Evaluation Of Water Resources Sustainable Utilization In Typical Karst Valley Under Fragile Ecology Restriction

Eco-environmental fragility and water shortage in karst area restrict the development of society and economy. So we must lucubrate the sustainable utilization of water resources under fragile ecology restriction. Evaluation of sustainable utilization of water resources in typical karst valley is one of the important measures on ensuring sustainable development in karst area. The paper applies principle of systems engineering and thought of sustainable development, integrates principle eco-hydrology, discusses indexes and weightings of water resources sustainable utilization evaluation, and establishes a karstical evaluation system of water sustainable utilization. There are some important conclusions as follows:Firstly, discussed water resources system, retrospected the history of water resources evaluation, sumed up seven shortages about evaluation of water resources sustainable utilization, and the evaluation of water resources sustainable utilization in karst area is one innovation in this paper.Secondly, summarized water resources in karst area further. Actuality, mechanism and characters of eco-environmental fragility in Guizhou karst area were analyzed deeply according to achievement of predecessor, discussed the coupling relationship between water resources utilization and eco-environment, and brought forward that water resource sustainable utilization is an effective measure of harmonizing water resources and eco-environment.Thirdly, probed into connotation of water resources sustainable utilization, established the principle of erecting evaluation system, analyzed the methods of water resources evaluation, and erected evaluation system according to karst particularity, including: aim-layer,rule-layer and index-layer.Fourthly, Indexes were filtrated by frequency statistics method,theory analysis method and expert consultation method. Weighting was evaluated by Improved Analysis Hierarchy Process. Evaluation index grade was compartmentalized and sustainable development ability was classified to five grades: very bad,bad,common,good and very good. Established the evaluation matrix according to relative membership grade and work out result by fuzzy synthetic judgment.Fifthly, designed the fuzzy synthetic judgment process using Visual Basic6.0, achieved "new" program and "edit" program, and advanced the efficiency of evaluation.Sixthly, put up the evaluation of water resources sustainable utilization in guizhou puding houzhai valley including: higher reaches,middle reaches and lower reaches.Seventhly, put forward issue,model and countermeasure of water resources sustainable utilization in typical karst valley under fragile ecology restriction, offered basis for exploiting water resources in reason, and facilitated regional sustainable development.