文献类型：期刊文献

英文题名：Influence of Vegetation on Turbulence Characteristics and Reynolds Shear Stress in Partly Vegetated Channel

作者：Zhang, Huayong[1] Wang, Zhongyu[1,2] Dai, Liming[2] Xu, Weigang[3]

第一作者：Zhang, Huayong

通信作者：Dai, LM[1]

机构：[1]North China Elect Power Univ, Res Ctr Engn Ecol & Nonlinear Sci, Beijing 102206, Peoples R China;[2]Univ Regina, Ind Syst Engn, Regina, SK S4S 0A2, Canada;[3]Chinese Acad Forestry, Inst Wetland Res, Beijing 100091, Peoples R China

年份：2015

卷号：137

期号：6

外文期刊名：JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME

收录：;EI(收录号：20151100622896);Scopus(收录号：2-s2.0-84924277172);WOS:【SCI-EXPANDED(收录号:WOS:000353966000007)】；

基金：The authors acknowledge with great appreciation for the support provided by the National Special Water Programs (No. 2009ZX07210-009), the Chinese Natural Science Foundation (No. 39560023), Department of Environmental Protection of Shandong Province (SDHBPJ-ZB-08), and the China Scholarship Council (No. 201306730009). The collaboration with the University of Regina is important to the present research.

语种：英文

外文关键词：Banks (bodies of water) - Turbulence - Vegetation

摘要：From the perspective of vegetation density, this research studies the influence of vegetation on turbulence characteristics and Reynolds shear stress in partly vegetated channel via a series of experiments. Natural reed is employed to simulate the emergent vegetation in rivers. Different vegetation densities including vegetated and unvegetated cases are considered in the research. The results of the research demonstrate that emergent vegetation may force the water flowing from vegetated areas to unvegetated areas and the forcing intensity increases with reed density. It is also found that the relative turbulence intensity declines along the vegetated channel in the direction of flow. Vegetation is found to reduce the total-average Reynolds shear stress therefore reduce the soil erosion. However, the Reynolds shear stress reduction is found disproportional to the vegetation density, and an optimal vegetation density range is quantitatively determined in the research. The findings of the research are significant to the practice of river ecological restoration.