,we analyzed the comprehensive effects of Wudongde and Baihetan reservoirs on flood control operation and flood resource utilization in Sichuan-Chongqing reach.The results showed that:① the flood control efficiency coefficient of cascade reservoirs in the lower reaches of Jinsha River increased first and then decreased with the increase of the water level of initial reg-ulation of the Wudongde-Baihetan reservoirs.②For the 20-year return period flood,30-year return period flood,50-year re-turn period flood and 100-year return period flood,when the water level of Wudongde Reservoir and Baihetan Reservoir were regulated initially from(965 m,795 m),(975 m,790 m),(955 m,790 m),(952 m,795 m)respectively,the flood control effi-ciency coefficient of cascade reservoirs in the lower reaches of Jinsha River was the largest,and the joint flood control scheme of cascade reservoir was the best.③Since the Wudongde Reservoir and Baihetan Reservoir were built and put into operation,the u-tilization effect of flood resources in Sichuan-Chongqing reach has been improved.The research results can be used to evaluate the effect of flood control operation of multi-function and multi-protection object cascade reservoirs,and provide a basis for re-gional flood control operation decision.
关键词
联合防洪调度/洪水资源化/效果评价/层次分析法/金沙江下游梯级水库/川渝河段
Key words
joint flood control operation/flood resource utilization/evaluation of flood control effect/analytic hierarchy process method/cascade reservoirs in lower reaches of Jinsha River/Sichuan-Chongqing reach
维普
万方数据