The Heihe River basin

an inland-flow catchment and a very important base for grain

vegetable and economic crops

is one of the most affected areas by human economic activities.The water and land resources over exploitation of the middle reaches lead to a serious ecological problem at downstream.This has already threatened the safety of ecosystem within the whole basin.T he problem is mainly showed as zero -flow appears frequently

lakes dried up

groundwater table declined

area of forest decreased

lawns degradation seriously

land deserted and sand storm harms aggravated

etc.These environmental problems have been noticed diffusely by the government and public.The measure of water saving and distribution retionalization which are implementing within the basin is one of the primary ways for its environment protection.Harmonious development among population

resources and environment basinwide is very significant to maintain the stabilization of the border area

promote the progress of the society

and implement the strategy of the great exploiture of Western China.