A review of ecological restoration techniques in fluvial rivers |
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| Institution: | 1. Changjiang River Scientific Research Institute, Wuhan 430010, China;2. Col aborative Innovation Center for Geo-hazards and Eco-Environment in Three Gorges Area, Yichang 443002, China;3. State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China;4. State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China;5. China Railway Wuhan Survey and Design Co., Ltd., Wuhan 430074, China;6. Changsha University of Science& Technology, Changsha 410004, China |
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| Abstract: | Rivers play an important role in people's living and agricultural production, however, intense human activities have broken the original ecological balance, and affected structures and functions of the river ecosystem. To restore the damaged river ecosystem back to a healthy status, effective ecological restoration measures need to be implemented. The main problems that the damaged rivers face are either the locally altered hydrological processes affected by construction of hydraulic facilities, or the deterioration of water quality resulted from pollution emissions, or both. In this study, ecological restoration techniques of the rivers affected by engineering control or pollution are reviewed respec-tively. In addition, three kinds of methods, i.e. physical, chemical and biological–ecological methods are introduced in details for the rivers affected by water pollution. At present, the development of river restoration techniques shows the following trends: 1) the scale of ecological restoration is becoming larger; 2) ecological restoration measures are required to meet multiple objectives; and 3) the man-agement of water environment is changing from water quality management to aquatic ecosystem management. |
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| Keywords: | Ecological restoration Engineering control Pollution River Review |
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