中文摘要：

按照《地面水环境质量标准GB3838-2002》将河口湿地评价等级划分为5级，采用了模糊分布曲线中的“梯形分布”确定各个元素的隶属函数，依据各污染物的超标情况选取评价因子和确定权重，利用模糊变换原理和最大隶属度原则确定评价等级，构建了河口湿地水环境质量模糊综合评判的数学模型。并以辽宁省双台子河口湿地为例进行了实例计算与分析，结果表明：双台子河口湿地的水环境质量评价结果为Ⅳ，水环境质量污染较为严重。

英文摘要：

The evaluation grade of estuarine wetland is divided into 5 levels with the reference to the ＂STANDARDS OF SURFACEWATER ENVIRONMENT QUALITY GB3838-2002＂. Membership function of each element is determined by＂ trapezoidal distribution＂which is used in the fuzzy distribution curve. Based on the over standard condition of the pollutant select evaluation factor and weight, using fuzzy transformation and maximum membership degree law, evaluation grade was determined and a fuzzy comprehensive evaluation model was developed for water environmental quality evaluation of estuary wetland, and then the water environmental quality of shuang tai-zi estuarine wetland was evaluated as an example for demonstration. The conclusion showed that shuang tai-zi estuarine wetland water quality grade was Ⅳ, The water environment quality was bad.