1986～2006年巩义市回郭镇地下水污染时空变化分析

依据1986～2006年地下水监测数据,分析了20年来巩义市回郭镇地下水污染的时空变化。结果显示:在监测的23种污染物中,总固体、总硬度和硝酸盐超标率较高,六价铬和氟化物居中,挥发性酚较低。超标项目均分布在浅水区,岭地深水层污染较轻,形成南北岭滩分布格局。硝酸盐和六价铬污染指数每年下降2.61%和4.66%,总固体、总硬度和氯化物分别下降1.62%、1.85%和1.96%,此结果显示着回郭镇地下水污染向着逐渐减轻的方向变化。

Space-time change analysis of groundwater pollution in Huiguo Town,Gongyi City from 1986 to 2006

According monitored date of groundwater quality from 1986 to 2006,the space-time changes of groundwater pollution was analyzed in Huiguo Town,Gongyi City for 20 years.The results showed that：The 23 species in the monitoring of pollutants,total solids, hardness and nitrates was having a higher standard rate,hexavalent chromium and fluoride were in center,volatile phenol were in lower; Superscalar projects were located in shallow water,deep- layer ridged to less contaminated,there were distribution pattern of a north-south ridge beach;Nitrate and hexavalent chromium pollution index fell at 2.61%and 4.66%,total solids,total hardness and chloride fell 1.62%,1.85%and 1.96%,the results showed that the groundwater contamination Tuiguo Town toward the direction of a gradual change mitigation.