基于同位素水化学分析的松嫩平原大布苏湖流域地下水补给源研究  

Study of recharge source of Dabusu Lake in Songnen Plain based on isotopic and hydrochemical analysis

作　　者：张文卿[1] 陈建生[2] 姜淑坤 徐燚[2] 

机构地区：[1]吉林大学环境与资源学院,吉林长春130021 [2]河海大学岩土工程研究所,江苏南京210098 [3]吉林省水文水资源局,吉林长春130021

出　　处：《水资源保护》2017年第1期9-14,16,共7页Water Resources Protection

基　　金：国家自然科学基金(51578212);吉林省水利厅原始创新项目(吉林省西北部深循环地下水补给径流排泄量调查研究)

摘　　要：采用同位素与水化学分析方法研究了大布苏湖湖水的补给源,结果表明,大布苏湖水主要来自地下水的补给。大布苏湖水、地下水与松花江中游的江水同位素δ2H-δ18O关系点分布在相同的区域,且受到了一定程度的蒸发。泉水中的氟-砷关系表明,补给湖泊的地下径流主要发生在20~30m的粉细砂层,火山岩风化物细颗粒沉积层构成了主要的透水层,火山岩细颗粒中的砷通过氧化还原反应溶解到地下水中,形成了高砷含水层。据此推断,大布苏湖水来自于松花江等周边河流的渗漏,渗漏水通过黄土层下伏的高砷粉细砂层向大布苏湖中排泄。湖心钙华表明同时存在深层承压水的越流补给。The recharge source of Dabusu Lake was investigated through isotopic and hydrochemical analysis. The results show that Dabusu Lake was mainly recharged by groundwater. δ2 H-δ18 O curves for the lake water, groundwater, and river water in the middle reaches of the Songhua River occurred in the same zone, and the water evaporated to a certain extent. Analysis of the relationship between fluorine and arsenic in the spring water shows that the subsurface runoff that recharged the lake mainly occurred in the fine sand layer 20 m to 30 m under the surface. The volcanic weathering fine particle deposited layer composed the main percolation layer. Arsenic in the volcanic fine particles was dissolved in the groundwater through oxidation-reduction reaction, and an aquifer with a high concentration of arsenic was formed. On these bases, it can be inferred that the lake water comes from the seepage of the Songhua River and surrounding rivers, and the seepage water flows through the fine sand layer with a high concentration of arsenic and then discharges into Dabusu Lake. The travertine in the lake center indicates that there is also leakage recharge of deep confined water.

关 键 词：地下水 同位素分析 水化学分析 氟 砷 补给源 大布苏湖 

分 类 号：P641[天文地球—地质矿产勘探]