文献类型：期刊文献

英文题名：Effects of Emergent Vegetation Patterns on Flow Velocity, Turbulence, and Erosion Around River Banks

作者：Wang, Zhongyu[1,2] Zhang, Huayong[1] Xu, Weigang[3] Wang, Hualin[1] Huang, Hai[1]

第一作者：Wang, Zhongyu

通信作者：Zhang, HY[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：2019

卷号：43

期号：3

起止页码：509-519

外文期刊名：IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY-TRANSACTIONS OF CIVIL ENGINEERING

收录：;Scopus(收录号：2-s2.0-85069744905);WOS:【SCI-EXPANDED(收录号:WOS:000477631700012)】；

基金：The authors would like to acknowledge with great appreciation the support provided by the Chinese Major Science and Technology Program for Water Pollution Control and Treatment (Nos. 2015ZX07204-007, 2015ZX07203-011), the Fundamental Research Funds for the Central Universities (No. 2017MS055), and the China Scholarship Council (No. 201306730009). The collaboration with Dr. Liming Dai at University of Regina is also appreciated.

语种：英文

外文关键词：Vegetation pattern; Flow velocity; Turbulence kinetic energy; Rigid unsubmerged vegetation; Soil erosion; Ecological river restoration

摘要：The effects of two different emergent vegetation patterns on the flow velocity and turbulent kinetic energy (TKE) along the vegetated banks are experimentally investigated with natural reed stems. The results reveal that vegetation patterns can significantly alter the distributions of flow velocity and TKE. At locations for the maximum TKE, closed concentric circles named recirculation cells are observed. The location for the maximum TKE which may induce potential soil erosion for partly vegetated pattern moves forward 1m in comparison with the vegetated pattern. An empirical function is found to describe the variations of TKE along the flow direction. Gentler distributed flow velocity and lower TKE at the rear part of the vegetation section for partly vegetated pattern suggest that vegetation pattern is an important factor for aquatic vegetation recovery in rivers. The findings of the research may provide some guidance for the engineering practices of river ecological restoration with aquatic vegetation.