黄河下游二级悬河段河势及漫滩模型分析  

Analysis on River Regime of Secondary Elevated Section and Bankfull Model of the Lower Yellow River

作　　者：罗立群[1] 张敏[1] 王卫红[1] 李勇[1] 

机构地区：[1]黄河水利科学研究院水利部黄河泥沙重点实验室,河南郑州450003

出　　处：《人民黄河》2010年第4期15-16,共2页Yellow River

基　　金：水利部科研院所社会公益研究专项(2004DIB3J128);中央级公益性科研院所科研业务费专项资金资助项目(HKY-JBYW-2007-05)

摘　　要：结合实体模型试验,在洪量和沙量不变的情况下,对概化处理后不同量级洪水条件下黄河下游二级悬河段的水沙过程进行了研究。结果表明:随着洪峰流量加大,进入滩区的水量也随之增大,其漫滩范围和落淤厚度有逐步增大的趋势,但漫滩洪水基本流路无大的变化;漫滩洪水的水流交换模式包括在三角形滩区内完成的淤滩刷槽交换模式和水流漫滩后通过较长距离条形滩区落淤后回归主槽的交换模式。It studies the process of sediment and discharge of different size floods of the secondary elevated section of the lower Yellow River after generalization treatment by combining with physical model tests and under the conditions of invariant flood and sediment volumes.The outcomes show that a) along with the increase of peak discharge,the water flow into the floodplain also increases,the scope of flooding and deposition thickness are increasing gradually,but there is no big changes for basic flow path of bankfull floods;b) the flow exchange modes of bankfull floods includes the exchange mode of floodplain deposition and channel scouring completed at triangular floodplain and exchange mode of back to the main channel after sedimentation through strip-shape floodplain of longer distance.

关 键 词：河势 水沙变化 实体模型 漫滩模型 二级悬河 黄河下游 

分 类 号：TV85[水利工程—水利水电工程] TV882.1