| 扬-泰-靖地区地下水系统水力联系与硫酸盐污染特征 |
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| 引用本文：李云,姜月华,周迅,贾军元,周权平,李云峰.2014.扬-泰-靖地区地下水系统水力联系与硫酸盐污染特征[J].地球学报,35(2):183-190. |
| DOI：10.3975/cagsb.2014.02.09 |
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| 基金项目:中国地质调查局地质调查项目(编号: 1212010340106; 121201063400; 1212010634404; 1212010914006) |
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| 中文摘要: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。 |
| 中文关键词:地下水 环境同位素 水力联系 硫酸盐污染 扬-泰-靖地区 |
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| Characteristics of Hydraulic Connection and Sulfate Contamination within the Groundwater System of Yangzhou-Taizhou-Jingjiang Area |
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| Abstract: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. |
| keywords:groundwater environmental isotopes hydraulic connection sulfate contamination Yangzhou- Taizhou-Jingjiang area |
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