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dc.contributor.authorGaber, Ahmeden_US
dc.contributor.authorAbdelkareem, Mohameden_US
dc.contributor.authorAbdelsadek, Ismailen_US
dc.contributor.authorEl-Baz, Farouken_US
dc.contributor.authorKoch, M.en_US
dc.date2018-05-23
dc.date.accessioned2018-10-24T17:34:17Z
dc.date.available2018-10-24T17:34:17Z
dc.date.issued2018-05-25
dc.identifier.citationAhmed Gaber, Mohamed Abdelkareem, Ismail Abdelsadek, M Koch, Farouk El-Baz. 2018. "Using InSAR Coherence for Investigating the Interplay of Fluvial and Aeolian Features in Arid Lands: Implications for Groundwater Potential in Egypt." Remote Sensing, v. 10, Issue 6, pp. 832 - 849. https://doi.org/10.3390/rs10060832
dc.identifier.issn2072-4292
dc.identifier.urihttps://hdl.handle.net/2144/31494
dc.description.abstractDespite the fact that the Sahara is considered the most arid region on Earth, it has witnessed prolonged fluvial and aeolian depositional history, and might harbor substantial fresh groundwater resources. Its ancient fluvial surfaces are, however, often concealed by aeolian deposits, inhibiting the discovery and mapping of potential groundwater recharge areas. However, recent advances in synthetic aperture radar (SAR) imaging offer a novel approach for detecting partially hidden and dynamic landscape features. Interferometry SAR coherence change detection (CCD) is a fairly recent technique that allows the mapping of very slight surface changes between multidate SAR images. Thus, this work explores the use of the CCD method to investigate the fluvial and aeolian morphodynamics along two paleochannels in Egypt. The results show that during wetter climates, runoff caused the erosion of solid rocks and the rounding of sand-sized grains, which were subsequently deposited in depressions further downstream. As an alternating dry climate prevailed, the sand deposits were reshaped into migrating linear dunes. These highly dynamic features are depicted on the CCD image with very low coherence values close to 0 (high change), while the deposits within the associated ephemeral wadis show low to moderate coherence values ranging from 0.2 to 0.4 (high to moderate change), and the country rocks show a relative absence of change with high coherence values close to 1. These linear dunes crossed their parent’s stream courses and dammed the runoff to form lakes during rainy seasons. Part of the dammed surface water would have infiltrated the ground to recharge the permeable wadi deposits. The alternation of fluvial and aeolian depositional environments produced unique hydromorphometrically trapped lakes that are very rare in arid regions, but of great interest because of their significance to groundwater recharge.en_US
dc.format.extentp. 832-849en_US
dc.publisherMDPI AGen_US
dc.relation.ispartofRemote Sensing
dc.relation.isversionof10.3390/rs10060832
dc.rights© 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).en_US
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectInSAR coherenceen_US
dc.subjectEgypten_US
dc.subjectScience & technologyen_US
dc.subjectRemote sensingen_US
dc.subjectFluvial and aeolian dynamicsen_US
dc.subjectGroundwater resourcesen_US
dc.subjectShuttle imaging radaren_US
dc.subjectDigital elevation dataen_US
dc.subjectSelima sand sheeten_US
dc.subjectEastern Saharaen_US
dc.subjectSAR interferometryen_US
dc.subjectEarths surfaceen_US
dc.subjectWestern deserten_US
dc.subjectTopographyen_US
dc.subjectDeformationen_US
dc.subjectPenetrationen_US
dc.titleUsing InSAR coherence for investigating the interplay of fluvial and aeolian features in arid lands: implications for groundwater potential in Egypten_US
dc.typeArticleen_US
dc.identifier.doi10.3390/rs10060832
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-statusPublisheden_US
dc.date.online2018-05-25
dc.identifier.orcid0000-0002-6186-1619 (Koch, M)


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© 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access
article distributed under the terms and conditions of the Creative Commons Attribution
(CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Except where otherwise noted, this item's license is described as © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).