生态环境学报Issue(6)：917-922,6.
基于集对分析与三角模糊数的滨海湿地生态系统健康评价
Assessment of coastal wetland ecosystem health based on set pair analysis and triangular fuzzy numbers
摘要
Abstract
Coastal wetland is an ecotone, formed by the interaction between sea and land, which is the most sensitive to environmental changes and human activities, and makes it become a relatively fragile ecosystem. Scientific evaluation of coastal wetland ecosystem health and its stress factors have important practical significance in restoration and sustainable development of wetland ecosystem. According to problem of uncertainty and fuzziness in wetland ecosystem system assessment, the Pressure-State-Response (PSR) model is used to establish assessment index system for coastal wetland ecosystem health. The weights of indexes are determined using the analytic hierarchy process (AHP). The set pair analysis method(SPA) is applied to depict the fuzziness of subordinate relation between the evaluation sample and grade classification standard. The triangular fuzzy numbers are used to express the continuous changing process and uncertainty of component coefficients of discrepancy degree. Moreover, a coupling method of set pair analysis and triangular fuzzy numbers for health assessment of coastal wetland ecosystem is established. The method is applied to current situation assessment of ecosystem health in Haixing wetland. The result shows that the comprehensive connection number of ecosystem health is-0.380 in Haixing wetland, and its corresponding grade characteristic value is 3.760, which can be categorized as a general sick level. The grade characteristic value of the pressure subsystem, the state subsystem and the response subsystem are 3.580, 3.976 and 2.948 respectively. It indicates that natural state of Haixing wetland have been excessively disturbed by human activities, which leads to system structural imbalance and the decline of the service function under the external stress. The main factors affecting the health of ecosystem system are the using intensity of pesticides, utilization ratio of water resources, degradation ratio of the wetland area, water eutrophication, proportion of environmental protection investment in GDP, consciousness of wetland protection, etc. The proposed model is simple and intuitive, and the result more objective and reasonable, and would be of reference value in assessing wetland ecosystem health.关键词
生态系统健康/集对分析/三角模糊数Key words
ecosystem health/set pair analysis/triangular fuzzy numbers分类
建筑与水利引用本文复制引用
彭涛,陈晓宏,王高旭,李英海,刘冀..基于集对分析与三角模糊数的滨海湿地生态系统健康评价[J].生态环境学报,2014,(6):917-922,6.基金项目
国家自然科学基金项目（51210013；51109138；41101511）；湖北省自然科学基金项目（2012FFB03802）；湖北省教育厅自然科学研究计划项目（Q2013167；Q20121301）；南京水利科学研究院水文水资源与水利工程科学国家重点实验室开放基金项目 （）
