Climatic Change

, Volume 105, Issue 3–4, pp 469–488 | Cite as

Climate change impacts on the hydrology of a snowmelt driven basin in semiarid Chile

  • Sebastian Vicuña
  • René D. Garreaud
  • James McPhee
Article

Abstract

In this paper we present an analysis of the direct impacts of climate change on the hydrology of the upper watersheds (range in elevation from 1,000 to 5,500 m above sea level) of the snowmelt-driven Limarí river basin, located in north-central Chile (30° S, 70° W). A climate-driven hydrology and water resources model was calibrated using meteorological and streamflow observations and later forced by a baseline and two climate change projections (A2, B2) that show an increase in temperature of about 3–4°C and a reduction in precipitation of 10–30% with respect to baseline. The results show that annual mean streamflow decreases more than the projected rainfall decrease because a warmer climate also enhances water losses to evapotranspiration. Also in future climate, the seasonal maximum streamflow tends to occur earlier than in current conditions, because of the increase in temperature during spring/summer and the lower snow accumulation in winter.

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Copyright information

© Springer Science+Business Media B.V. 2010

Authors and Affiliations

  • Sebastian Vicuña
    • 1
  • René D. Garreaud
    • 2
  • James McPhee
    • 3
  1. 1.Centro Interdisciplinario de Cambio GlobalPontificia Universidad Catolica de ChileSantiagoChile
  2. 2.Department of Geophysics and Advanced Mining Technology Center, Facultad de Ciencias Físicas y MatemáticasUniversidad de ChileSantiagoChile
  3. 3.Department of Civil Engineering and Advanced Mining Technology Center, Facultad de Ciencias Físicas y MatemáticasUniversidad de ChileSantiagoChile

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