武威市集中式饮用水源地水质空间分异规律

Spatial variation regulations of water quality for centralized drinking water source in Wuwei City

基于2013年16个地表地下水水源地监测断面水质实测资料,应用系统聚类R型主因子分析法和Ward法对武威市平原区集中式饮用水水源地水环境空间分异规律进行研究.结果表明:武威市平原区饮用水源地水质污染存在从北向南逐渐转移的趋势.2013年5月16个地表地下水监测断面水质污染从北边(西渠镇致祥供水站Bb5)向中部(校东桥Aa6、扎子沟Aa7)转移;2013年8月水质污染从中部(三雷镇新陶供水站Bb3、扎子沟Aa7)向南边(上坝水厂Ba5、南营水库Aa5)转移;其中主要污染物指标包括硝酸盐氮、高锰酸盐指数、氯化物、挥发酚、总大肠菌群、硫化物、硒、总硬度8项水质指标.研究结果可以对石羊河流域功能区的划分与该区域饮用水源地水环境综合治理提供依据.

Based on the measured data of the water quality of 16 monitoring sections in the surfaceground water source in 2013,the hierarchical clustering R-typed factor analysis method and Ward method were used to analyze the spatial heterogeneity laws of the water environment in the centralized drinking water source in the plain terrain of Wuwei City. The results show that the contamination in the drinking water source in the plain terrain of Wuwei City tends to transfer from north to south. The water pollution of 16 monitoring sections in the surface-ground water source in May 2013 tends to transfer from north( Bb5) to middle( Aa6,Aa7). The water pollution in August 2013 tends to transfer from middle( Bb3,Aa7) to south( Ba5,Aa5). The main pollutants include: NO3- N,permanganate index,chloride,volatile penols,total coliform group,sulphide,Se,and total hardness. These data could pro-vide the basis for both the division of the functional district and the comprehensive control of the water environment in this area.