黄河下游漫滩洪水淤滩刷槽基本规律分析

发布时间：2019-05-12 05:06

【摘要】：通过分析黄河下游11场典型漫滩洪水的资料,探讨了发生漫滩洪水时滩槽水沙的交换模式及淤滩刷槽的机理。结果表明:1花园口—利津河段滩地淤积量随着花园口站来沙量的增大而增大,滩地淤积量越大,相应河段主河槽的冲刷量越大;211场典型漫滩洪水过程中,除1953年第二次大洪水槽滩均发生淤积,1988年、1996年主河槽冲刷量占滩地淤积量的比例较低外,花园口—利津河段主河槽冲刷量基本上为滩地淤积量的65%~99%;3漫滩洪水全断面冲淤量随含沙量的变化趋势与不漫滩洪水主槽冲淤量随含沙量的变化趋势基本一致。
[Abstract]:By analyzing the data of 11 typical floodplain floods in the lower reaches of the Yellow River, this paper discusses the exchange mode of water and sediment in the floodplain trough and the mechanism of the bank brushing trough when the flood occurs in the lower reaches of the Yellow River. The results show that: (1) the amount of beach siltation in Huayuankou-Lijin River section increases with the increase of sediment coming from Huayuankou Station, and the larger the amount of silt in the beach is, the greater the scour amount of the main channel in the corresponding reach is; In the process of 211 typical floodplain floods, except for the second major flood channel beach in 1953, the main channel scour accounted for a low proportion of beach deposition in 1988 and 1996. The scour of the main channel in the Huayuankou-Lijin reach is basically 65% 鈮，

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