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Please use this identifier to cite or link to this item: http://dspace.utalca.cl/handle/1950/9137

Title: Temporal variations of rainfall and flows in the Maipo River Basin, central Chile, and the influence of glacier melting on water yield (1963-2006)
Authors: Pizarro-Tapia, R.
Cabrera-Jofre, C.
Morales-Calderon, C.
Flores-Villanelo, J.P.
Keywords: glaciers
climate change
Issue Date: 2011
Citation: TECNOLOGIA Y CIENCIAS DEL AGUA Volume: 2 Issue: 3 Pages: 5-19 Published: JUL-SEP 2011
Abstract: In this paper, precipitation and runoff trends over the past 40 years are inferred for two sub-basins of the Maipti River: El Colorado (1 710 km(2)) and the Alto del Maipo (3521.52 km(2)). The two sub-basins are located in the metropolitan region of Chile and have markedly snowy regimes. Five rain gauge stations with monthly and annual records (mm) were analyzed for the period 1963-2006. After completing the missing information for each station, mean areal precipitation was calculated using the Thiessen Polygons Method. Monthly and annual mean flow data were extracted from two flow gauging stations. The analysis of temporal behavior for rainfall and runoff variables was performed by adjusting the Type-1 Gumbel distribution function and calculating moving averages and the rainfall/runoff coefficient (existing ratio of rainfall to surface runoff; PP/E, abbreviation in Spanish). Thus, it was possible to determine that, over the last 40 years, the Maipo River basin showed increased winter rainfall, decreased summer and autumn rainfall and increased runoff during summer periods. Therefore, it can be inferred that the increase in this runoff is influenced by glacier melting.
Description: Pizarro-Tapia, R (reprint author), Univ Talca, Fac Ciencias Forestales, Dept Gest Forestal & Ambiental, Ave Licray sin Numero,Casilla 721, Talca, Chile.
URI: http://dspace.utalca.cl/handle/1950/9137
Appears in Collections:Artículos en publicaciones ISI - Universidad de Talca

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