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Longitudinal profiles in bedrock rivers. Tectonic controls and landscape evolution significance in the Lower Guadiana River

dc.contributor.authorGarzón Heydt, Guillermina
dc.contributor.authorOrtega, J.A.
dc.contributor.authorGarrote, J.
dc.date.accessioned2014-06-12T11:01:46Z
dc.date.available2014-06-12T11:01:46Z
dc.date.issued2008
dc.identifier.urihttp://hdl.handle.net/10272/8280
dc.description.abstractBedrock rivers are increasingly becoming of interest due to their significance in controlling upstream entrenchment by fixing the base level. Longitudinal profiles are dependant not only of discharge but also on incision capability due to bedload transport thresholds determined by gradient availability. The lower Guadiana River incises into the large Extremadura-Alentexo planation surface, developing large canyon carved on extended flat rocky benches with internal channels. Their development cannot be understood as that of simple hydrodynamic features produced and backwards erosion by lithologic control. In order to determine drainage network evolution in relation to regional surfaces and tectonics, longitudinal profiles river profiles from the Guadiana River and its tributaries have been reconstructed and their concavity index and mathematical fitting curves analysed. Different reaches might be interpreted on a morphostructural framework, with convex river profiles adjusting to active base level lowering as compared to the more stable and better evolved upstream rivers. To explain the convexity towards the south, one must consider the subsidence of the Guadalquivir flexure, which coincides roughly with the Guadiana mouthen_US
dc.language.isospaen_US
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subject.otherBedrock riversen_US
dc.subject.otherLongitudinal profilesen_US
dc.subject.otherConcavity indexen_US
dc.subject.otherTectonic morphologyen_US
dc.titleMorfología de perfiles de ríos en roca. Control tectónico y significado evolutivo en el Bajo Guadianaen_US
dc.titleLongitudinal profiles in bedrock rivers. Tectonic controls and landscape evolution significance in the Lower Guadiana Rivereng
dc.typeinfo:eu-repo/semantics/articleen_US
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess


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