汉中市地下水水质动态变化原因分析

Reason on Dynamic Changes of Groundwater Quality in Hanzhong City

以2004年-2008年汉中市城区12个地下水水质监测点的监测数据为依据，根据本区地下水水质特征，选取矿化度、总硬度、硝酸盐、氟化物、有毒有害物（挥发酚C6H5OH、氰化物CN^-、砷As、铬离子Cr^6＋、铅离子Pb^2＋、镉离子Cd^2＋、汞离子Hg^2＋）五项分析指标，按照国家《地下水质量标准》GB／T14848—93推荐的单因子评价法进行评价分析，得出五年间区内潜水及浅层地下水的动态变化趋势，最后提出对区内地下水污染的防治措施。

Based on the monitoring data of twelve groundwater quality points in Hanzhong urban districts during 2004 to 2008, five indexes of groundwater including salinity, totel hardness, nitrate, fluoride and toxic ＆ hazardous compounds （volatile phenol C6H5OH,cyanide CN^-, arsenic As, chromium ion Cr^6＋, lead ion Pb^2＋, cadmium ion Cd^2＋, mercury ion Hg^2＋） were chosen as analysis indexes in this article. According to the feature of groundwater quality, the dynamic changing trend in five years of the watertable and shallow groundwater were acquired by single factor evaluation method recommended by the Groundwater Quality Standard GB/T14848-93. Finally, the paper put forward some prevention measures for the groundwater pollution.