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dc.contributor.author
Uhlemann, Sebastian
dc.contributor.author
Kuras, Oliver
dc.contributor.author
Richards, Laura A.
dc.contributor.author
Naden, Emma
dc.contributor.author
Polya, David A.
dc.date.accessioned
2017-10-20T15:29:46Z
dc.date.available
2017-10-06T05:22:39Z
dc.date.available
2017-10-20T15:29:46Z
dc.date.issued
2017-10-01
dc.identifier.other
10.1016/j.jseaes.2017.07.043
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/192636
dc.identifier.doi
10.3929/ethz-b-000192636
dc.description.abstract
Despite being rich in water resources, many areas of South East Asia face difficulties in securing clean water supply. This is particularly problematic in regions with a rapidly growing population. In this study, the spatial variability of the thickness of a clay layer, controlling surface – groundwater interactions that affect aquifer vulnerability, was investigated using electrical resistivity tomography (ERT). Data were acquired along two transects, showing significant differences in the imaged resistivities. Borehole samples were analyzed regarding particle density and composition, and linked to their resistivity. The obtained relationships were used to translate the field electrical resistivities into lithologies. Those revealed considerable variations in the thickness of the clay layer, ranging from 0 m up to 25 m. Geochemical data, highlighting zones of increased ingress of surface water into the groundwater, confirmed areas of discontinuities in the clay layer, which act as preferential flow paths. The results may guide urban planning of the Phnom Penh city expansion, in order to supply the growing population with safe water. The presented approach of using geophysics to estimate groundwater availability, accessibility, and vulnerability is not only applicable to Kandal Province, Cambodia, but also to many other areas of fast urbanization in South East Asia and beyond.
en_US
dc.language.iso
en
en_US
dc.publisher
Elsevier
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.subject
Electrical resistivity tomography
en_US
dc.subject
Surface water – groundwater interactions
en_US
dc.subject
Aquifer vulnerability
en_US
dc.title
Electrical resistivity tomography determines the spatial distribution of clay layer thickness and aquifer vulnerability, Kandal Province, Cambodia
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2017-07-21
ethz.journal.title
Journal of Asian Earth Sciences
ethz.journal.volume
147
en_US
ethz.pages.start
402
en_US
ethz.pages.end
414
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Kidlington
en_US
ethz.publication.status
published
en_US
ethz.date.deposited
2017-10-06T05:22:46Z
ethz.source
SCOPUS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-10-20T15:29:49Z
ethz.rosetta.lastUpdated
2017-12-22T02:18:53Z
ethz.rosetta.versionExported
true
ethz.COinS
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