Correlating Groundwater Level Fluctuations of a Fractured Confined Aquifer With Relative Variations in Seismic Velocity: A Way to Estimate the Groundwater Storage

IF 4.6 1区地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY

Geophysical Research Letters Pub Date : 2025-04-05 DOI:10.1029/2024GL110808

B. Vittecoq, A. Burtin, J. Fortin

{"title":"Correlating Groundwater Level Fluctuations of a Fractured Confined Aquifer With Relative Variations in Seismic Velocity: A Way to Estimate the Groundwater Storage","authors":"B. Vittecoq, A. Burtin, J. Fortin","doi":"10.1029/2024GL110808","DOIUrl":null,"url":null,"abstract":"<p>Analysis of ambient seismic noise is of increasing interest for its potential to monitor aquifers, seismic wave velocity being sensitive to fluctuations of the water table or to pore pressure variations. The correlation with groundwater pressure variations in confined aquifers, which are often strategic, is an open scientific question, as is the stored groundwater volume. Based on an experimental site equipped with a low-cost seismometer located close to a borehole in a confined fractured aquifer, we demonstrate that (a) the auto and inter-components correlation of the time series of the seismometer enables detecting variations in seismic velocities, (b) these changes are negatively correlated with the groundwater pressure variations, and (c) these changes occur above a groundwater pressure threshold related to the fractures' properties. Finally, we propose a method to estimate the storage coefficient's order of magnitude of the confined aquifer using the correlation between <i>dv/v</i> and the groundwater pressure.</p>","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 7","pages":""},"PeriodicalIF":4.6000,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024GL110808","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Geophysical Research Letters","FirstCategoryId":"89","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1029/2024GL110808","RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"GEOSCIENCES, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

Analysis of ambient seismic noise is of increasing interest for its potential to monitor aquifers, seismic wave velocity being sensitive to fluctuations of the water table or to pore pressure variations. The correlation with groundwater pressure variations in confined aquifers, which are often strategic, is an open scientific question, as is the stored groundwater volume. Based on an experimental site equipped with a low-cost seismometer located close to a borehole in a confined fractured aquifer, we demonstrate that (a) the auto and inter-components correlation of the time series of the seismometer enables detecting variations in seismic velocities, (b) these changes are negatively correlated with the groundwater pressure variations, and (c) these changes occur above a groundwater pressure threshold related to the fractures' properties. Finally, we propose a method to estimate the storage coefficient's order of magnitude of the confined aquifer using the correlation between dv/v and the groundwater pressure.

Abstract Image

查看原文本刊更多论文

由于地震波速度对地下水位的波动或孔隙压力的变化非常敏感，对环境地震噪声的分析因其监测含水层的潜力而日益受到关注。封闭含水层通常具有战略意义，其与地下水压力变化的相关性以及地下水的储存量是一个未决的科学问题。我们在一个实验点上安装了一台低成本地震仪，该地震仪位于一个封闭断裂含水层的钻孔附近，在此基础上，我们证明：(a) 地震仪时间序列的自相关性和成分间相关性能够探测到地震速度的变化；(b) 这些变化与地下水压力变化呈负相关；(c) 这些变化发生在与断裂特性相关的地下水压力阈值之上。最后，我们提出了一种利用 dv/v 与地下水压之间的相关性来估算承压含水层储水系数数量级的方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Geophysical Research Letters 地学-地球科学综合

CiteScore

9.00

自引率

9.60%

发文量

1588

审稿时长

2.2 months

期刊介绍： Geophysical Research Letters (GRL) publishes high-impact, innovative, and timely research on major scientific advances in all the major geoscience disciplines. Papers are communications-length articles and should have broad and immediate implications in their discipline or across the geosciences. GRLmaintains the fastest turn-around of all high-impact publications in the geosciences and works closely with authors to ensure broad visibility of top papers.