文献类型：期刊文献

英文题名：Effects of Rigid Unsubmerged Vegetation on Flow Field Structure and Turbulent Kinetic Energy of Gradually Varied Flow

作者：Zhang, H. Y.[1] Wang, Z. Y.[1,2] Xu, W. G.[3] Dai, L. M.[2]

第一作者：Zhang, H. Y.

通信作者：Dai, LM[1]

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

年份：2015

卷号：31

期号：9

起止页码：1166-1175

外文期刊名：RIVER RESEARCH AND APPLICATIONS

收录：;Scopus(收录号：2-s2.0-84946490699);WOS:【SCI-EXPANDED(收录号:WOS:000364533800011)】；

基金：The authors acknowledge with great appreciation the support provided by Chinese National eleventh 5-year plan S&T supported Project (No. 2006BAC10B03), the National Special Water Programs (No. 2009ZX07210-009) and the Chinese State Scholarship Fund from 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：water surface profile; flow velocity distribution; turbulent kinetic energy; vegetation density; gradually varied flow; river ecological restoration

摘要：The influence of rigid unsubmerged vegetation on flow structure and turbulent kinetic energy of gradually varied flow are experimentally investigated in this research. Natural reed stems of different densities are employed to examine the effects of the rigid unsubmerged vegetation on the flow in rivers. The results reveal that the vegetation existence significantly changes the gradually varied flow state from type M1 to type M2 in the vegetation section. The traditional power law describing the vertical flow velocity profile is evidently invalid when the vegetation density becomes high. With the irregularity index proposed in the research, the irregularity of vertical flow velocity profile in vegetated reach can be exponentially described in relation to the vegetation density. Furthermore, the turbulent kinetic energy is found to increase and reach a maximum value near the end of the vegetation section that is a potential localized erosion area. The results of the research have significances in river ecological restoration applications utilizing aquatic vegetation. Copyright (c) 2014 John Wiley & Sons, Ltd.