Numerical Ｒesearch on the Influence of Groin Layout on Aquatic Habitats in Medium-sized and Small Ｒivers
WEI Wen-jie1，ZHANG Xiao-xia2，ZHANG Xin-hua2
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1． Guizhou Survey and Ｒesearch Institute of Water Ｒesources and Hydropower，Guiyang 550002，China;
2． State Key Laboratory of Hydraulics and Mountain Ｒiver Engineering，Sichuan University，Chengdu 610065，China
The groin is a building widely used to improve and maintain the channel． According to a large amount of research by predecessors，the groin has a protective function to improve water ecological diversity and aquatic habitats of rivers． Flow has strong turbulent characteristics around the groins． Different layouts or arrangements of the groins can influence the development of river habitats． However，what kinds of layouts can improve the aquatic habitats most efficiently? In this study，on the basis of the theory of IFIM，the 2D shallow water equation models including sediment transportation and riverbed involution model combined with habitat available areas are employed to investigate the effectiveness of different groin layouts on the improvement of aquatic habitats for a typical fish in a small and medium-sized river． The results indicate that the head-to-head groin layouts can make the flow field more symmetrical，and can also get a better habitat available area WUA．These results can provide a reference for river water ecological restoration and management．
WEI Wen-jie，ZHANG Xiao-xia，ZHANG Xin-hua.
Numerical Ｒesearch on the Influence of Groin Layout on Aquatic Habitats in Medium-sized and Small Ｒivers[J].China Rural Water and Hydropower, 2017(9): 136-140
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