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dc.contributor.authorGaber, Ahmeden_US
dc.contributor.authorDarwish, Nouraen_US
dc.contributor.authorKoch, Magalyen_US
dc.date2017-07-18
dc.date.accessioned2017-07-31T19:30:41Z
dc.date.available2017-07-31T19:30:41Z
dc.date.issued2017-07-21
dc.identifier.citationA Gaber, N Darwish, M Koch. 2017. "Minimizing the Residual Topography Effect on Interferograms to Improve DInSAR Results: Estimating Land Subsidence in Port-Said City, Egypt." Remote Sensing, Volume 9, Issue 7, pp. 752 - 752.
dc.identifier.issn2072-4292
dc.identifier.urihttps://hdl.handle.net/2144/23184
dc.description.abstractThe accurate detection of land subsidence rates in urban areas is important to identify damage-prone areas and provide decision-makers with useful information. Meanwhile, no precise measurements of land subsidence have been undertaken within the coastal Port-Said City in Egypt to evaluate its hazard in relationship to sea-level rise. In order to address this shortcoming, this work introduces and evaluates a methodology that substantially improves small subsidence rate estimations in an urban setting. Eight ALOS/PALSAR-1 scenes were used to estimate the land subsidence rates in Port-Said City, using the Small BAse line Subset (SBAS) DInSAR technique. A stereo pair of ALOS/PRISM was used to generate an accurate DEM to minimize the residual topography effect on the generated interferograms. A total of 347 well distributed ground control points (GCP) were collected in Port-Said City using the leveling instrument to calibrate the generated DEM. Moreover, the eight PALSAR scenes were co-registered using 50 well-distributed GCPs and used to generate 22 interferogram pairs. These PALSAR interferograms were subsequently filtered and used together with the coherence data to calculate the phase unwrapping. The phase-unwrapped interferogram-pairs were then evaluated to discard four interferograms that were affected by phase jumps and phase ramps. Results confirmed that using an accurate DEM (ALOS/PRISM) was essential for accurately detecting small deformations. The vertical displacement rate during the investigated period (2007–2010) was estimated to be −28 mm. The results further indicate that the northern area of Port-Said City has been subjected to higher land subsidence rates compared to the southern area. Such land subsidence rates might induce significant environmental changes with respect to sea-level rise.en_US
dc.format.extent752 - 752en_US
dc.publisherMDPI AGen_US
dc.relation.ispartofRemote Sensing
dc.rightsAttribution 4.0 Internationalen_US
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectPort-Said Cityen_US
dc.subjectEgypten_US
dc.subjectField calibrated DEMen_US
dc.subjectSBAS DInSARen_US
dc.subjectLand-subsidenceen_US
dc.titleMinimizing the residual topography effect on interferograms to improve DInSAR results: estimating land subsidence in Port-Said City, Egypten_US
dc.typeArticleen_US
dc.identifier.doi10.3390/rs9070752
pubs.elements-sourcemanual-entryen_US
pubs.notesEmbargo: Not knownen_US
pubs.organisational-groupBoston Universityen_US
pubs.organisational-groupBoston University, College of Arts & Sciencesen_US
pubs.publication-statusPublished onlineen_US
dc.date.online2017-07-21
dc.identifier.orcid0000-0002-6186-1619 (Koch, M)


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Attribution 4.0 International
Except where otherwise noted, this item's license is described as Attribution 4.0 International