Planform dynamics of the Iquitos anabranching structure in the Peruvian Upper Amazon River

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dc.audience researchers es_MX
dc.contributor.author Alejandro Mendoza, 0000-0002-2479-9799
dc.contributor.author GABRIEL SOTO-CORTES, 0000-0003-1603-0354
dc.contributor.other Abad, Jorge D.
dc.contributor.other Frias, Christian E.
dc.contributor.other Ortals, Collin
dc.contributor.other Paredes, Jorge
dc.contributor.other Montoro, Hugo
dc.contributor.other Vizcarra, Jorge
dc.contributor.other Simon, Cesar
dc.coverage SZ es_MX
dc.date.accessioned 2018-06-27T01:26:19Z
dc.date.available 2018-06-27T01:26:19Z
dc.date.issued 2016
dc.description The upper reach of the Amazon River has a very dynamic morphology, with the highest rates of migration observed in the entire Amazon River. It has an anabranching channel pattern which alternates between a condition of single channel and anabranching structures; in particular, the anabranching structure near Iquitos City shows an interesting channel behavior. Its channels migrate at different rates, where there are processes of narrowing and widening, and also collision and development of new channels. The temporal evolution of the Iquitos anabranching structure is described during the period from 1985 to 2014. The study is carried out by using satellite images to track the migration patterns, which are contrasted to the underlying geological units in the valley. Bathymetry of the structure and several velocity transects were obtained during a field campaign prior to the 2012 historic flood event. This information allowed for numerical modeling in order to compute the hydrodynamic flow field that complements the temporal analysis, aiming to understand the planform migration patterns after the 2012 flood event. It is observed that the geological units play an important role in modulating the migration rates and planform development of the channels. The channels in the structure are in contention to be the main channel, which become the secondary channel after migration. This causes the channels to experience a rise in bed elevation and narrowing of the channel itself; if this trend continues for several more years, these channels will detach from the Iquitos anabranching structure, thus forming paleo‐channels. This geomorphic process is important for horizontal and vertical soil heterogeneity along the floodplain. In general, the analysis shows a complex interaction between the underlying geological units, flow structure, morphology of the bed and planform migration. es_MX
dc.format application/pdf es_MX
dc.identificador.materia 1 es_MX
dc.identifier.other http://dx.doi.org/10.1002/esp.3911
dc.identifier.uri http://hdl.handle.net/20.500.12222/166
dc.language eng es_MX
dc.publisher Wiley es_MX
dc.publisher John Wiley and Sons es_MX
dc.rights Attribution-NonCommercial-NoDerivatives 4.0 Internacional *
dc.rights.license info:eu-repo/semantics/restrictedAccess *
dc.rights.uri http://creativecommons.org/licenses/by-nc-sa/4.0/ es_MX
dc.source.other Earth Surface Processes and Landforms (7) vol.41 (2016) es_MX
dc.source.other ISSN: 0197-9337 es_MX
dc.subject CIENCIAS FÍSICO MATEMÁTICAS Y CIENCIAS DE LA TIERRA es_MX
dc.subject.keywords Anabranching Rivers es_MX
dc.subject.keywords River Migration es_MX
dc.subject.keywords Geological Modulation es_MX
dc.subject.keywords Amazon River es_MX
dc.title Planform dynamics of the Iquitos anabranching structure in the Peruvian Upper Amazon River es_MX
dc.type article es_MX
dc.type.version info:eu-repo/semantics/publishedVersion es_MX
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