灌区生态系统健康二级模糊综合评价模型及其应用

传统灌区的不合理建设给灌区内生态环境造成了很大影响，因此需要一种新的生态型灌区建设模式来指导灌区可持续发展。该文探讨了灌区生态系统健康的内涵，并根据灌区生态系统健康的内涵和指标筛选原则，选取相互独立且反映灌区生态系统结构属性、环境要素、功能要素及社会经济要素4个方面的典型敏感指标，组成灌区生态系统健康评价指标体系，提出了由层次分析法和模糊数学理论相结合的二级模糊综合评价法，构建出灌区生态系统健康的评价模型。并用此评价北京市北野厂再生水灌区的生态系统健康性。结果表明：模型很好的表征了北野厂再生水灌区生态系统健康疾病的现状。现模型能较好地评价灌区生态系统健康状况。

Secondary fuzzy comprehensive evaluation model for ecosystem health of irrigation district and its application

The unreasonable development of traditional irrigation district has an adverse effect on the ecosystem environment. Therefore, a new ecological model of irrigation district is needed urgently to meet the requirement of the sustainable development of irrigation district. In this paper, the connotation of the ecosystem health of irrigation district was studied. According to the connotation of the ecosystem health of irrigation district and the principle of index selection, four independently typical sensitivity indices were adopted in order to develop an evaluation index system of ecosystem health of irrigation district. The four indices included the structure attribute, the environmental element, the integrated function element and the social and economical element of ecosystem of irrigation district. A secondary fuzzy comprehensive evaluation method based on the integration of analytic hierarchy process and fuzzy mathematics was used to develop an evaluation model of ecosystem health of irrigation district. The model was applied in the Beiyechang reclaimed water irrigation district in Beijing. Results showed that the model reasonably well represented the status of ecosystem health of Beiyechang reclaimed water irrigation district. Thus the model can evaluate ecosystem health of irrigation district.