Sediment budget in the Ucayali river basin, an Andean tributary of the Amazon river

• Autores: Santini, William, Martínez, Jean-Michel, Espinoza Villar, Raúl Arnaldo, Cochonneau, Gerard, Vauchel, Philippe, Moquet, Jean Sébastien, Baby, Patrice, Espinoza, Jhan Carlo, Lavado, Waldo, Carranza, Jorge, Guyot, Jean-Loup
• Formato: artículo
• Fecha de Publicación: 2015
• Institución: Instituto Geofísico del Perú
• Repositorio: IGP-Institucional
• Lenguaje: inglés
• OAI Identifier: oai:repositorio.igp.gob.pe:20.500.12816/2119
• Enlace del recurso: http://hdl.handle.net/20.500.12816/2119; https://doi.org/10.5194/piahs-367-320-2015
• Nivel de acceso: acceso abierto
• Materia: Ucayali; Pachitea; Andes; Amazon; Erosion; Sedimentation; MODIS; Peru; Hydrology; http://purl.org/pe-repo/ocde/ford#1.05.00; http://purl.org/pe-repo/ocde/ford#1.05.09; http://purl.org/pe-repo/ocde/ford#1.05.11

Formation of mountain ranges results from complex coupling between lithospheric deformation, mechanisms linked to subduction and surface processes: weathering, erosion, and climate. Today, erosion of the eastern Andean cordillera and sub-Andean foothills supplies over 99% of the sediment load passing through the Amazon Basin. Denudation rates in the upper Ucayali basin are rapid, favoured by a marked seasonality in this region and extreme precipitation cells above sedimentary strata, uplifted during Neogene times by a still active sub-Andean tectonic thrust. Around 40% of those sediments are trapped in the Ucayali retro-foreland basin system. Recent advances in remote sensing for Amazonian large rivers now allow us to complete the ground hydrological data. In this work, we propose a first estimation of the erosion and sedimentation budget of the Ucayali River catchment, based on spatial and conventional HYBAM Observatory network.