滇池水环境质量综合评价指标优选

Index Optimization for Comprehensive Evaluation of Water Environmental Quality in Dianchi Lake

在研究2000—2014年滇池流域水污染排放的时空变化、水环境质量时空变化和生态环境时空演替基础上,结合滇池目前水环境质量监测工作要求,采用模型计算、指标特性分析、专家调查等方法,筛选出36个评价指标,分别表征滇池水环境质量的物理、化学、生物、营养、重金属、有机污染等特性,将滇池湖体4个监测点位优选出的评价指标监测数据输入水生态健康评价系统。结果表明,优选指标和评价体系能全面、准确、宏观地反映滇池水环境质量状况。将滇池评价指标由现有的94个压缩至36个,极大节省人力、物力,且更符合滇池水环境特点。

This study mainly investigated the temporal and spatial variation of water pollution discharge,water environmental quality and ecological environment in Dianchi Lake in 2000—2014,and also considering the current monitoring requirements of the water environmental quality standards,36 evaluation indexes were screened based on the model calculations, index characteristics analysis and expert consultations, etc. Those indexes demonstrated respectively the physical, chemical,biological,nutritional,heavy metal,and organic pollutant of water environmental quality in Dianchi Lake. To further demonstrate the feasibility of this evaluation system,the data of four samples taken from different locations of Dianchi Lake have been validated. The results showed that optimized standards and the constructed evaluation system could completely and accurately reflect local water environmental quality conditions. This study compressed the number of Dianchi Lake evaluation indexes from94 to 36,which helps to save significant human resources,materials cost,and more accurately reflect the water environmental quality characteristics of Dianchi Lake.