CAJ | 학술논문

本文对长江三角洲扬-泰-靖地区第四系松散层地下水中环境同位素(D、18O、34S)的分布特征进行了分析，旨在揭示大气降水、长江水、潜水及承压水之间的水力联系，辨别地下水中硫酸盐的来源及其污染状况。研究结果表明潜水含水层接受大气降水及长江水的补给，硫酸盐主要为农业污染来源或与海源硫酸盐的混合。承压含水层主要接受大气降水的补给，与潜水含水层及长江之间的水力联系较差，硫酸盐来源不同。在研究区顶部和沿江地段的浅层孔隙承压水中，硫酸盐来源于硫化物的氧化；在东部的深层孔隙承压水中，硫酸盐主要来源于硫酸盐岩的溶解或海源硫酸盐的滞留，基本未受到潜水或地表水中硫酸盐的污染。
본문대장강삼각주양-태-정지구제사계송산층지하수중배경동위소(D、18O、34S)적분포특정진행료분석，지재게시대기강수、장강수、잠수급승압수지간적수력련계，변별지하수중류산염적래원급기오염상황。연구결과표명잠수함수층접수대기강수급장강수적보급，류산염주요위농업오염래원혹여해원류산염적혼합。승압함수층주요접수대기강수적보급，여잠수함수층급장강지간적수력련계교차，류산염래원불동。재연구구정부화연강지단적천층공극승압수중，류산염래원우류화물적양화；재동부적심층공극승압수중，류산염주요래원우류산염암적용해혹해원류산염적체류，기본미수도잠수혹지표수중류산염적오염。
Distribution characteristics of environmental isotopes (D, 18O, and 34S) in groundwater of Quaternary loose soils were analyzed in Yangzhou-Taizhou-Jingjiang area to reveal the hydraulic connection between meteoric water, Yangtze River water, phreatic water and confined water, distinguish sources of sulfate in groundwater of different aquifers and identify the condition of sulfate contamination. According to the results obtained, phreatic aquifer is recharged from precipitation and Yangtze River, and sulfate originates from agricultural contamination or mixture of pollutants and marine sulfates; confined aquifers are mainly recharged from precipitation with poor hydraulic connection between confined aquifer and phreatic aquifer or Yangtze River, and sources of sulfate are different. In shallow confined water along the Yangtze River and at the top of the study area, sulfate originates from oxidation of sulfides; in deep confined water of the eastern area, sulfate originates mainly from dissolution of sulfate rocks or the retention of marine sulfates, with very insignificant contamination from sulfate of phreatic water or surface water.