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Article: Analytical studies on transient groundwater flow induced by land reclamation

TitleAnalytical studies on transient groundwater flow induced by land reclamation
Authors
KeywordsLand reclamation
Analytical solution
Transient flow
Submarine groundwater discharge
Coastal aquifer
Issue Date2008
PublisherAmerican Geophysical Union.
Citation
Water Resources Research, 2008, v. 44 n. 11 How to Cite?
AbstractIn many coastal areas, land has been reclaimed by dumping fill materials into the sea. Land reclamation may have a significant effect on groundwater regimes, especially when the reclamation is at large scale. Analytical studies on the impact of land reclamation on steady-state ground water flow conditions were conducted previously, but transient analytical solutions are not yet available. Transient analytical solutions are derived to illustrate the temporal change of groundwater systems in response to land reclamation using two hypothetical models: a hillside aquifer and an oceanic elongated island. The analytical solutions show that when time is short, the water level in the reclaimed area increases significantly after reclamation while that in the original aquifer remains almost unchanged. When time is great, the change of water level in the reclaimed site becomes small but the increase of water level propagates into the original aquifer. For the specific parameters and aquifer geometry used in the examples, it takes at least over 100 years for the whole system to approach a new equilibrium. The island example demonstrates that land reclamation on one side of the island will eventually modify the groundwater regimes over the entire island, including the water level, water divide, and submarine groundwater discharge. The degree of the modification of the groundwater system and the time required for the system to approach a new equilibrium depend mainly on the hydraulic conductivity and storativity of the fill materials and the reclamation length. It is suggested that for a large reclamation project, the response of the groundwater regime to reclamation should be studied in detail to evaluate the long-term change of the flow system and the consequent environmental and engineering impacts. Copyright 2008 by the American Geophysical Union.
Persistent Identifierhttp://hdl.handle.net/10722/58676
ISSN
2015 Impact Factor: 3.792
2015 SCImago Journal Rankings: 2.661
ISI Accession Number ID
Funding AgencyGrant Number
Hong Kong Special Administrative RegionHKU 7028/06P
Land and Resources Department, Shenzhen Government, China
Funding Information:

The study was partially supported by the Research Grants Council project of the Hong Kong Special Administrative Region (HKU 7028/06P) and the project of "Studies on seawater intrusion and countermeasures in Shenzhen'' funded by the Land and Resources Department, Shenzhen Government, China. The constructive comments from Dr Andrew Guswa and other three anonymous reviewers have led to a significant improvement of the paper.

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DC FieldValueLanguage
dc.contributor.authorHu, Len_HK
dc.contributor.authorJiu, JJen_HK
dc.contributor.authorGuo, Hen_HK
dc.date.accessioned2010-05-31T03:34:51Z-
dc.date.available2010-05-31T03:34:51Z-
dc.date.issued2008en_HK
dc.identifier.citationWater Resources Research, 2008, v. 44 n. 11en_HK
dc.identifier.issn0043-1397en_HK
dc.identifier.urihttp://hdl.handle.net/10722/58676-
dc.description.abstractIn many coastal areas, land has been reclaimed by dumping fill materials into the sea. Land reclamation may have a significant effect on groundwater regimes, especially when the reclamation is at large scale. Analytical studies on the impact of land reclamation on steady-state ground water flow conditions were conducted previously, but transient analytical solutions are not yet available. Transient analytical solutions are derived to illustrate the temporal change of groundwater systems in response to land reclamation using two hypothetical models: a hillside aquifer and an oceanic elongated island. The analytical solutions show that when time is short, the water level in the reclaimed area increases significantly after reclamation while that in the original aquifer remains almost unchanged. When time is great, the change of water level in the reclaimed site becomes small but the increase of water level propagates into the original aquifer. For the specific parameters and aquifer geometry used in the examples, it takes at least over 100 years for the whole system to approach a new equilibrium. The island example demonstrates that land reclamation on one side of the island will eventually modify the groundwater regimes over the entire island, including the water level, water divide, and submarine groundwater discharge. The degree of the modification of the groundwater system and the time required for the system to approach a new equilibrium depend mainly on the hydraulic conductivity and storativity of the fill materials and the reclamation length. It is suggested that for a large reclamation project, the response of the groundwater regime to reclamation should be studied in detail to evaluate the long-term change of the flow system and the consequent environmental and engineering impacts. Copyright 2008 by the American Geophysical Union.en_HK
dc.languageengen_HK
dc.publisherAmerican Geophysical Union.en_HK
dc.relation.ispartofWater Resources Researchen_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.rightsWATER RESOURCES RESEARCH. Copyright © American Geophysical Union.en_HK
dc.subjectLand reclamation-
dc.subjectAnalytical solution-
dc.subjectTransient flow-
dc.subjectSubmarine groundwater discharge-
dc.subjectCoastal aquifer-
dc.titleAnalytical studies on transient groundwater flow induced by land reclamationen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0043-1397&volume=44&issue=11 article no. W11427&spage=&epage=&date=2008&atitle=Analytical+studies+on+transient+groundwater+flow+induced+by+land+reclamationen_HK
dc.identifier.emailJiu, JJ:jjiao@hku.hken_HK
dc.identifier.authorityJiu, JJ=rp00712en_HK
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1029/2008WR006926en_HK
dc.identifier.scopuseid_2-s2.0-58149092959en_HK
dc.identifier.hkuros161371en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-58149092959&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume44en_HK
dc.identifier.issue11en_HK
dc.identifier.isiWOS:000261250100001-
dc.publisher.placeUnited Statesen_HK
dc.relation.projectSubmarine groundwater discharge in Tolo Harbour and its possible ecological influence-
dc.identifier.scopusauthoridHu, L=14012430500en_HK
dc.identifier.scopusauthoridJiu, JJ=7102382963en_HK
dc.identifier.scopusauthoridGuo, H=25226459100en_HK
dc.identifier.citeulike8351917-

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