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黄河下游游荡河段清水冲刷时期河床调整的复杂响应现象
引用本文:许炯心.黄河下游游荡河段清水冲刷时期河床调整的复杂响应现象[J].水科学进展,2001,12(3):291-299.
作者姓名:许炯心
作者单位:中国科学院地理科学与资源研究所, 北京100101
基金项目:国家自然科学基金资助项目(49970014);中国科学院地理科学与资源研究所创新项目(CX IOG-A00-05).
摘    要:以1960~1962年三门峡水库下泄清水时期定位观测资料为基础,研究了清水冲刷条件下黄河下游河床调整过程。结果表明,由于河床边界条件的不同,游荡段的上段(铁谢-桃花峪)和下段(桃花峪-辛寨)的河床调整过程表现出明显的差异,由此可以划分两种不同的调整方式和复杂响应类型:河岸抗冲性强、河床组成物质较粗的河段,河床调整及其中的复杂响应主要与水力参数有关;河岸抗冲性弱、河床物质组成较细的河段,河床调整中的复杂响应主要与河床形态有关。研究所得结论,可为预测小浪底水库建成后黄河下游河床演变趋势提供参考。

关 键 词:水库下游河床调整    清水冲刷    复杂响应    河床边界条件    黄河下游
文章编号:1001-6791(2001)03-0291-09
收稿时间:2000-05-15
修稿时间:2000年5月15日

Complex Response in Channel Adjustment in the Lower Yellow River during the Period of Clear-Water Scour
XU Jiong-xin.Complex Response in Channel Adjustment in the Lower Yellow River during the Period of Clear-Water Scour[J].Advances in Water Science,2001,12(3):291-299.
Authors:XU Jiong-xin
Institution:Institute of Geographical Sciences and Natural Resources, Chinese Academy of Sciences, Beijing 100101, China
Abstract:Based on the data of the Sanmenxia Reservoir during the period of clear-water scour in 1960-1964,the channel adjustment under the conditions of clear-water scour has been dealt with in the paper.The results indicate a marked difference in channel adjustment between the upper and lower reaches of the braided channel (the reach Tiexie to Taohuayu and the reach Taohuayu to Xinzhai).Accordingly,two types of complex response in channel adjustment have been identified:in the reach where the erosional resistance of bank material is strong and the bed material is coarse,the complex response is related with the adjustment of hydraulic parameters;and in the reach where the erosional resistance of bank material is weak and the bed material is fine,the complex response is related with the adjustment of channel morphology.These can be referred for predicting the tendency of channel change after the construction of the Xiaolangdi Reservoir.
Keywords:channel adjustment downstream from a reservoir  clear water scour  complex response  channel boundary conditions  The lower Yellow River    
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