东庄水库运用方式对渭河下游减淤作用研究  

Research on Lower Weihe River Sediment Reduction of Dongzhuang Reservoir Operational Modes

作　　者：梁艳洁[1,2] 谢慰[3] 赵正伟[2] 罗秋实[2] 付健[2] 

机构地区：[1]黄河勘测规划设计有限公司博士后科研工作站,河南郑州450003 [2]黄河勘测规划设计有限公司,河南郑州450003 [3]黄河水利水电开发总公司,河南济源454650

出　　处：《人民黄河》2016年第10期131-136,共6页Yellow River

基　　金：国家重点研发计划项目(2016YFC0402503)

摘　　要：东庄水库坝址位于渭河最大的支流泾河,对渭河来水来沙有重要影响。通过水库合理运用可起到拦沙和调水调沙作用,有效减少入渭泥沙,协调水沙关系,从而减轻渭河下游河道淤积、扩大和维持中水河槽行洪输沙能力。基于一维非恒定流水沙数学模型,通过渭河下游河道冲淤计算分析,对东庄水库运用方式进行了比选。研究结果表明,东庄水库能够起到减淤、恢复和维持渭河下游中水河槽的作用,与拦沙期一次抬高汛限水位运用相比,逐步抬高汛限水位的运用方式对渭河下游减淤效果较好;拦沙后期入库流量大于等于600 m3/s且含沙量大于等于300 kg/m3时,进出库平衡运用方式对渭河下游河道减淤效果优于提前泄水运用方式。Dongzhuang Reservoir is located on the Jinghe River,which is the biggest tributary of Weihe River. It has important effects on the incoming water and sediment of Weihe River. Dongzhuang Reservoir can reduce the Weihe River incoming sediment effectively,enlarge and keep the flood discharge and sediment transport capacity of the medium flowing channel,playing important roles in sediment and water regulation operation. Based on the 1D unsteady flow and sediment mathematical models,by the computation of the lower Weihe River sediment erosion and deposition,the operational modes were compared. The result shows that the Dongzhuang Reservoir can reduce the deposition of the lower Weihe River,recover and keep the medium flowing channel. During the storage period,the way of raising the flood control level step by step can reduce the deposition more effectively than raising the flood control level by one time. At the later stage of the storage period,when the reservoir discharge is equal or greater than 600 m3/ s and the sediment concentration is equal or greater than 300 kg / m3,the way of the reservoir inflow equaling outflow is better than that releasing water ahead of time.

关 键 词：运用方式 渭河下游 减淤作用 平滩流量 东庄水库 

分 类 号：P333.4[天文地球—水文科学] TV882.1[水利工程—水文学及水资源]