基于指标协调性的水体富营养化状况的模糊识别

在湖泊富营养化评价指标体系中，同一指标的分级界点值差异很大，近似地呈现几何级数变化，同时各指标权重的选择与内涵存在不确定性，基于这两种认识，构建基于指标协调性和模糊权下的湖泊水质评价模型。对评价标准及待评价水质监测值进行对数变换，运用层次分析法求出指标的模糊权重；以此构造隶属函数，按最大隶属原则来评判地表水质量等级。应用此模型对巢湖西半湖水体进行富营养化识别，得出结果与生态评估结果基本一致。

Fuzzy Pattern Recognition to Water Trophic Grade in Chao Lake Base on Coordination and Fuzzy Weight

There were great differences among the boundary data of the same indicator in the evaluation index system of lake eutrophication,and values of boundary data increased nearly in geometric progression.In addition,uncertainty emerged in weighted selection and meaning of indicators.Based on the above consideration,a model was established for evaluation of lake quality based on coordination and fuzzy weight among Indicators.Logarithmic transformations were taken on both the boundary data of the standard and the ...