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    Conversion to soy on the Amazonian agricultural frontier increases streamflow without affecting stormflow dynamics

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    hayhoe_2011.pdf (986.6Kb)
    Date
    2011-01
    Author
    Hayhoe, Shelby J.  Concept link
    Neill, Christopher  Concept link
    Porder, Stephen  Concept link
    McHorney, Richard  Concept link
    LeFebvre, Paul  Concept link
    Coe, Michael T.  Concept link
    Elsenbeer, Helmut  Concept link
    Krusche, Alex V.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/4551
    As published
    https://doi.org/10.1111/j.1365-2486.2011.02392.x
    Keyword
     Hydrology; Water yield; Baseflow; Land use change; Amazon; Soybean cultivation 
    Abstract
    Large-scale soy agriculture in the southern Brazilian Amazon now rivals deforestation for pasture as the region’s predominant form of land use change. Such landscape level change can have substantial consequences for local and regional hydrology, which remain relatively unstudied. We examined how the conversion to soy agriculture influences water balances and stormflows using stream discharge (water yields) and the timing of discharge (stream hydrographs) in small (2.5 to 13.5 km2) forested and soy headwater watersheds in the Upper Xingu Watershed in the state of Mato Grosso, Brazil. We monitored water yield for one year in three forested and four soy watersheds. Mean daily water yields were approximately four times higher in soy than forested watersheds, and soy watersheds showed greater seasonal variability in discharge. The contribution of stormflows to annual streamflow in all streams was low (< 13% of annual streamflow), and the contribution of stormflow to streamflow did not differ between land uses. If the increases in water yield observed in this study are typical, landscape-scale conversion to soy substantially alters water-balance, potentially altering the regional hydrology over large areas of the southern Amazon.
    Description
    Author Posting. © The Author(s), 2011. This is the author's version of the work. It is posted here by permission of John Wiley & Sons for personal use, not for redistribution. The definitive version was published in Global Change Biology 17 (2011): 1821–1833, doi:10.1111/j.1365-2486.2011.02392.x.
    Collections
    • Ecosystems Center
    Suggested Citation
    Preprint: Hayhoe, Shelby J., Neill, Christopher, Porder, Stephen, McHorney, Richard, LeFebvre, Paul, Coe, Michael T., Elsenbeer, Helmut, Krusche, Alex V., "Conversion to soy on the Amazonian agricultural frontier increases streamflow without affecting stormflow dynamics", 2011-01, https://doi.org/10.1111/j.1365-2486.2011.02392.x, https://hdl.handle.net/1912/4551
     
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