运行水位优化对溪洛渡水库排沙影响研究OA

To study the impact of optimizing operating water level on sediment discharge of Xiluodu Reservoir,a one-dimensional unsteady flow and sediment mathematical model of Xiluodu Reservoir was established based on measured data after water storage,and the model was validated.Then,the impact of different operating water levels on sediment discharge in Xiluodu Reservoir was calculated.The calculation results show that the sediment discharge conditions of Xiluodu Reservoir are poor from July to September.During the flood season from July to August,the reservoir only possesses limited sediment discharge capacity when the inflow is large.During the storage period in September,the sediment discharge capacity of the reservoir is relatively small.In July and August,when there is a large influx of water,the sedimentation amount and proportion in the variable return water area of Xiluodu Reservoir are very small when the water level is below 590 m.After the water level is above 590 m,the sedimentation proportion in the variable return water area begins to increase,but the sedimentation amount is still very small.When the incoming water is small,the change pattern is similar,but the corresponding critical reservoir water level decreases to 585 m.In September,when the initial storage water level is below 580m,the sedimentation amount and proportion in the variable return water area are relatively small.When the initial storage water level exceeds 580m,the sedimentation proportion in the variable return water area begins to further increase,but the sedimentation amount in the variable return water area is still very small.This study can provide reference for optimizing the operating water level of Xiluodu Reservoir after its construction.