Research advance on ecological design of irrigation channel
BI Bo1, CHEN Dan1*, TANG Shuhai2, CHEN Jing1, BI Lidong1
1.Key Laboratory of Efficient Irrigation-Drainage and Agricultural Soil-Water Environment in Southern China(Ministry of Education), College of Agricultural Sciences and Engineering, Hohai University, Nanjing, Jiangsu 210098, China; 2.Lianshui Water Conservancy Research Station, Huai′an, Jiangsu 223400, China
Abstract:To solve the problem of habitat degradation and fragmentation due to inappropriate design of irrigation and drainage ditch, the methods and practices of ecological design of irrigation channel were riviewed and analyzed from the aspects of constructing ecological revetment, habitat conditions and biological corridor. Studies have shown that the current research mainly concentrates on hydrophilic materials, the diversity of flow characteristics, the geomorphological features of water channel, soil bioengineering and ecosystem conservation. The related research and application in China is still in the star-ting stage. Based on the concept and functions of ecological channels, seven kinds of ecological restoration techniques are recommended to restore the damaged irrigation district ecosystem to a healthy status. The characteristics, advantages and disadvantages of these technologies are comparatively analyzed, and the hot issues and development direction of ecological design of irrigation channel are also proposed.
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