Drivers of erosion and suspended sediment transport in three headwater catchments of the Mexican Central Highlands
Por:
Duvert C., Gratiot N., Evrard O., Navratil O., Némery J., Prat C., Esteves M.
Publicada:
15 nov 2010
Categoría:
Earth-Surface Processes
Resumen:
Quantifying suspended sediment exports from catchments and understanding suspended sediment dynamics within river networks is important, especially in areas draining erodible material that contributes to the siltation of downstream reservoirs and to the degradation of water quality. A one-year continuous monitoring study of water and sediment fluxes was conducted in three upland subcatchments (3.0, 9.3, and 12.0 km(2)) located within the Cointzio basin, in the central volcanic highlands of Mexico (Michoacan state). Two subcatchments generated high sediment exports (i.e., Huertitas, 900-1500 tkm(-2)y(-1) and Potrerillos, 600-800 tkm(-2)y(-1)), whereas the third subcatchment was characterized by a much lower sediment yield (i.e., La Cortina, 30 tkm(-2)y(-1)). Such disparities in subcatchment behaviours were associated with the presence of severely gullied areas in Huertitas and Potrerillos rather than with rainfall erosivity indices. An adapted classification of hysteretic patterns betwe
Filiaciones:
Univ Nacl Autonoma Mexico, Ctr Invest Geog Ambiental, Morelia, Michoacan, Mexico
Laboratoire d'étude des Transferts en Hydrologie et Environnement (LTHE), Université de Grenoble/IRD, Grenoble, France
Laboratoire des Sciences du Climat et de l'Environnement (LSCE/IPSL), Unité Mixte de Recherche 8212, CEA, CNRS, UVSQ, Gif-sur-Yvette, France
All Open Access; Green
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