用模糊综合评判法分析长江引水对大运河镇江段水质的改善作用

Effect analysis of water diversion from Yangtze River for water quality improvement in Zhenjiang section of Grang canal by fuzzy comprehensive judgement method

由于水污染物的大量排放,近几年来,大运河镇江段遭受到了严重污染,因而调引江水对大运河镇江段进行冲污释污便成了改善大运河镇江段水质的一项常用的措施。为了解此项措施实施后的效果,本文采用模糊综合评判法对大运河镇江段调引江水前后的水质状况进行了评价。该评价方法解决了水质评价中污染程度界线的模糊性问题,从而使得评价结果更具合理性和可信度。根据评价结果中各监测断面调引江水前后水质级别的变化情况,可以判定调引江水对大运河镇江段水质具有明显的改善作用,因此,可作为保护大运河镇江段水环境的有效措施。

Since large quantlty of water pollutants was discharged in last years,Zhenjiang section of Grand Canal suffered serious pollution.So it becomes a commonly improving measure to the water quality of Zhenjiang section of Grand Canal that dilute and wash away the water pollutants by water diversion from the Yangtze River.In order to understand the effects of this measure,by using fuzzy comprehensive judgment method,the water quality of Zhenjiang section of Grand Canal before and after water diversion was appraised.This evaluation method can solve the fuzziness problem of the pollution degree boundary in the water quality assessment,which made the evaluation results more reasonable and reliable.According to the change of water quality in each monitoring section,it can be determined that water diversion from Yangtze River has obviously improved the water quality in Zhenjiang section of Grand Canal.Therefore,it can be used as an effective measure to protect the water environment of Zhenjiang section of Grand Canal.