西霞院水库排沙控制水位优化研究  

Optimization of Controlled Water Level for Sediment Discharge of Xixiayuan Reservoir

作　　者：朱呈浩 谢慰 陈翠霞 陈松伟 ZHU Chenghao;XIE Wei;CHEN Cuixia;CHEN Songwei(Yellow River Engineering Consulting Co.,Ltd.,Zhengzhou 450003,China;Key Laboratory of Water Management and Water Security for Yellow River Basin,Ministry of Water Resources(Under Construction),Zhengzhou 450003,China;Yellow River Hydropower Development Corporation,Jiyuan 454681,China)

机构地区：[1]黄河勘测规划设计研究院有限公司,河南郑州450003 [2]水利部黄河流域水治理与水安全重点实验室(筹),河南郑州450003 [3]黄河水利水电开发集团有限公司,河南济源454681

出　　处：《人民黄河》2024年第10期33-37,共5页Yellow River

基　　金：国家自然科学基金资助项目(U22A20237,U2243237);水利部重大科技项目(SKS-2022088)。

摘　　要：为避免西霞院水库低水位敞泄排沙期间出现的泄流排沙建筑物挡墙损毁、铺盖掏空等冲刷破坏现象,同时控制泥沙淤积速度,需要提出科学合理的水库排沙控制水位。根据实测资料分析了西霞院水库在不同排沙控制水位下的排沙规律,通过一维水沙动力学模型计算了128.5、130.0、131.0 m共3个排沙控制水位方案对泥沙冲淤的影响。结果表明:1)水库排沙控制水位在131.0 m以下时排沙比基本在60%以上,在131.0 m以上时排沙比基本在50%以下;2)排沙控制水位131.0 m方案较130.0、128.5 m方案,水库累计淤积量仅增大2%~13%;3)计算期末(2033年)排沙控制水位131.0、130.0、128.5 m方案淤积形态均在设计淤积平衡形态之下,不会对水库运用产生不利影响。从工程安全的角度出发,推荐西霞院水库排沙控制水位为131.0 m。In order to avoid the erosion and damage of retaining walls and hollowed out bedding during the period of sediment discharge at low water level of Xixiayuan Reservoir,and to control the sedimentation rate of the reservoir,it is necessary to scientifically propose reasonable controlled water levels for sediment discharge.Based on measured data,the sediment discharge laws of Xixiayuan Reservoir under different controlled water level were analyzed.The impact of three schemes of controlled water levels for sediment discharge of 128.5 m,130.0 m,and 131.0 m on reservoir erosion and sedimentation was calculated by using a one-dimensional water and sediment dynamics model.The results show that a)when the controlled water level of the reservoir is below 131.0 m,the sediment discharge ratio is basically above 60%;and when the controlled water level of the reservoir is above 131.0 m,the sediment discharge ratio is below 50%.b)Compared with the 130.0 m and 128.5 m schemes,the 131.0 m scheme only increases the sedimentation volume in the reservoir area by 2%~13%.c)At the end of the calculation period of 10 years,sedimentation forms of the 131.0 m,130.0 m and 128.5 m schemes are all below the designed equilibrium form of sedimentation,which are not harmful to the project.From the perspective of engineering safety,it is recommended to control the water level for sediment discharge in Xixiayuan Reservoir at 131.0 m.

关 键 词：排沙控制水位 工程安全 累计淤积量 淤积形态 西霞院水库 

分 类 号：TV62[水利工程—水利水电工程] TV882.1