基于连续小波—互相关分析的降雨—地下水水位动态响应特征研究——以贵阳岩溶盆地为例  

Response characteristics of groundwater level dynamics to precipitation based on continuous wavelet-cross correlation analysis:A case study of the Guiyang karst basin

作　　者：汪莹 宋小庆 王飞 彭钦 曹振东 蒲秀超 WANG Ying;SONG Xiaoqing;WANG Fei;PENG Qin;CAO Zhendong;PU Xiuchao(111 Geological Brigade of Guizhou Geological and Mineral Exploration and Development Bureau,Guiyang,Guizhou 550008,China;Guizhou Geological Engineering Investigation,Design and Research Institute Co.,Ltd.,Guiyang,Guizhou 550008,China;School of Environmental Studies,China University of Geosciences(Wuhan),Wuhan,Hubei 430078,China;Guiyang Public Transport Investment and Operation Group Co.,Ltd.,Guiyang,Guizhou 550081,China)

机构地区：[1]贵州省地质矿产勘查开发局111地质大队,贵州贵阳550008 [2]贵州地质工程勘察设计研究院有限公司,贵州贵阳550008 [3]中国地质大学(武汉)环境学院,湖北武汉430078 [4]贵阳市公共交通投资运营集团有限公司,贵州贵阳550081

出　　处：《中国岩溶》2024年第4期843-853,共11页Carsologica Sinica

基　　金：贵州省省级科技计划项目资助(黔科合支撑[2022]一般210);贵阳市公共交通投资运营集团有限公司科研项目(GD3-FW-YJ-03-2020-11-ZB);黔地矿科合[2020]2号。

摘　　要：为探究降雨影响下的岩溶盆地地下水位动态的时空变化,选取2007-2021年贵阳岩溶盆地7个地下水位动态观测点不同时段观测资料以及降雨数据,采用小波分析及互相关分析对贵阳岩溶盆地地下水位动态的多时间尺度特征及其对降雨的响应进行分析。结果表明:(1)贵阳岩溶盆地地下水水位动态存在显著的256~512 d的主振荡周期。(2)贵阳岩溶盆地地下水位动态对降雨的响应滞后性明显,总体表现为地下水径流路径越长,地下水水位对降雨的响应越滞后。其中径流-排泄区地下水水位对降雨的滞后时间为2.66~7.7 d,排泄区的滞后时间为1.25~8.04 d。研究区内两个地下水系统的区域水文地质条件不同,因此南北两个地下水系统对降雨响应的滞后性存在差异。南部地下水系统从径流-排泄区至排泄区地下水对降雨的响应滞后性逐渐增强。北部地下水系统,径流-排泄区域受上游远距离降水补给的影响,地下水位变化较多源补给的排泄区更为滞后。Precipitation is the main source of water supply for most groundwater systems;therefore,its spatiotemporal distributions will,to some extent,determine the dynamic characteristics of groundwater levels.Hence,conducting research on groundwater level dynamics is of great significance for the sustainable development and utilization of groundwater resources,regulation and management of surface–groundwater resources,and determination of floating resistance and anti-floating water levels in engineering construction.The Guiyang karst basin is located within the construction scope of the main urban area of Guiyang City.In order to further understand the nonlinear process of groundwater level dynamics in the karst basin area,and help improve the management of groundwater resources in this area,we collected the observation data and precipitation data of seven observation points of groundwater levels in the Guiyang karst basin in different periods from 2007 to 2021.Besides,to analyze the groundwater level dynamics on different time scales and the response of the dynamics to precipitation in the Guiyang karst basin,we adopted the continuous wavelet analysis that can quantitatively judge the periodicity of precipitation and groundwater levels,and the correlation analysis that can quantitatively calculate the lag relationship between groundwater and precipitation.The results show as follows.(1)According to the groundwater level data from monitoring holes in the study area,the water level variations of the monitoring holes located inside the Guiyang karst basin is relatively small,with a maximum annual water level variations of about 2–7 m,because this basin,featuring relatively flat terrain,is a discharge area of the groundwater system.The edge of the Guiyang karst basin is controlled by the terrain and topography,with significant undulations.The water levels of monitoring holes located at the edge of the basin vary greatly,with the maximum variations of water level about 10–20 m over the years.In terms of the continuous

关 键 词：小波分析 互相关分析 地下水位动态 岩溶盆地 

分 类 号：P641.2[天文地球—地质矿产勘探]