The Study On Evaluation And Renewal Of Ecosystem Health Of Hengshui Lake Wetland

Fully considering to the interrelated fundament of Hengshui lake wetland, the paper selects 24 indices from the ecological character, unitary function and the society-economy environment of the wetland, and consulting the indicator system for ecosystem health evaluation of wetland, the paper establishes the evaluation system which is suitable for Hengshui lake wetland. The paper calculates weight for each index by referring to the opinion of experts, calculates the heath level of Hengshui lake wetland and obtains the restricted factors of wetland health, by the model of multitudinous levels fuzzy comprehensive evaluation and the model of leading the concept of water safety degrees, and by the comparison to the evaluation standards of indices (Index standards measure off 5 grades: excellent, very health, health, common, common illness and illness). Finally the paper makes the comparison and conclusion to the two methods. In view of the evaluation results, this article puts forward the renewal measures of Hengshui lake wetland from five facets.