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Biogeochemistry

, Volume 105, Issue 1–3, pp 119–131 | Cite as

The effects of deforestation and climate variability on the streamflow of the Araguaia River, Brazil

  • M. T. Coe
  • E. M. Latrubesse
  • M. E. Ferreira
  • M. L. Amsler
Article

Abstract

Deforestation changes the hydrological, geomorphological, and biochemical states of streams by decreasing evapotranspiration on the land surface and increasing runoff, river discharge, erosion and sediment fluxes from the land surface. Deforestation has removed about 55% of the native vegetation and significantly altered the hydrological and morphological characteristics of an 82,632 km2 watershed of the Araguaia River in east-central Brazil. Observed discharge increased by 25% from the 1970s to the 1990s and computer simulations suggest that about 2/3 of the increase is from deforestation, the remaining 1/3 from climate variability. Changes of this scale are likely occurring throughout the 2,000,000 km2 savannah region of central Brazil.

Keywords

Cerrado Discharge Deforestation Land cover change Araguaia River Geomorphology 

Notes

Acknowledgments

We gratefully acknowledge the contributions of Paul Lefebvre in developing figures, Dr. Eric A. Davidson and Wendy Kingerlee’s helpful comments, and Dr. Hewlley Acioli’s help with precipitation data. We also thank two anonymous reviewers for comments that greatly improved the manuscript. Funding was provided by the United States National Aeronautics and Space Administration, Land Cover and Land Use Change and LBA-ECO programs, CNPq-Brazil, CYTED, and VITAE Foundation.

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Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  • M. T. Coe
    • 1
  • E. M. Latrubesse
    • 2
  • M. E. Ferreira
    • 3
  • M. L. Amsler
    • 4
  1. 1.The Woods Hole Research CenterFalmouthUSA
  2. 2.Department of Geography and the EnvironmentUniversity of Texas at AustinAustinUSA
  3. 3.Instituto de Estudos Sócio-Ambientais (IESA)Universidade Federal de GoiásGoiâniaBrazil
  4. 4.Instituto Nacional de Limnología (INALI)Universidad Nacional del Litoral-CONICET-CC217Santa FeArgentina

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