Zixuan Qin , Jian Guo , Carlos H. Maldaner , Kenley Bairos , Qiang Xu , John A. Cherry , Beth L. Parker
{"title":"Using barometric response functions to estimate unconfined aquifer permeability changes caused by landslide: A case study in southwest China","authors":"Zixuan Qin , Jian Guo , Carlos H. Maldaner , Kenley Bairos , Qiang Xu , John A. Cherry , Beth L. Parker","doi":"10.1016/j.enggeo.2025.107950","DOIUrl":null,"url":null,"abstract":"<div><div>The formation and deformation of landslides lead to continuous variations in the stress-strain state of surrounding rock masses, consequently triggering alterations in aquifer properties. Continuously measuring landslide permeability is challenging, particularly in assessing aquifer properties without human disturbance under natural landslide-induced loads. In this study, continuous measurements of water levels were recorded in a multi-level well within the Kualiangzi landslide area, along with onsite logging of barometric pressures. Barometric response functions were then utilized to estimate the vertical pneumatic diffusivity of the unsaturated zone and the vertical hydraulic diffusivity of the unconfined aquifer for different time periods during the landslide. Slug tests were also conducted to verify permeability changes in the aquifer. Results indicated that in both the unsaturated zone and unconfined aquifer, permeability first increased and then decreased, ultimately doubling and rising 2.3 times, respectively, compared to initial values. The use of barometric response functions represents a novel approach for estimating permeability changes in landslide zones. Due to its cost-effectiveness and convenience, this method proves to be a favorable choice for detecting permeability changes in unconfined aquifers above the sliding surface. It contributes to providing further insights into landslide research.</div></div>","PeriodicalId":11567,"journal":{"name":"Engineering Geology","volume":"348 ","pages":"Article 107950"},"PeriodicalIF":8.4000,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Engineering Geology","FirstCategoryId":"89","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0013795225000468","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/2/9 0:00:00","PubModel":"Epub","JCR":"Q1","JCRName":"ENGINEERING, GEOLOGICAL","Score":null,"Total":0}
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Abstract
The formation and deformation of landslides lead to continuous variations in the stress-strain state of surrounding rock masses, consequently triggering alterations in aquifer properties. Continuously measuring landslide permeability is challenging, particularly in assessing aquifer properties without human disturbance under natural landslide-induced loads. In this study, continuous measurements of water levels were recorded in a multi-level well within the Kualiangzi landslide area, along with onsite logging of barometric pressures. Barometric response functions were then utilized to estimate the vertical pneumatic diffusivity of the unsaturated zone and the vertical hydraulic diffusivity of the unconfined aquifer for different time periods during the landslide. Slug tests were also conducted to verify permeability changes in the aquifer. Results indicated that in both the unsaturated zone and unconfined aquifer, permeability first increased and then decreased, ultimately doubling and rising 2.3 times, respectively, compared to initial values. The use of barometric response functions represents a novel approach for estimating permeability changes in landslide zones. Due to its cost-effectiveness and convenience, this method proves to be a favorable choice for detecting permeability changes in unconfined aquifers above the sliding surface. It contributes to providing further insights into landslide research.
期刊介绍：
Engineering Geology, an international interdisciplinary journal, serves as a bridge between earth sciences and engineering, focusing on geological and geotechnical engineering. It welcomes studies with relevance to engineering, environmental concerns, and safety, catering to engineering geologists with backgrounds in geology or civil/mining engineering. Topics include applied geomorphology, structural geology, geophysics, geochemistry, environmental geology, hydrogeology, land use planning, natural hazards, remote sensing, soil and rock mechanics, and applied geotechnical engineering. The journal provides a platform for research at the intersection of geology and engineering disciplines.
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