Study On Water Environment Security And Evaluation Index System-a Case Study Of Beijing

Since the industrial revolution, it has been sharply growing for man to economy. Concomitantly, the urgent environmental questions are increasingly threatening man.It's well known that water is the most basic kind of demand for mankind's survival. After the 1970s,water crisis has attracted highly attention by all circles of society. Morever, conditions will be continuous: the shortage of water resource, the increasing of water disaster, the deterioration of water enviroment. Based on the position, this thesis puts forward the concept of Water Environment Security(WES) from Environment Security,and probing to how to evaluate it.At first, WES is put forward and explained. It means that the surrounding ecosystem and the development of social economy are sustainable on the basis of well water environment.After presenting the historical origins and basic connotation of index system for Sustainable Develepment, the dissertation establishes the index system for WES based on PSR. The system is consist of social system, ecology system and water environment system. Proportions are put by Analytic Hierarchy Process method and WES is evaluated by general index.On the basis of above, the thesis evaluates the actuality and history of WES in Beijing. Per capital water resources, ratio of water resources utilization, ratio of waste water to runoff percentage of polluted reaches andEngel have profound effect on WES. GDP per person, numeral in possession of advanced degree per ten thousand people, Per capital green areas, burden of fertilizer employed and ratio of groundwater up to water quality standards determinately impact WES. Percentage of devotion toenvironment in GDP, percentage of irrigated area accounting for plantation, ratio of urbanization, ratio of water and soil erosion controlled and ratio of industrialwastewater treatment have little impact on WES.Contraposing to the evaluation results and the problems while people utilizing water resource in Beijing,some advice are drawn to ensure water environment security in Beijing in view of technique means, law measure, management system, public consciousness and policy lead.