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Article: Groundwater response to tidal fluctuation in a two-zone aquifer

TitleGroundwater response to tidal fluctuation in a two-zone aquifer
Authors
KeywordsCoastal aquifer
Groundwater head fluctuation
Tidal fluctuation
Two-zone aquifer
Zone-contrast parameter
Issue Date2010
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/jhydrol
Citation
Journal Of Hydrology, 2010, v. 381 n. 3-4, p. 364-371 How to Cite?
AbstractA coastal aquifer may consist of two zones of distinctly different hydraulic properties, with the coastal zone of limited width and the inland zone of infinite width. The analytical solutions for groundwater level response to tidal fluctuation in such a two-zone aquifer are derived and the underlying physical meanings are discussed. A dimensionless zone-contrast parameter r is introduced, which is controlled by ratio between the product of the transmissivity and storativity of the inland zone and that of the coastal zone. In the coastal zone, the amplitude of groundwater head fluctuation attenuates more quickly when r becomes greater. The amplitude declines exponentially with distance from the coastline, and the phase lag increases linearly only when r = 1. In the inland zone, however, the head fluctuation always exhibits an exponential attenuation of the amplitude and a linear increase of the phase lag for any value of r. Thus, the diffusivity of the inland zone can be readily assessed with measurements of fluctuation amplitudes or lags, as are frequently used when estimating aquifer parameters in homogeneous aquifers. Compared with Jacob (1950) solution for a semi-infinite homogeneous aquifer, the existence of the coastal zone reduces the amplitude in the inland zone by a spatially constant coefficient and increases the phase lag by a spatially constant shift. Inverse estimation of aquifer parameters are discussed based on the analytical solutions. The analytical solutions are used to estimate the aquifer parameters in a coastal two-zone aquifer located in the west part of Dongzhai Harbor, Hainan Province, China. © 2009 Elsevier B.V. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/129155
ISSN
2015 Impact Factor: 3.043
2015 SCImago Journal Rankings: 1.743
ISI Accession Number ID
Funding AgencyGrant Number
Hong Kong Special Administrative Region, China7028/05P
National Basic Research Program of China (973 Program)2010CB428806
National Natural Science Foundation of China40672167
Funding Information:

The study was partially supported by the Research Grants Council of the Hong Kong Special Administrative Region, China (HKU 7028/05P), the National Basic Research Program of China (973 Program) under the Grant No. 2010CB428806, and the National Natural Science Foundation of China (No. 40672167). We thank Mr. Simon Tsang from The University of Hong Kong, and Mr. Yuqiang Xia, Yuchen Zhang and other students from China University of Geosciences (Wuhan) for their help in collecting field data.

References

 

DC FieldValueLanguage
dc.contributor.authorGuo, Hen_HK
dc.contributor.authorJiao, JJen_HK
dc.contributor.authorLi, Hen_HK
dc.date.accessioned2010-12-23T08:33:10Z-
dc.date.available2010-12-23T08:33:10Z-
dc.date.issued2010en_HK
dc.identifier.citationJournal Of Hydrology, 2010, v. 381 n. 3-4, p. 364-371en_HK
dc.identifier.issn0022-1694en_HK
dc.identifier.urihttp://hdl.handle.net/10722/129155-
dc.description.abstractA coastal aquifer may consist of two zones of distinctly different hydraulic properties, with the coastal zone of limited width and the inland zone of infinite width. The analytical solutions for groundwater level response to tidal fluctuation in such a two-zone aquifer are derived and the underlying physical meanings are discussed. A dimensionless zone-contrast parameter r is introduced, which is controlled by ratio between the product of the transmissivity and storativity of the inland zone and that of the coastal zone. In the coastal zone, the amplitude of groundwater head fluctuation attenuates more quickly when r becomes greater. The amplitude declines exponentially with distance from the coastline, and the phase lag increases linearly only when r = 1. In the inland zone, however, the head fluctuation always exhibits an exponential attenuation of the amplitude and a linear increase of the phase lag for any value of r. Thus, the diffusivity of the inland zone can be readily assessed with measurements of fluctuation amplitudes or lags, as are frequently used when estimating aquifer parameters in homogeneous aquifers. Compared with Jacob (1950) solution for a semi-infinite homogeneous aquifer, the existence of the coastal zone reduces the amplitude in the inland zone by a spatially constant coefficient and increases the phase lag by a spatially constant shift. Inverse estimation of aquifer parameters are discussed based on the analytical solutions. The analytical solutions are used to estimate the aquifer parameters in a coastal two-zone aquifer located in the west part of Dongzhai Harbor, Hainan Province, China. © 2009 Elsevier B.V. All rights reserved.en_HK
dc.languageengen_US
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/jhydrolen_HK
dc.relation.ispartofJournal of Hydrologyen_HK
dc.subjectCoastal aquiferen_HK
dc.subjectGroundwater head fluctuationen_HK
dc.subjectTidal fluctuationen_HK
dc.subjectTwo-zone aquiferen_HK
dc.subjectZone-contrast parameteren_HK
dc.titleGroundwater response to tidal fluctuation in a two-zone aquiferen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0022-1694&volume=381&issue=3-4&spage=364&epage=371&date=2010&atitle=Groundwater+response+to+tidal+fluctuation+in+a+two-zone+aquifer-
dc.identifier.emailJiao, JJ:jjiao@hku.hken_HK
dc.identifier.authorityJiao, JJ=rp00712en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.jhydrol.2009.12.009en_HK
dc.identifier.scopuseid_2-s2.0-74549181089en_HK
dc.identifier.hkuros178626en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-74549181089&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume381en_HK
dc.identifier.issue3-4en_HK
dc.identifier.spage364en_HK
dc.identifier.epage371en_HK
dc.identifier.isiWOS:000274927700017-
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridGuo, H=25226459100en_HK
dc.identifier.scopusauthoridJiao, JJ=7102382963en_HK
dc.identifier.scopusauthoridLi, H=35769216800en_HK
dc.identifier.citeulike6476953-

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