Risk comprehensive evaluation of water supply in middle and lower reaches of Hanjiang River after implementation of middle route of South-to-North Water Diversion

After running the middle route of South-to-North Water Diversion, the quantity and process of water from Danjiankou Reservoir will be decreased and affected, which will inevitably lead to weaken the capacity of water supply to the middle and lower Hanjiang River. It is essential to evaluate the water supply risk in this basin and arrange auxiliary project with optical scale and layout in order to guarantee sustainable development in both water head region and water supply region. Firstly,several risk indexes of water supply are proposed.Secondly,every index relative right is confirmed by application of the analytic hierarchy process; and a comprehensive evaluation model is proposed to measure and assess the water supply risk .Finally,this article integrates several risk indexes to evaluate the risk of the water supply system in the middle and lower Hanjiang River.