利用平原河网DO变化特点确定点源污染

水质监测与3S技术的结合产生了基于GIS背景数据支撑的纵向连续水质监测方法,它能够用于水质条件在时间、空间上都快速改变且污染严重的城乡结合部河道对点源污染和面源污染进行确定和评估。本文采用外业纵向连续水质监测结合内业GIS背景数据整合分析方法,对温瑞塘河支流--划龙桥河进行了典型案例研究。研究显示,对于平原型水库型河网DO值陡降处对应污染点源、DO值陡降率与点源排污量线性相关,采用连续纵向水质监测方法能够有效确定和评估流域点源性污染。

Using characteristics of the DO change to identify of point source pollution in plain river networks

Water quality monitoring method with the combination of 3S technique produce on-board real-time water quality monitoring method which based on GIS data. it can be used for temporal and special variation of water quality .Even more it is also used to identifying and evaluating of point source pollution in serious pollution river of transition zone between city and countryside. Based On the field on-board real-time water quality monitoring method with the combination of inside GIS data integration analysis method, It is typical to choosing the tributary of Wen-Rui Tang River -Hualong Qiao as the subject. This study suggests that the DO value descends abruptly corresponding to the point source pollution position . This study also suggests that the rate of DO value descends abruptly was linearly correlated with point source emission ,and it can be useful to identify and assess watershed point source pollution using on-board real-time water quality monitoring method.