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Change in runoff (?RO, mm/yr) due to historical forest conversion to agriculture.

Map description and dataset provided by: Water Systems Analysis Group, Complex System Research Center, Institute for the Study of Earth, Oceans and Space, University of New Hampshire, USA

DescriptionChange In Runoff due to Deforestation

This map shows gridded fields of changes in runoff due to historical deforestation and conversion to agriculture from Douglas et al. (2005). This historical scenario compared distributed runoff (RO) generated from pre-industrial land cover with runoff derived from contemporary landcover.

Interpretation

Across the pan-tropical domain, approximately 9.5 million km2 of tropical forest area has been converted to agricultural land use. Thirty-two percent of forests have been converted to agriculture (as of the mid- 1990s) from pre-industrial conditions yielding an approximate 10% increase in annual basin water yield (a ratio of 1% water yield increase for every 3% forest area lost). The largest proportion of both forest conversion and increased yield has occurred in southeast Asia, where a 44% forest conversion has yielded a 23% increase in annual basin yield.

Source

The dataset for this map was provided by: Charles J. Vörösmarty, Water Systems Analysis Group, Complex System Research Center, Institute for the Study of Earth, Oceans and Space, University of New Hampshire, USA

Background

This dataset was developed for the World Water Development Report II, Indicators for the World Water Assessment Program (http://wwdrii.sr.unh.edu/index.html) and in support of analysis outlined in Douglas et al.; 2005.

Citation

Please cite this map as: "GWSP Digital Water Atlas (2008). Map 52: Change In Runoff due to Deforestation (V1.0). Available online at http://atlas.gwsp.org."

Contact Information

Charles J. Vörösmarty, Water Systems Analysis Group, Complex System Research Center, Institute for the Study of Earth, Oceans and Space, University of New Hampshire, Durham, NH USA 03824, This e-mail address is being protected from spam bots, you need JavaScript enabled to view it , Phone: +01.603.862.0850, Fax: +01.603.8

 
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