长江镇江段浅层承压水位特征及含水层边界类型识别  

Characteristics of shallow confined groundwater level and identification of aquifer boundary types in Zhenjiang section of Yangtze River

作　　者：周盈 李月 李洋 鄂建[1] 闵望[1] 陈添斐 ZHOU Ying;LI Yue;LI Yang;E Jian;MIN Wang;CHEN Tianfei(Key Laboratory of Ground Fissure Geological Hazards,Ministry of Natural Resources(Jiangsu Institute of Geological Survey),Jiangsu Nanjing 210049,China;China Institute of Geological Environment Monitoring,Beijing 100081,China)

机构地区：[1]自然资源部地裂缝地质灾害重点实验室(江苏省地质调查研究院),江苏·南京210049 [2]中国地质环境监测院,北京100081

出　　处：《上海国土资源》2023年第4期60-65,共6页Shanghai Land & Resources

基　　金：中国地质调查局环境监测院科研项目“国家地下水监测工程运行维护和地下水质监测(江苏省部分)”(0733-22171032/7);江苏地质勘查基金项目“江苏省地下水地质环境动态监测”(苏财资环[2021]46、[2022]27)。

摘　　要：基于江苏省国家地下水监测工程的长序列监测数据,采取互相关分析法和线性回归法研究长江镇江典型段浅层承压地下水位响应长江水位的关系,运用小波分析法解析地下水位时间序列的周期特征。结果表明:研究区4个站点的地下水位响应长江汛期变化,与长江水位相关性好,识别研究长江江段为水头边界;在2018—2022年的5年地下水位时间序列下,受2022年长江主汛期偏枯的影响,近长江站点的地下水位高低水位期的持续时间发生变化,高水位期时间减少1个月,低水位期增加1个月;离江岸最远站点的水位同比变化不能反映长江主汛期水位同比变化,站点的水位年振幅保持稳定,显示长江水位变化信号在浅层压含水层传播中出现了衰减与失真的现象。研究结果为地表水与地下水一体化调查与水资源联合调度提供了技术支持。Based on the long-term monitoring data of the National Groundwater Monitoring Project in Jiangsu Province,the shallow bearing capacity of the typical section of the Yangtze River in Zhenjiang was studied using cross-correlation analysis and linear regression methods.The relationship between groundwater level and Yangtze River water level is analyzed using wavelet analysis method to analyze the periodic characteristics of groundwater level time series.The results show that the groundwater levels of the four stations in the study area respond well to the changes in the Yangtze River flood season and have a good correlation with the water level of the Yangtze River.The identification and study of the Yangtze River section as the head boundary;In the 5-year groundwater level time series from 2018 to 2022,2022 is the year when the main flood season of the Yangtze River is relatively dry.The duration of the high and low groundwater level periods near the Yangtze River stations changes,with a decrease of one month in the high water level period and an increase of one month in the low water level period;The year-on-year change in water level at the farthest station from the riverbank cannot reflect the year-on-year change in water level during the main flood season of the Yangtze River.The annual amplitude of water level at the station remains stable,indicating attenuation and distortion of the Yangtze River water level change signal in the propagation of shallow confined aquifers.The research results provide technical support for the integrated investigation of surface water and groundwater and the joint scheduling of water resources.

关 键 词：长江镇江段 浅层承压水 地下水位 水力联系 含水层 边界识别 

分 类 号：P641.6[天文地球—地质矿产勘探] TV213.4[天文地球—地质学]