Ecological Fragility Evaluation Of Water Sources Protected Areas Of Dalian City And Ecological Compensation Mechanism Research

Regional ecological fragility evaluation is one of the important contents in recognizing regional ecological environment condition, which mainly consist of natural and social-economic factors. Under the background of natural factors, disturbance of social and economic factors shows development trend of deterioration. Objective and accurate evaluation of regional ecological fragility and establishment of relevant ecological compensation mechanism have tremendous significance in effective protection of regional ecological environment and sustainable development. This paper uses water sources protected areas of Dalian City as the experimental site and considers the impact of administrative regionalization on environmental governance and management of water sources protected areas. The experimental site is divided into five independent evaluation units (marked by G1-G5). 10 representative affective factors (including 6 natural indexes and 4 social-economic indexes) are chosen to establish evaluation indicator system in the natural and social-economic two aspects. The analytic hierarchy process is used to determine the weights of total indexes. Ecological fragility is comprehensively evaluated through the calculation of ecological fragility index and grade division. The following important conclusions are:(1) Ecological fragility of water sources protected areas of Dalian City mainly shows slight fragility, general fragility and comparative fragility, the respective area is 1569 km~2,2092 km~2 and 698 km~2, the area of general fragility and comparative fragility are relatively larger and it is 2790 km~2, accounting for 64% of the total area. The results show that total ecological fragility of the experimental site ranges from general fragility to comparative fragility condition.(2) Ecological fragility index of G1 (included by Zhuanghe City) is slight fragility in water sources protected areas of Dalian City and the area is 1569 km~2, accounting for 36% of the total area; Ecological fragility index of G2 (included by Pulandian City), G3 (included by Gaizhou City) is general fragility and the area is 2092 km~2, account for 48% of total area; Ecological fragility index of G4 (included by Xiuyan County), G5 (included by Wafangdian City) is comparative fragility and the area is 698 km~2, account for 16% of total area.(3) From perspective of spatial distribution, the slight fragility region is located in the southeast of water sources protected areas. General fragility regions are located in the northwest and the south of water sources protected areas. Comparative fragility regions are located in the southwest and northeast of water sources protected areas.The results of evaluation indicates that environmental condition of water sources protected areas of Dalian City is not optimistic, facing the challenge of natural and social-economic factors such as ecological destruction, environmental pollution and human disturbance and so on. Therefore, based on the theory and achievement of foreign and internal ecological compensation mechanism, effective ecological compensation mechanism of water sources protected areas of Dalian City should be tried to establish according to compensation subject and object, standard, methods, ways and measures in ecological compensation.