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In 2010 the first half of the year, water environment quality statistics of important River are that the Yangtze River main branch overall water quality is good. Ten big branches of the Yangtze River system, Dadu River, the Minjiang River, the Tojiang River, the Xiangjiang River and the Gan River water quality are good.The Gan River basin has the very big research superiority, the ecological environment quality is relatively good, but along with urban economy’s fast development, the industry, agricultural, the domestic water constant rise, the ecological environment has suffered the varying degree destruction, in sewage disposal’s nitrogen, the phosphorus content continue to increase, the water environment quality receives the varying degree the pollution, moreover the pollution degree presents the tendency which intensifies year by year.Yuan River is one branches of Gan River, the water environment quality changes for the better in recent years is more obvious, especially the city sector water quality had the radical change for the better, "the cyanogen, the phenol" the pollution was under the active control. Studied the rivers succession dynamic change, the rivers different degree of disturbance ecosystem, the healthy rivers for our country with contrast research and so on non-healthy the rivers to provide the very good scientific research platform.This research union domestic extra income environmental capacity’s research present situation, draws up take the Yuan river basin does as the example carries on the Gan River basin water pollution total quantity assignment present situation appraisal, the water environmental capacity assignment present situation appraisal and the water pollution control object of study.Through the present stage preliminary study result, forms the mechanism and the water environment evolution rule and the Gan River basin water environmental capacity in the Gan River basin water pollution, and so on the related findings foundation (Yuan river for instance), appraisal water pollution total quantity assignment present situation Gini’s coefficient, formulation basin water pollution total quantity allocative decision; In establishment basin water pollution total quantity control and basin socio-economic development level relations, safeguard basin environment, economical and society’s coordinated sustainable development; Take the control unit water quality improvement as the goal, the overall plan water resources use and the water environmental protection relations; Take the environment supporting capacity as the foundation, the implementation saving water strategy and the pollution government measure, realizes the pollutant total quantity control; Thus to further protect the Gan River basin good ecological environment and the water quality condition provides the theory basis.
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