| 冲积河流滩槽定量划分方法及应用 |
| |
| 引用本文： | 哈岸英,吴 腾,陈 刚.冲积河流滩槽定量划分方法及应用[J].水利学报,2012,43(1):10-14. |
| |
| 作者姓名： | 哈岸英 吴 腾 陈 刚 |
| |
| 作者单位： | 1. 西安理工大学,陕西西安,710048
2. 河海大学港口海岸与近海工程学院,江苏南京,210098 |
| |
| 摘 要： | 通过理论分析与数值计算,研究了冲积河流漫滩水流水力因子的变化特性。结果表明,断面平均流速在漫滩瞬间迅速减小,然后逐渐增大;断面综合动能修正系数、动量修正系数均随水深而缓慢增加,在漫滩瞬间迅速增大,随即快速减小。根据漫滩水流水力因子沿水深的变化特性,提出采用断面横向平均流速为判别因子以定量划分复式断面的滩与槽。此外,文中将其应用于黄河下游漫滩水流的水沙数值模拟,其结果与实际情况符合较好。
|
| 关 键 词： | 流速 水力要素 漫滩 数学模型 冲积河流 |
Quantitative division method for floodplain and main channel of alluvial river and its application |
| |
| HA An-ying,WU Teng and CHEN Gang.Quantitative division method for floodplain and main channel of alluvial river and its application[J].Journal of Hydraulic Engineering,2012,43(1):10-14. |
| |
| Authors: | HA An-ying WU Teng and CHEN Gang |
| |
| Affiliation: | 1 (1. Xi’an University of Technology,Xi’an 710048,China;2. Hohai University,Nanjing 210098,China) |
| |
| Abstract: | An investigation on hydraulic characteristics of compound channel is presented in this paper. It shows that the composite velocity exhibits a sharp decrease immediately when water flows over floodplains and increase later, while kinetic energy coefficient and momentum coefficient exhibits a sharp increase immediately when water flows over floodplains and decrease later. Based on the hydraulic characteristics, the quantitative division method for floodplain and main channel of alluvial river is referred. The integrated velocity of compound channel is selected as the discrimination factor. The proposed method is used to divide the floodplain and main channel in flow and sediment mathematical model, and a good result is attained. |
| |
| Keywords: | velocity hydraulic factor floodplain mathematical model alluvial river |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《水利学报》浏览原始摘要信息 |
|
点击此处可从《水利学报》下载全文 |
|
