中塬沟水库泥沙淤积形态分析与计算

Analysis and Calculation for Sediment Deposition Feature of Zhongyuangou Reservoir

中塬沟水库是咸阳市亭口水库反调节蓄水工程,为确定反调蓄工程泄洪建筑物的进口高程,该文对坝前沟道内的泥沙分别用三角洲淤积形态法、锥体淤积形态法和经验面积减少法进行形态分析与淤积计算。结果表明,采用三角洲淤积形态在不考虑异重流情况下的计算结果适合中塬沟水库泥沙淤积形态分布,与实际基本符合。水库在运行50 a后,坝前淤积高程将达到881.0 m,泄洪洞口前淤积高程达到883.0 m,该结果为泄洪洞进口高程设计提供依据。

Zhongyuangou Reservoir is a restorage project of Tingkou Reservoir in Xianyang.Here,the analysis and calculation for sediment deposition feature in front of the dam are conducted by using the delta deposit method,conic deposit method and empirical area reducing method.The results show that the calculated result by the delta deposit method is in accordance with the sediment deposition feature distribution of Zhongyuangou Reservoir not considering the density current,and this result could provide the basis for designing the inlet elevation of spillway tunnel.