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Pan-tropical Runoff for the World Water Development Report II Entry ID: UNH_WWRDII_PANTROPIC |
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Summary
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Abstract:
Gridded fields of changes in runoff and river flow (discharge) due to historical and hypothetical deforestation from Douglas et al. (2005). Scenario 1 (Sc1, historical) compared distributed runoff (RO) and river flow (discharge, Q) generated from pre-industrial land cover (based on WWF Terrestrial Ecoregions of the World (Olson et al., 2001) with runoff and river flow derived from contemporary landcover. Scenario 2 (Sc2, hypothetical future) compared distributed runoff and river flow (discharge, Q) generated from the contemporary landcover with runoff and river flow generated from a hypothetical future forest conversion scenario. The contemporary landcover was developed by combining the Global Land Cover Characteristics Database (GLCCD 2000; Loveland et al. 2000) interpreted using the International Geosphere-Biosphere Programme (IGBP) land cover classification scheme (IGBP 1998) with cropland and cropland mosaic classes from the IFPRI Agricultural Extent database, which is a reinterpretation of the GLCCD v2.0 dataset. This exercise identified areas, at a 1km resolution, that contain 30 percent or more agricultural activity. For details on the creation of the IFPRI Agricultural Extent, see Wood et al. (2000) and IFPRI (2002). The Center for Sustainability and the Global Environment at the University of Wisconsin has developed a global pasture surface based also on a reinterpretation of the GLCCD v2.0 data. The pasture surface represents non-forest areas that are used for grazing (Ramankutty 2003). The agricultural extent and pasture surfaces were superimposed on the IGBP classified GLCCD to create the contemporary land cover surface. The objective Scenario 2 (hypothetical future forest conversion), was to design a hypothetical, "worst case" land cover change experiment that explored deforestation in the most vulnerable tracts of remaining forest, and to measure what effect this conversion could potentially have on biodiversity, hydrological function and ultimately, on downstream human populations. The baseline for this scenario was the contemporary land cover surface because the contemporary land cover surface was our best available representation of existing land cover. In Scenario 2, only existing forest area (circa 1992/3) within the tropical forest biomes was targeted for conversion; land cover in all remaining portions of the domain was held constant. The global conservation status from the WWF terrestrial ecoregions database (Olson et al., 2001) was used to identify the areas most vulnerable to change within the tropical forest biomes; forest conversion was limited to areas. The conservation status is an indicator of the degree and threat of change for each individual ecosystem. The key factors defining the conservation status are the degree of habitat loss, the level of fragmentation, remaining block size and level of conversion. The areas classified as critical or endangered were designated as those most threatened in terms of potential deforestation. Areas currently under protection, as identified by The World Conservation Monitoring Centre's (UNEP-WCMC, 2003) protected areas database, were therefore not subject to conversion. The sceanrios are defined as: Scenario 1: Change in runoff (del RO, in mm/yr) due to historical forest conversion to agriculture: Douglas et al. (2005) Scenario 1: Change in discharge (del Q, in km3/yr) due to historical forest conversion to agriculture: Douglas et al. (2005) Scenario 1: Relative change in discharge (ratio of del Q to Q) due to historical forest conversion to agriculture: Douglas et al. (2005) Scenario 2: Change in runoff (del RO, in mm/yr) due to hypothetical future forest conversion to agriculture: Douglas et al. (2005) Scenario 2: Change in discharge (del Q, in km3/yr) due to hypothetical future forest conversion to agriculture: Douglas et al. (2005) Scenario 2: Relative change in discharge (ratio of del Q to Q) due to hypothetical future forest conversion to agriculture: Douglas et al. (2005) |
Related URL
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Link:
GET DATA
Description: Access to water pollution indicators data Link: VIEW RELATED INFORMATION Description: Access to documentation |
Geographic Coverage
| N: 20.0 | S: -30.0 | E: 180.0 | W: -180.0 |
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Data Set Citation
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Dataset Originator/Creator:
Water Systems Analysis Group
Dataset Title: Water Pan-tropical Runoff and Human Vulnerability Dataset Series Name: World Water Development Report II Dataset Release Place: Durham, NH Dataset Publisher: University of New Hampshire Online Resource: http://wwdrii.sr.unh.edu/download.html |
Location Keywords
Science Keywords
| BIOSPHERE >TERRESTRIAL ECOSYSTEMS >AGRICULTURAL LANDS [Definition] |
| HUMAN DIMENSIONS >HABITAT CONVERSION/FRAGMENTATION >RECLAMATION/REVEGETATION/RESTORATION [Definition] |
| HUMAN DIMENSIONS >ENVIRONMENTAL GOVERNANCE/MANAGEMENT >WATER MANAGEMENT [Definition] |
| HUMAN DIMENSIONS >ENVIRONMENTAL GOVERNANCE/MANAGEMENT >LAND MANAGEMENT [Definition] |
| TERRESTRIAL HYDROSPHERE >SURFACE WATER >RUNOFF [Definition] |
| LAND SURFACE >LAND USE/LAND COVER >LAND COVER [Definition] |
| HUMAN DIMENSIONS >SOCIAL BEHAVIOR >VULNERABILITY LEVELS/INDEX [Definition] |
ISO Topic Category
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FARMING
IMAGERY/BASE MAPS/EARTH COVER |
Project
| WWAP >World Water Assessment Programme [Information] |
Keywords
| forest conversion to agriculture |
| change in runoff |
| World Water Asessment Programme |
| World Water Development Report II |
Data Set Progress
| COMPLETE |
Originating Center
| UNH |
Data Center
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Water Systems Analysis Group, Complex Systems Research Center, Institute for the Study of Earth, Oceans, and Space, University of New Hampshire
[Information]
Data Center URL: http://www.wsag.unh.edu/
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Distribution
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Distribution_Media:
online
Distribution_Format: JPEG, ascii, ARC Fees: none |
Personnel
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CHARLES
J.
VOROSMARTY Role: INVESTIGATOR Phone: (603) 862-1792 Fax: (603) 862-0188 Email: charles.vorosmarty at unh.edu Contact Address: Water Systems Analysis Group Complex Systems Research Center Institute for the Study of Earth, Oceans, and Space University of New Hampshire Morse Hall, 39 College Road City: DURHAM Province or State: NH Postal Code: 03824 Country: USA |
Publications/References
Douglas, E. M., K. Sebastian, C. J. Vorosmarty and S. Wood, 2005. The
role of tropical forests in supporting biodiversity and hydrologic
integrity, Ecological Applications, in review.
Global Land Cover Characteristics Database (GLCCD). Version
2.0. 2001. Available online at:
http://edcdaac.usgs.gov/glcc/glcc.html.
International Food Policy Research Institute (IFPRI). 2002. Global
Agricultural Extent v2.0. Available online at:
http://www.asb.cgiar.org/
International Geosphere Biosphere Programme (IGBP). 1998. Data and
Information Systems, IGBP-DIS Global Land Cover Set DISCover.
Olson, D.M., E. Dinerstein, E.D. Wikramanayake, N.D. Burgess,
G.V.N. Powell, E.C. Underwood, J.A., D'Amico, I.Itoua, H.E. Strand,
J.C. Morrison, C.J. Loucks, T.F. Allnutt, T.H. Ricketts, Y.Kura,
J.F. Lamoreux, W.W. Wettengel, P.Hedao, and
K.R. Kassem. 2001. "Terrestrial Ecoregions of the World: A New Map of
Life on Earth", in BioScience. 51(11): 935-938.
Ramankutty, N. 2003. Global Grazing Lands Dataset. Center for
Sustainability and the Global Environment (SAGE). University of
Wisconsin, Madison. Data made available through personal
communication.
UNEP-WCMC. 2003. Prototypes of National and International Designated
Protected Areas. Description available at
http://www.unep-wcmc.org/protected_areas/. Data made available through
the Millennium Ecosystem Assessment Intranet (2003).
Wood, S, K. Sebastian and S.J. Scherr. 2000. "Pilot Analysis of Global
Ecosystems: Agroecosystems". World Resources Institute/International
Food Policy Research Institute. Washington D.C.
role of tropical forests in supporting biodiversity and hydrologic
integrity, Ecological Applications, in review.
Global Land Cover Characteristics Database (GLCCD). Version
2.0. 2001. Available online at:
http://edcdaac.usgs.gov/glcc/glcc.html.
International Food Policy Research Institute (IFPRI). 2002. Global
Agricultural Extent v2.0. Available online at:
http://www.asb.cgiar.org/
International Geosphere Biosphere Programme (IGBP). 1998. Data and
Information Systems, IGBP-DIS Global Land Cover Set DISCover.
Olson, D.M., E. Dinerstein, E.D. Wikramanayake, N.D. Burgess,
G.V.N. Powell, E.C. Underwood, J.A., D'Amico, I.Itoua, H.E. Strand,
J.C. Morrison, C.J. Loucks, T.F. Allnutt, T.H. Ricketts, Y.Kura,
J.F. Lamoreux, W.W. Wettengel, P.Hedao, and
K.R. Kassem. 2001. "Terrestrial Ecoregions of the World: A New Map of
Life on Earth", in BioScience. 51(11): 935-938.
Ramankutty, N. 2003. Global Grazing Lands Dataset. Center for
Sustainability and the Global Environment (SAGE). University of
Wisconsin, Madison. Data made available through personal
communication.
UNEP-WCMC. 2003. Prototypes of National and International Designated
Protected Areas. Description available at
http://www.unep-wcmc.org/protected_areas/. Data made available through
the Millennium Ecosystem Assessment Intranet (2003).
Wood, S, K. Sebastian and S.J. Scherr. 2000. "Pilot Analysis of Global
Ecosystems: Agroecosystems". World Resources Institute/International
Food Policy Research Institute. Washington D.C.
Creation and Review Dates
DIF Creation Date:
2005-12-12
Last DIF Revision Date:
2012-11-02
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