| 滩地加宽及主槽变化对复式断面过流能力的影响 |
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| 引用本文： | 姬昌辉,张幸农,洪大林,谢瑞. 滩地加宽及主槽变化对复式断面过流能力的影响[J]. 人民长江, 2011, 42(24): 45-49 |
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| 作者姓名： | 姬昌辉 张幸农 洪大林 谢瑞 |
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| 作者单位： | 南京水利科学研究院水文水资源与水利工程科学国家重点实验室,江苏南京,210024 |
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| 摘 要： | 为了分析不同断面形态对复式断面过流能力的影响,针对概化的复式断面顺直型河道，应用数学模型分别计算并分析了滩地加宽和主槽位置变化河道滩槽流量分配比、沿程水位、河道水力坡降的影响。结果表明：当滩地过水面积小于4~6倍的主槽过水面积时，增大滩地的宽度可以明显降低河道的沿程水位；改变主槽的位置几乎不会影响河道的过流能力。
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| 关 键 词： | 复式断面河道 流量分配比 水力坡降 滩地 主槽 |
Influence of beach widening and main channel moving on conveyance capacity of compound channels |
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| JI Changhui , ZHANG Xingnong , HONG Dalin , XIE Rui. Influence of beach widening and main channel moving on conveyance capacity of compound channels[J]. Yangtze River, 2011, 42(24): 45-49 |
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| Authors: | JI Changhui ZHANG Xingnong HONG Dalin XIE Rui |
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| Affiliation: | JI Changhui,ZHANG Xingnong,HONG Dalin,XIE Rui(State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Nanjing Hydraulic Research Institute,Nanjing 210024,China) |
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| Abstract: | In order to analyze the influence of cross section morphology on the conveyance capacity of compound channels,aiming at generalized straight channel with compound cross section,we analyze the influence of beach widening and main channel moving on the flow ratio of beach and main channel,water level along the channel and hydraulic gradient using mathematical model.The results show that when the ratio of the flow areas of beach and the flow area of main channel is smaller than 4 to 6,the water level along the... |
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| Keywords: | compound channel flow division ratio hydraulic gradient beach main channel |
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