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Article: Modeling Fresh Water Lens Damage and Recovery on Atolls After Storm-Wave Washover

TitleModeling Fresh Water Lens Damage and Recovery on Atolls After Storm-Wave Washover
Authors
Issue Date2012
PublisherBlackwell Publishing, Inc. The Journal's web site is located at http://www.blackwellpublishing.com/journal.asp?ref=0017-467X&site=1
Citation
Ground Water, 2012, v. 50 n. 3, p. 412-420 How to Cite?
AbstractThe principal natural source of fresh water on scattered coral atolls throughout the tropical Pacific Ocean is thin unconfined groundwater lenses within islet substrates. Although there are many threats to the viability of atoll fresh water lenses, salinization caused by large storm waves washing over individual atoll islets is poorly understood. In this study, a mathematical modeling approach is used to examine the immediate responses, longer-term behavior, and subsequent (partial) recovery of a Pacific atoll fresh water lens after saline damage caused by cyclone-generated wave washover under different scenarios. Important findings include: (1) the saline plume formed by a washover event mostly migrates downward first through the top coral sand and gravel substrate, but then exits the aquifer to the ocean laterally through the more permeable basement limestone; (2) a lower water table position before the washover event, rather than a longer duration of storm washover, causes more severe damage to the fresh water lens; (3) relatively fresher water can possibly be found as a preserved horizon in the deeper part of an aquifer after disturbance, especially if the fresh water lens extends into the limestone under normal conditions; (4) post-cyclone accumulation of sea water in the central depression (swamp) of an atoll islet prolongs the later stage of fresh water lens recovery. © 2011, The Author(s). Ground Water © 2011, National Ground Water Association.
Persistent Identifierhttp://hdl.handle.net/10722/180443
ISSN
2015 Impact Factor: 1.947
2015 SCImago Journal Rankings: 1.111
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorChui, TFMen_US
dc.contributor.authorTerry, JPen_US
dc.date.accessioned2013-01-28T01:37:58Z-
dc.date.available2013-01-28T01:37:58Z-
dc.date.issued2012en_US
dc.identifier.citationGround Water, 2012, v. 50 n. 3, p. 412-420en_US
dc.identifier.issn0017-467Xen_US
dc.identifier.urihttp://hdl.handle.net/10722/180443-
dc.description.abstractThe principal natural source of fresh water on scattered coral atolls throughout the tropical Pacific Ocean is thin unconfined groundwater lenses within islet substrates. Although there are many threats to the viability of atoll fresh water lenses, salinization caused by large storm waves washing over individual atoll islets is poorly understood. In this study, a mathematical modeling approach is used to examine the immediate responses, longer-term behavior, and subsequent (partial) recovery of a Pacific atoll fresh water lens after saline damage caused by cyclone-generated wave washover under different scenarios. Important findings include: (1) the saline plume formed by a washover event mostly migrates downward first through the top coral sand and gravel substrate, but then exits the aquifer to the ocean laterally through the more permeable basement limestone; (2) a lower water table position before the washover event, rather than a longer duration of storm washover, causes more severe damage to the fresh water lens; (3) relatively fresher water can possibly be found as a preserved horizon in the deeper part of an aquifer after disturbance, especially if the fresh water lens extends into the limestone under normal conditions; (4) post-cyclone accumulation of sea water in the central depression (swamp) of an atoll islet prolongs the later stage of fresh water lens recovery. © 2011, The Author(s). Ground Water © 2011, National Ground Water Association.en_US
dc.languageengen_US
dc.publisherBlackwell Publishing, Inc. The Journal's web site is located at http://www.blackwellpublishing.com/journal.asp?ref=0017-467X&site=1en_US
dc.relation.ispartofGround Wateren_US
dc.subject.meshFresh Wateren_US
dc.subject.meshModels, Theoreticalen_US
dc.subject.meshSeawateren_US
dc.titleModeling Fresh Water Lens Damage and Recovery on Atolls After Storm-Wave Washoveren_US
dc.typeArticleen_US
dc.identifier.emailChui, TFM: maychui@hku.hken_US
dc.identifier.authorityChui, TFM=rp01696en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1111/j.1745-6584.2011.00860.xen_US
dc.identifier.pmid21883195-
dc.identifier.scopuseid_2-s2.0-84860365546en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-84860365546&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume50en_US
dc.identifier.issue3en_US
dc.identifier.spage412en_US
dc.identifier.epage420en_US
dc.identifier.isiWOS:000303320200013-
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridChui, TFM=24723787700en_US
dc.identifier.scopusauthoridTerry, JP=7103365580en_US

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