Radar interferometry for monitoring land subsidence and coastal change in the Nile Delta, Egypt

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dc.contributor.advisor Giardino , John Rick en_US
dc.contributor.committeeMember Mathewson , Christopher C en_US
dc.creator Aly , Mohamed Hassan en_US
dc.date.accessioned 2010 -01 -14T23 :57 :15Z
dc.date.accessioned 2014 -02 -19T19 :33 :57Z
dc.date.available 2010 -01 -14T23 :57 :15Z
dc.date.available 2014 -02 -19T19 :33 :57Z
dc.date.created 2006 -08 en_US
dc.date.issued 2009 -05 -15 en_US
dc.identifier.uri http : / /hdl .handle .net /1969 .1 /ETD -TAMU -1022
dc.description.abstract Land subsidence and coastal erosion are worldwide problems , particularly in densely populated deltas . The Nile Delta is no exception . Currently , it is undergoing land subsidence and is simultaneously experiencing retreat of its coastline . The impacts of these long -term interrelated geomorphic problems are heightened by the economic , social and historical importance of the delta to Egypt . Unfortunately , the current measures of the rates of subsidence and coastal erosion in the delta are rough estimates at best . Sustainable development of the delta requires accurate and detailed spatial and temporal measures of subsidence and coastal retreat rates . Radar interferometry is a unique remote sensing approach that can be used to map topography with 1 m vertical accuracy and measure surface deformation with 1 mm level accuracy . Radar interferometry has been employed in this dissertation to measure urban subsidence and coastal change in the Nile Delta . Synthetic Aperture Radar (SAR ) data of 5 .66 cm wavelength acquired by the European Radar Satellites (ERS -1 and ERS - 2 ) spanning eight years (1993 -2000 ) have been used in this investigation . The ERS data have been selected because the spatial and temporal coverage , as well as the short wavelength , are appropriate to measure the slow rate of subsidence in the delta . The ERS tandem coherence images are also appropriate for coastal change detection . The magnitude and pattern of subsidence are detected and measured using Permanent Scatterer interferometry . The measured rates of subsidence in greater Cairo , Mansura , and Mahala are 7 , 9 , and 5 mm yr -1 , respectively . Areas of erosion and accretion in the eastern side of the delta are detected using the ERS tandem coherence and the ERS amplitude images . The average measured rates of erosion and accretion are -9 .57 and +5 .44 m yr -1 , respectively . These measured rates pose an urgent need of regular monitoring of subsidence and coastline retreat in the delta . This study highlighted the feasibility of applying Permanent Scatterer interferometry in inappropriate environment for conventional SAR interferometry . The study addressed possibilities and limitations for successful use of SAR interferometry within the densely vegetated delta and introduced alternative strategies for further improvement of SAR interferometric measurements in the delta . en_US
dc.format.medium electronic en_US
dc.format.mimetype application /pdf en_US
dc.language.iso en _US en_US
dc.subject Radar Interferometry en_US
dc.title Radar interferometry for monitoring land subsidence and coastal change in the Nile Delta , Egypt en_US
dc.type Book en
dc.type.genre Electronic Dissertation en_US
dc.type.material text en_US
dc.format.digitalOrigin born digital en_US

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Radar interferometry for monitoring land subsidence and coastal change in the Nile Delta, Egypt. Available electronically from http : / /hdl .handle .net /1969 .1 /ETD -TAMU -1022 .

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