马关县南北河水质特征污染物变化及原因分析

Characteristic Pollutants Changes and Reasons Analysis of Water Quality in Nanbei River of Maguan

通过对文山州境内马关县出境河流南北河2006～2007年的水质监测数据进行评价分析，表明砷、氟化物为马关南北河水质的特征污染物。砷、氟化物的来源主要是天然背景值较高，加之水土流失及上游的非法洗选矿废水未经任何处理直接流入铜街大沟、那崩河后汇入南北河。

Water quality data of Nanbei river from 2006 to 2007 are assessed and analyzed. Arsenic and fluoride are the characteristic pollutants of the Nanbei river because of high natural background value, however, soil and water loss and illegal ore washing wastewater without any treatment on the upstream have become another mare sources.