Deformational behaviours of alluvial units detected by Advanced Radar Interferometry in the Vega Media of the Segura River, southeast Spain

Show simple item record Conesa García, Carmelo Tomás, Roberto Herrera García, Gerardo López Bermudez, Francisco Cano, Miguel Navarro Hervás, Francisca Pérez Cutillas, Pedro 2020-10-14T09:25:10Z 2020-10-14T09:25:10Z 2016-11-15
dc.identifier.citation Geografiska Annaler: Series A, Physical Geography 2016, v. 98, n.1, 43 p. es_ES
dc.identifier.issn 1468-0459
dc.description.abstract It is widely known that differential land subsidence in a valley significantly controls its fluvial dynamics. Nevertheless, major uncertainty exists about the way in which alluvial forms respond to this process. In this study, morphological and lithostratigraphic data have been combined with Advanced Differential Interferometry (A-DInSAR) to detect changes in alluvial landform elevations and to verify the existence of a differential subsidence pattern influenced by active sedimentary dynamics. For this purpose, the middle reach of the Segura River valley (Vega Media of the Segura River, VMSR), in south-east Spain, was chosen as the study area. The VMSR is an alluvial area affected by subsidence processes in close conjunction with depositional conditions, ground-water withdrawals and faults. A high scale mapping of the main younger sedimentary units was carried out by combining multi-temporal aerial photographs, high resolution DEMs derived from LIDAR data, GNSS data and field work. In addition, lithostratigraphic descriptions were obtained from geotechnical drilling and trenching. Finally, ground surface displacements, measured using A-DInSAR for the periods 1995-2005 and 2004-2008, allowed the determination of elevation rates and ground deformation associated with the different alluvial units. The results from this analysis revealed four typical deformational behaviours: a) Non-deformational units (cemented alluvial fans and upper fluvial terraces); b) Slightly deformable units (lower terraces and old abandoned meanders); c) Moderately deformable units (lateral accretion zones and abandoned meanders before channelisation in 1981); and d) highly deformable areas (recently active meanders associated with artificial cutoffs by channelisation, non-active floodplains and spilling zones). es_ES
dc.description.sponsorship Departamento de Geografía Física, Universidad de Murcia, España es_ES
dc.description.sponsorship Departamento de Ingeniería Civil, Universidad de Alicante, España es_ES
dc.description.sponsorship Unidad Asociada de investigación UA-IGME de movimientos del terreno mediante interferometría radar (UNIRAD) es_ES
dc.description.sponsorship Geohazards InSAR Laboratory and Modeling Group, Instituto Geológico y Minero de España, España es_ES
dc.description.sponsorship Centro de Edafología y Biología Aplicada del Segura, Consejo Superior de Investigaciones Científicas, España es_ES
dc.language.iso en es_ES
dc.publisher Wiley es_ES
dc.publisher Swedish Society for Anthropology and Geography es_ES
dc.publisher Taylor and Francis es_ES
dc.relation 15224/PI/10 es_ES
dc.relation TEC2011-28201-C02-02 es_ES
dc.relation TIN2014-55413-C2-2-P es_ES
dc.relation ESP2013-47780-C2-2-R es_ES
dc.relation PRX14/00100 es_ES
dc.rights Acceso abierto es_ES
dc.subject alluvial forms es_ES
dc.subject deformation rates es_ES
dc.subject A-DInSAR es_ES
dc.title Deformational behaviours of alluvial units detected by Advanced Radar Interferometry in the Vega Media of the Segura River, southeast Spain es_ES
dc.type Postprint es_ES
dc.relation.publisherversion es_ES
dc.description.funder Fundación SENECA es_ES
dc.description.funder Ministerio de Economía y Competitividad, España es_ES
dc.description.funder Fondos FEDER, Unión Europea es_ES
dc.description.funder Agencia Espacial Europea es_ES
dc.identifier.doi es_ES

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