The Ecological Security Assessment Of Eric Lake Based On DPSIR Model

Eric Lake is the only lake in Karamay.Quality of its ecological environment have a direct impact on the local economy sustainable development.Based on the data from the field and the one the existing water quality data,using the single factor evaluation method and comprehensive nutrition index method to evaluate Eric lake water quality,it can be seen from the single factor evaluation results in the past three years,Eric lake the overall water quality for Ⅲ of water.As can be seen from the eutrophy:nearly three years,Eric comprehensive nutrition index in nutrient levels in the lake,and has a trend to light eutrophication.The paper based on lake health as the main body,use the "driving force-impact pressure-state-response"(DPSIR)model,it is in process comprehensive evaluation of Eric lake ecological security.In ecological safety comprehensive assessment,by using grey relation method, entropy weight method,analytic hierarchy process(ahp),three methods of safety assessment index system of the weight of each index in the index layer are calculated and to get the weight value of three groups were analyzed,lastly,the entropy weight method for assessment of the ecological security index layer index for weighting method.Layer calculated by the get the weight value of indexes scores and weight of the index layer to plan,plan layer score,Eric lake ecological security index ESI finally obtained.By scoring index layer and ecological security index ESI can be concluded that for nearly three years, "social economy" index showed a trend of increased year by year, "services" index change is not big, "regulation" index decline trend; "Ecological health" indicators present a small decline.But,although in the evaluation of ecological security index 3 years in a safe state,but with the social and economic pressure increase year by year,regulating the management ability of may by the state into a general state.In order to prevent Eric lake lake ecological security situation in decline,according to Eric lake ecological security situation and puts forward some countermeasures of ecological security to ensure that the lake ecological health status in safey or more safty.