pertinent spatio-temporal scale of observation to understand suspended sediment yield control factors in the andean region: the case of the santa river (peru)
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2013
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Abstract
Hydro-sedimentology development is a great challenge in Peru due to limited
data as well as sparse and confidential information. This study aimed to
quantify and to understand the suspended sediment yield from the west-central
Andes Mountains and to identify the main erosion-control factors and their
relevance. The Tablachaca River (3132 km2) and the Santa River
(6815 km2), located in two adjacent Andes catchments, showed similar
statistical daily rainfall and discharge variability but large differences in
specific suspended-sediment yield (SSY). In order to investigate the main
erosion factors, daily water discharge and suspended sediment concentration
(SSC) datasets of the Santa and Tablachaca rivers were analysed.
Mining activity in specific lithologies was identified as the major factor that controls the high SSY of the Tablachaca (2204 t km2 yr−1), which is four times greater than the Santa's SSY. These results show that the analysis of control factors of regional SSY at the Andes scale should be done carefully. Indeed, spatial data at kilometric scale and also daily water discharge and SSC time series are needed to define the main erosion factors along the entire Andean range.
Mining activity in specific lithologies was identified as the major factor that controls the high SSY of the Tablachaca (2204 t km2 yr−1), which is four times greater than the Santa's SSY. These results show that the analysis of control factors of regional SSY at the Andes scale should be done carefully. Indeed, spatial data at kilometric scale and also daily water discharge and SSC time series are needed to define the main erosion factors along the entire Andean range.
| Reference Key |
morera2013hydrologypertinent
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|---|---|
| Authors | ;S. B. Morera;T. Condom;P. Vauchel;J.-L. Guyot;C. Galvez;A. Crave |
| Journal | materials research bulletin |
| Year | 2013 |
| DOI |
10.5194/hess-17-4641-2013
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| URL | |
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