Improving spatiotemporal groundwater estimates after natural disasters using remotely sensed data: a case study of the Indian Ocean Tsunami

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cg.contributor.affiliationInternational Water Management Instituteen
cg.contributor.crpWater, Land and Ecosystems
cg.coverage.countryIndia
cg.coverage.iso3166-alpha2IN
cg.coverage.regionAsia
cg.coverage.regionSouthern Asia
cg.creator.identifierPennan Chinnasamy: 0000-0002-3184-2134
cg.identifier.doihttps://doi.org/10.1007/s12145-015-0238-yen
cg.issn1865-0473en
cg.issn1865-0481en
cg.issue1en
cg.journalEarth Science Informaticsen
cg.volume9en
dc.contributor.authorChinnasamy, Pennanen
dc.contributor.authorSunde, M.G.en
dc.date.accessioned2015-10-06T06:03:40Zen
dc.date.available2015-10-06T06:03:40Zen
dc.identifier.urihttps://hdl.handle.net/10568/68437
dc.titleImproving spatiotemporal groundwater estimates after natural disasters using remotely sensed data: a case study of the Indian Ocean Tsunamien
dcterms.abstractThe Indian Ocean Tsunami of December 26, 2004 devastated coastal ecosystems across South Asia. Along the coastal regions of South India, increased groundwater levels (GWL), largely caused by saltwater intrusion, infiltration from inundated land, and disturbance of freshwater lenses, were reported. Many agencies allocated funding for restoration and rehabilitation projects. However, to streamline funding allocation efforts, district-level groundwater inundation/recession data would have been a useful tool for planners. Thus, to ensure better preparedness for future disaster relief operations, it is crucial to quantify pre- and post-tsunami groundwater levels across coastal districts in India. Since regional scale GWL field observations are not often available, this study instead used space gravimetry data from NASA’s Gravity Recovery and Climate Experiment (GRACE), along with soil moisture data from the Global Land Data Assimilation Systems (GLDAS), to quantify GWL fluctuations caused by the tsunami. A time-series analysis of equivalent groundwater thickness was developed for February 2004–December 2005 and the results indicated a net increase of 274 % in GWLs along coastal regions in Tamil Nadu following the tsunami. The net recharge volume of groundwater due to the tsunami was 16.8 km3, just 15 % lower than the total annual groundwater recharge (19.8 km3) for the state of Tamil Nadu. Additionally, GWLs returned to average within 3 months following the tsunami. The analysis demonstrated the utility of remotely sensed data in predicting and assessing the impacts of natural disasters.en
dcterms.accessRightsLimited Access
dcterms.available2015-09-04
dcterms.bibliographicCitationChinnasamy, Pennan; Sunde, M. G. 2015. Improving spatiotemporal groundwater estimates after natural disasters using remotely sensed data: a case study of the Indian Ocean Tsunami. Earth Science Informatics, 14p. (Online first). doi: https://doi.org/10.1007/s12145-015-0238-yen
dcterms.extentpp. 101-111en
dcterms.issued2016-03
dcterms.languageen
dcterms.licenseCopyrighted; all rights reserved
dcterms.publisherSpringeren
dcterms.subjectgroundwateren
dcterms.subjectwater levelsen
dcterms.subjectwater storageen
dcterms.subjectnatural disastersen
dcterms.subjectdisaster risk managementen
dcterms.subjecttsunamisen
dcterms.subjectrainen
dcterms.subjectfloodingen
dcterms.subjectsalt water intrusionen
dcterms.subjectremote sensingen
dcterms.subjectcoastal areaen
dcterms.subjectsoil moistureen
dcterms.subjectecosystemsen
dcterms.typeJournal Article

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