中文版 | English
Title

Impact of high-permeability preferential flow zones on pumping-induced airflow in unconfined aquifer

Author
Corresponding AuthorKuang, Xingxing
Publication Years
2023-03-01
DOI
Source Title
ISSN
0885-6087
EISSN
1099-1085
Volume37Issue:3
Abstract
When the unsaturated zone of the unconfined aquifer is covered by a low-permeability upper layer, significant airflow will be generated in the unsaturated zone during water pumping. However, high permeability preferential flow zones (PFZs) such as fractures and macropores are frequently present in the unsaturated zone, forming the preferential fluid flow paths, which may change the original airflow pattern in the unsaturated zone during the pumping test and consequently affect the precision of obtained aquifer hydraulic parameters. The main objective of this paper is to investigate the effect of PFZs in low-permeability upper layer on pumping-induced airflow in the unsaturated zone by numerical simulations of transient three-dimensional air-water two-phase flow and to quantify errors in the aquifer hydraulic parameters obtained during pumping test. The results demonstrate that a large amount of air flows quickly from the atmosphere into the unsaturated zone through the PFZs, and that the PFZs can draw some air from the nearby low-permeability soils as well. The significant influx of air through PFZs also reduces the negative air pressure in the unsaturated zone and decreases the drawdown in the saturated zone at intermediate times, which are nevertheless still greater than the results obtained in the homogeneous aquifer. Estimations of the aquifer hydraulic parameters reveal that errors of these parameters obtained are smaller when the PFZs with favourable combinations of permeability, width and quantities facilitate more air to flow into the unsaturated zone.
Keywords
URL[Source Record]
Indexed By
Language
English
SUSTech Authorship
First ; Corresponding
Funding Project
National Natural Science Foundation of China["92047202","91747204"]
WOS Research Area
Water Resources
WOS Subject
Water Resources
WOS Accession No
WOS:000950878300001
Publisher
ESI Research Field
ENVIRONMENT/ECOLOGY
Data Source
Web of Science
Citation statistics
Cited Times [WOS]:0
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/523906
DepartmentSchool of Environmental Science and Engineering
Affiliation
1.Southern Univ Sci & Technol, Sch Environm Sci & Engn, State Environm Protect Key Lab Integrated Surface, Shenzhen 518055, Peoples R China
2.Westlake Univ, Sch Engn, Key Lab Coastal Environm & Resources Zhejiang Prov, Hangzhou, Peoples R China
3.Univ Hong Kong, Dept Earth Sci, Hong Kong, Peoples R China
First Author AffilicationSchool of Environmental Science and Engineering
Corresponding Author AffilicationSchool of Environmental Science and Engineering
First Author's First AffilicationSchool of Environmental Science and Engineering
Recommended Citation
GB/T 7714
Shan, Jipeng,Yang, Zhenlei,Kuang, Xingxing,et al. Impact of high-permeability preferential flow zones on pumping-induced airflow in unconfined aquifer[J]. HYDROLOGICAL PROCESSES,2023,37(3).
APA
Shan, Jipeng,Yang, Zhenlei,Kuang, Xingxing,&Jiao, Jiu Jimmy.(2023).Impact of high-permeability preferential flow zones on pumping-induced airflow in unconfined aquifer.HYDROLOGICAL PROCESSES,37(3).
MLA
Shan, Jipeng,et al."Impact of high-permeability preferential flow zones on pumping-induced airflow in unconfined aquifer".HYDROLOGICAL PROCESSES 37.3(2023).
Files in This Item:
There are no files associated with this item.
Related Services
Fulltext link
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Export to Excel
Export to Csv
Altmetrics Score
Google Scholar
Similar articles in Google Scholar
[Shan, Jipeng]'s Articles
[Yang, Zhenlei]'s Articles
[Kuang, Xingxing]'s Articles
Baidu Scholar
Similar articles in Baidu Scholar
[Shan, Jipeng]'s Articles
[Yang, Zhenlei]'s Articles
[Kuang, Xingxing]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Shan, Jipeng]'s Articles
[Yang, Zhenlei]'s Articles
[Kuang, Xingxing]'s Articles
Terms of Use
No data!
Social Bookmark/Share
No comment.

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.