| 滩地植被对河道水流影响 |
| |
| 引用本文： | 陈正兵,江春波.滩地植被对河道水流影响[J].清华大学学报(自然科学版),2012(6):804-808. |
| |
| 作者姓名： | 陈正兵 江春波 |
| |
| 作者单位： | 清华大学水利水电工程系水沙科学与水利水电工程国家重点实验室 |
| |
| 基金项目： | 国家自然科学基金资助项目(51039002) |
| |
| 摘 要： | 该文结合实例河道运用环境流体力学代码(EFDC)模型研究滩地植被对河道水流的影响。模型通过建立植被阻力的经验公式,求解准三维水动力学方程,得到河道水流的水动力特征。通过模拟6组不同密度和高度的植被,并对流速和水位进行对比分析,结果表明:有植被存在时滩地水流显著减小。当植被密度600株/m2、高度为20cm时,滩地流速约为0.2m/s,此时河道水位相比无植被抬高0.2m左右;当植被高于1.0m时河道水位增加0.45m左右。研究结果对河道防洪和生态修复管理等有借鉴作用。
|
| 关 键 词： | 复式河道 植被 环境流体力学代码(EFDC) |
Effect of floodplain vegetation on river hydrodynamics |
| |
| CHEN Zhengbing,JIANG Chunbo.Effect of floodplain vegetation on river hydrodynamics[J].Journal of Tsinghua University(Science and Technology),2012(6):804-808. |
| |
| Authors: | CHEN Zhengbing JIANG Chunbo |
| |
| Institution: | (State Key Laboratory of Hydroscience and Engineering, Department of Hydraulic Engineering,Tsinghua University, Beijing 100084,China) |
| |
| Abstract: | An environmental fluid mechanics code was used to calculate the hydrodynamics of compound channels in a vegetated floodplain.The vegetation drag was modeled with an empirical formula.Six cases were considered including different vegetation densities and vegetation heights.The results show that the vegetation decreases the floodplain velocity and raises the mean water level to some extent.When the density is 600 stems/m2 and the height is 20 cm,the floodplain velocity decreases to 0.2 m/s and the water level increases 0.2 m.When the vegetation height is more than 1.0 m,the water level increases about 0.45 m.The results will help flood control and the building of ecological rivers. |
| |
| Keywords: | compound channel vegetation environmental fluid mechanics code(EFDC) |
| 本文献已被 CNKI 等数据库收录！ |
