涟水高沟地区承压地下水可更新性研究  

Study on renewability of confined groundwater in Lianshuigaogou area

作　　者：秦甜甜 黄晓燕[1] 胡晓雨[2] 李朗[1] 丁国辉 Qin Tiantian;Huang Xiaoyan;Hu Xiaoyu;Li Lang;Ding Guohui(Geological Survey of Jiangsu Province,Nanjing 210018,China;Water Resources Service Center of Jiangsu Province,Nanjing 210029,China;Nanjing Insititute of Surveying,Mapping&Geotechnical Investigation,Co.,Ltd.,Nanjing 210000,China)

机构地区：[1]江苏省地质调查研究院,南京210018 [2]江苏省水资源服务中心,南京210029 [3]南京市测绘勘察研究院股份有限公司,南京210000

出　　处：《工程勘察》2024年第1期34-40,共7页Geotechnical Investigation & Surveying

基　　金：2021年度江苏省自然资源科技计划项目(2021035);江苏省水利发展资金项目(2022年).

摘　　要：为合理开发利用和保护地下水资源,评价区域地下水可更新性成为当前首要解决的问题。本文从定性和定量两个角度进行分析研究,首先从区域水文地质条件与地下水水动力等方面,进行地下水系统划分及特征研究,分析含水层空间结构及补径排条件;其次在收集利用以往测试资料基础上,通过现场采样分析,开展不同水体环境同位素特征研究;最后利用水均衡法计算地下水可更新能力指标。研究结果表明:涟水高沟地区承压水具备地下水补给通道,主要接受上游山区侧向径流补给,且在开发利用过程中不会引发地面沉降等环境地质问题;地下水水龄2万年左右,水循环更新周期上千年,可认为其具有一定的更新能力,不属于难以更新的地下水;同时,地下水的合理开发利用有助于加快地下水循环速率,进一步提高地下水更新能力。In order to rationally exploit and protect groundwater resources,evaluating the renewability of regional groundwater is a primary problem to be solved.A qualitative and quantitative analyze and study was carried out in this paper.Firstly,from the regional hydrogeological and groundwater hydrodynamic conditions,the groundwater system division and characteristics were studied,and the aquifer spatial structure and recharge,runoff,drainage conditions were analyzed;and then based on the collected previous test data,the characteristics of environmental isotopes in different water bodies were studied through field sampling and analysis;finally,the index of groundwater renewability was calculated by water equilibrium method.The results show that there is a recharge channel for the confined groundwater in Lianshuigaogou area,which is mainly supplied by the lateral runoff of the upstream mountain area,and it will not cause environmental geological problems such as ground subsidence during the utilization process;the groundwater age is about 20000 years,and the water cycle renewal period is over 1000 years,and it is considered having the renewal ability and it is not difficult to renew;at the same time,the rational exploitation of groundwater will speed up the groundwater circulation rate and further improve the groundwater regeneration capacity.

关 键 词：地下水年龄 承压水可更新性 水动力条件 同位素分析 水均衡 

分 类 号：P641.8[天文地球—地质矿产勘探] S273.4[天文地球—地质学]