| 河渠水面线推求方向的可行性研究 |
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| 引用本文： | 刘曾美,吴俊校,陈明.河渠水面线推求方向的可行性研究[J].水利水运工程学报,2011,0(1). |
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| 作者姓名： | 刘曾美 吴俊校 陈明 |
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| 作者单位： | 1. 华南理工大学,水利水电工程系,广东,广州,510640
2. 广东省水利水电建设管理中心,广东,广州,510600 |
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| 基金项目： | 广东省防洪减灾研究项目 |
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| 摘 要： | 河渠水面线的推求,首先必须确定推求方向,因为虽然从理论上可从上游或下游断面开始递推,但实际上都可能遇到无法推求的情况.构建的规则河渠水面线推求方向可行性分析方法,首先分析水面线计算式上、下断面能量函数曲线的特性,研究计算河段长度、河道底坡对其的影响;然后探讨上、下断面的能量函数曲线相对位置关系,从而探究无法推求的原因及求解的规律性,并以实例进行分析.研究结果表明,由下游向上游推求等截面缓坡、临界坡河段及收缩河段,或由上游向下游推求等截面陡坡、临界坡河道及扩散河段,总能找到可行解或通过缩短计算河段长度找到可行解;而由上游往下游推求等截面缓坡河段、收缩河段,或由下游向上游推求等截面陡坡河段、扩散河段时,则存在无解区域,且无解区域发生在临界流态的某一邻域内,邻域左右半径不一定相等;此外,河段长度愈长,坡度愈陡,邻域半径愈大.
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| 关 键 词： | 水面线 推求方向 可行性 能量函数曲线 |
Feasibility study on the computational direction of flow profile of river and channel |
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| LIU Zeng-mei,WU Jun-xiao,CHEN ming.Feasibility study on the computational direction of flow profile of river and channel[J].Hydro-Science and Engineering,2011,0(1). |
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| Authors: | LIU Zeng-mei WU Jun-xiao CHEN ming |
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| Affiliation: | LIU Zeng-mei1,WU Jun-xiao2,CHEN ming2(1.Department of Water Conservancy and Hydropower Engineering,South China University of Technology,Guangzhou 510640,China,2.Guangdong Province Water Conservancy and Hydropower Engineering Center for Supervision in Construction,Guangzhou 510600,China) |
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| Abstract: | The computational direction must be decided first in computation of water surface profile of river and channel.Theoretically,it can be obtained from either the upstream cross-section or the downstream cross-section of the calculated reach.However,in practice,when the calculation is carried out from either the upstream cross-section or the downstream cross-section,it may often be encountered that the results can not be reached.The method for analyzing the feasibility of computational direction of water surfa... |
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| Keywords: | flow profile computational direction feasibility energy function curve |
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