Study Of Chongqing Karst Ecological Security Evaluation Based On DPSIR Model

The development of world economy and human activity scope, increasing the deterioration of the environment, ecological environment security has gradually become the focus of human attention. Become the research focus of the field of ecological environment of global each country and region. The ecological security evaluation is a key step to solve the problem. Carbonate rock in southwest area of China, karst area, along with the development of agriculture and industry and city construction. Highlight the many environmental problems, the karst rocky desertification intensifies, infiltration of surface water, soil, low coverage, soil loss completely. These problems seriously threaten the karst areas of industrial and agricultural production. In this paper, based on the present status of karst ecological environment in Chongqing city as the research background, the administrative county as basic assessment unit (not including Yuzhong District, Jiulongpo District, Shuangqiao District), research on security quantitative evaluation of karst ecological environment in the city. Research shows that the comprehensive index of ecological environment security for a minimum of37.65, maximum of56.01comprehensive index. Maximum and minimum value difference between, security condition change significantly, and presents the characteristics of regional distribution. Almost keep pace with the economic development level. Then the ecological environment comprehensive security index is divided into5warning level, safety zones only5areas, the total area of the study area9.93%. While the District of karst ecological environment the most unsafe heavy district and18counties, the total area of the70.09%district. Finally discusses the methods and policies to solve the karst ecological environment problems.This paper uses the D-P-S-I-R model, analysis of ecological environment of the karst in Chongqing City, the safety evaluation index system of Chongqing City, the karst ecological environment. To formulate specific evaluation approach, using the basic idea of AHP selected44representative index systems to determine the weight of each factor. To calculate the comprehensive ecological security index in Chongqing city in37districts and counties, and sort. Based on the entropy method to determine weights were compared by AHP evaluation method, in accordance with the actual situation of the karst ecological environment. The calculation results show the karst ecological environment security in Chongqing and the level of economic development. Especially in minority population comprehensive index is not optimistic. Comprehensive index below44.73have18districts and counties. These counties are mostly distributed in the relatively slow economic development of the wing area.The comprehensive index of karst ecological environment in this study were calculated by AHP method as the foundation of the research area is divided into five levels, respectively, with heavy police (41.23), the (44.73), warning (48.46), a safety (52.73) and (56.01) said. The division of the security warning level is to determine the position of the evaluation of karst ecological environment security unit of the state, in order to facilitate the comparison research, gaps, clearly the future direction of the development of karst ecological environment. Division results show from security to heavy police contained in the evaluation of administrative regional number decreased gradually, and the total area is increasing in. Security zones only5, area8126.06km2, and heavy district has8, area28744.18km2; safety area per capita GDP is31871.60yuan, but the heavy police per capita GDP for9684.25yuan, so the same and the development of the economy, from the security zone to district karst ecological environmental security gap is big.The Related karst ecological environment safety evaluation studies, This paper tries to further explore and perfect the karst ecological environment safety evaluation theory. At the medium scale system on regional karst ecological security were studied. Choose the D-P-S-I-R model, specification karst ecological environment safety evaluation index system and method. In ought to the future karst ecological environment safety evaluation to provide some ideas and methods. In order to provides the beneficial references for management decision-making for the related departments in the environmental managers.