Research On The Eco-environmental Problems And Rehabilitant Countermeasures In Manasi Irrigation Area Of Manasi River

China is a big agricultural country, and irrigation area is the main base and considerable support for regional economic development. Abundant Water resources and well water environment quality is necessary to the sustainable development in irrigation area. However, with the rapid growth of population and social economy and the increasing intensity of the natural resources, the development of irrigation area has been restricted by such ecological problems as water resources shortage, water quality deterioration and ecological decline, which were resulted from improper irrigation methods, urban development, and regional eco-system damage, etc. Ecological rehabilitation and improvement is bound to economic development and harmonious society construction.Based on quantitative studies about irrigation area constructions and researches at home and abroad, the important place of irrigation area in Chinese economic construction and the major eco-environmental problems faced by irrigation area were analyzed. The Manasi irrigation area of Manasi River with typical meaning was chosen to restore and research.Aimed at the increasing eco-environmental problems, including water shortage, water pollution, soil salinization, water loss and soil erosion, loss of function of the channel and river, biocenose degradation, etc, which severely infected the sustainable development for irrigation area, the main works in this paper are summarized as followed: constituting the measures of water resources shortages for developing agricultural water-saving technologies and adjusting agricultural structures; constructing the water polluting control and purification system of Mushroom lake: source control and decrement-sewage collection and treatment - channel ecological interception - wetland treatment -reservoir purification; putting forward the systematic projects for soil salinization and water loss and soil erosion of the integrated application of water conservancy agriculture and forestry.; constructing the ecological impervious channel model in west bank, from all of which theoretical bases and technical support for the eco-environmental rehabilitant in Manasi irrigation area were offered. All of these works were based on data collection, technical analysis, on-the-spot investigation, experimental research and technical development about Manasi irrigation area, etc.