Please use this identifier to cite or link to this item: http://repositorio.lnec.pt:8080/jspui/handle/123456789/1002114
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dc.contributor.authorHeleno, S.pt_BR
dc.contributor.authorOliveira, L. G. S.pt_BR
dc.contributor.authorHenriques, M. J.pt_BR
dc.contributor.authorFalcão, A. P.pt_BR
dc.contributor.authorLima, J. N.pt_BR
dc.contributor.authorCooksley, G.pt_BR
dc.contributor.authorFerretti, A.pt_BR
dc.contributor.authorFonseca, A. M.pt_BR
dc.contributor.authorLobo Ferreira, J. P. C.pt_BR
dc.contributor.authorFonseca, J.pt_BR
dc.date.accessioned2011-06-07T09:49:01Zpt_BR
dc.date.accessioned2014-10-09T13:51:39Zpt_BR
dc.date.accessioned2016-06-23T09:43:59Z-
dc.date.available2011-06-07T09:49:01Zpt_BR
dc.date.available2014-10-09T13:51:39Zpt_BR
dc.date.available2016-06-23T09:43:59Z-
dc.date.issued2011-05pt_BR
dc.identifier.urihttp://repositorio.lnec.pt:8080/jspui/handle/123456789/1002114-
dc.description.abstractResults from the application of Persistent Scatterers Interferometry in Lisbon Metropolitan Area revealed two previously unknown subsiding urban areas: one (Laranjeiras) is located in the center of Lisbon; another (Vialonga) is to be found toward the North, in an industrial region crossed by Lisbon's main highway and railway lines. The two subsiding sectors are bordered by sharp velocity gradients, and the subsidence pattern appears partially delimited by mapped geologic faults. Surface geology and urbanization alone are unable to explain the phenomena. In the Vialonga area, the historical record of water pore pressure shows a clear decline of the levels (up to 65 m in 27 years), providing evidence of over-exploitation of groundwater resources. Limited information from wells drilled inside and outside the subsidence area points to a spatial correlation between the subsidence and the water pressure levels, and suggests that faults could be acting as hydraulic barriers in the aquifer system. The surface subsidence detected is probably caused by compaction of a clay-rich Oligocene-aged aquitard, led by over-exploitation of adjacent aquifers. The same Oligocene aquitard layer is present in the Laranjeiras area, immediately bellow a multi-layered sand–clay–limestone Miocene aquifer, but further work is needed to diagnose the possibility of over-exploitation of groundwater here. In this work we were able to independently confirm the PSI results, by comparing autonomous PSI results processed for the same geographical areas, and by comparing PSI with leveling and continuous GPS derived subsidence velocities, whose close match provided further ground validation of the space-borne PSI technique.pt_BR
dc.description.sponsorshipFCTpt_BR
dc.language.isoengpt_BR
dc.rightsrestrictedAccesspt_BR
dc.subjectPsi interferometrypt_BR
dc.subjectMetropolitan lisbonpt_BR
dc.subjectSurface subsidencept_BR
dc.subjectGroundwaterpt_BR
dc.subjectLevelingpt_BR
dc.subjectGpspt_BR
dc.titlePersistent Scatterers Interferometry detects and measures ground subsidence in Lisbonpt_BR
dc.typeworkingPaperpt_BR
dc.description.volumedoi:10.1016/j.rse.2011.04.021pt_BR
dc.description.sectorDBB/NGApt_BR
dc.description.magazineRemote Sensing of Environmentpt_BR
Appears in Collections:DBB/NGA - Comunicações a congressos e artigos de revista

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