水库下游清水冲刷影响下的河道调整规律研究  

Study on the Riverbed Adjustment Principle Caused by Clear Water Scouring at the Down Stream of Reservoir

作　　者：李国志[1] 黄良文[2] 郭志学[3] 

机构地区：[1]双流县水务局,四川成都610089 [2]中国水电顾问集团成都勘测设计研究院,四川成都610072 [3]四川大学水力学与山区河流开发保护国家重点实验室,四川成都610065

出　　处：《四川大学学报（工程科学版）》2010年第3期36-42,共7页Journal of Sichuan University (Engineering Science Edition)

基　　金：国家自然科学基金资助项目(50949057;50579040)

摘　　要：水库修建后,改变了河道来水来沙条件,建成初期,由于泥沙被拦截在库内,下泄水流基本为清水,一般会对下游河道造成一定程度的冲刷调整。采用平面2维水沙数学模型研究了大渡河某水电工程修建后,对下游河道的清水冲刷影响,分析了水位、流速、河床冲淤等参数在常遇洪水作用下的变化。研究表明,清水下泄可以带来下游河道断面形态的调整,河床总体冲刷下切,流速分布趋于均匀,水位明显降低。Two-dimensional mathematical model of water and sediment was adopted to study the infection of erosion on the downstream river in Dadu River after a hydropower station had been built.Some parameters,such as water level,velocity,and erosion depth of river-bed were analyzed in the condition of usual flood.The result showed that rinsing discharge can lead to the adjustment in the downstream river cross-section morphology,the cutting in the overall of the riverbed,the uniform velocity distribution and the significantly decreasing of water level.

关 键 词：清水冲刷 数学模型 河床调整 流速分布 水位 

分 类 号：TV145[水利工程—水力学及河流动力学]