中文摘要：

过去数十年来，江苏南通地区地下水水化学特征发生了较大的变化。为探明其水化学演化及时空变化规律，对南通地区地下水开展了野外调查取样及水化学测试分析，并利用Surfer8.0软件绘制出研究区域内浅层和深层地下水TDS、Cl-等值线图。研究结果表明，该区的浅层地下水含水层和深层地下水含水层属于不同的地下水循环系统。水化学显示2001~2007年间地下水咸化程度达到最高峰，全区咸化情况普遍严重；在空间上，总体浅层地下水由中西部内陆向东部沿海逐渐由淡水变为微咸水、咸水，西北部远海地区和中部南通地区地下水水质较好，咸化较严重的区域主要集中在东部沿海尤其是东南角沿海和海晏镇一带。

英文摘要：

During the past several decades, hydrochemical characteristics of groundwater aquifers in Nantong city of Jiangsu province has changed significantly. Groundwater chemistry analysis was carried out for samples collected in different areas and aquifers, and contour map of TDS and Cl- of deep and shallow aquifers were obtained by surfer 8. 0 software. The results indi-cate that shallow and deep aquifers in this area belong to different groundwater circulation systems respectively. In particularly, salinization deteriorated to the worst in the years during 2001 to 2007 and salinization is serious in all the area. Spatially, ground-water qualities in the shallow aquifer changed gradually from fresh to brackish and/or saline from western and central part that is far away from coastal area to the eastern coastal region. Serious salinization due to seawater intrusion mostly occurs in eastern coastal zone especially in Haiyan area and southeastern coastal regions.