Abstract:

With the improvement of rainfall forecasting level，reservoir forecast operation on rainfall has drawn more and more attention.In this paper,through analyzing the feasibility of flood control operation for Ankang reservoir and taking “total forecast information of cumulative net rain” as main indicator and “reservoir water level” as auxiliary indicator,we set reservoir forecast operation rule with double indicators for Ankang reservoir by “gradually adjusting method”,then regulated flood design and actual flood. Results show that water level of reservoir fell in advance below the flood control level,the capacity of the flood control increased,discharge in the peak stage reduced and the highest level in forecast operation was lower than that in normal operation,which improved the flood control ability.At the same time,we selected different initial water level to regulate flood design and actual flood,and chose the more appropriate one and analyzed the risk in forecast and normal operation.Results show that initial water level increased,the risk of forecast also increased but under the normal operation.Thus,we proposed that flood control level could be set at 326 m to realize floodwater resources utilization