Climatic Forcing on Channel Profiles in the Eastern Cordillera of the Coroico Region, Bolivia
2010; University of Chicago Press; Volume: 119; Issue: 1 Linguagem: Inglês
10.1086/657407
ISSN1537-5269
Autores Tópico(s)Geological and Tectonic Studies in Latin America
ResumoOrographic precipitation has a large impact on channel morphology and rock uplift via a positive feedback to erosion. We show that in the Eastern Cordillera of Bolivia, channel concavities reach their highest values where annual precipitation increases in the downstream direction, exceeding 3000 mm. The steepest channels are upstream of this zone of high concavity, where precipitation rates are <1000 mm yr−1. Channels exhibit graded forms both upstream and downstream of this transient reach. We conclude that the prolonged effect of orographic erosion and related tectonic uplift is the preservation of channels with extreme concavities in the Eastern Cordillera.
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