GRanD Database
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The Global Reservoir and Dam (GRanD) Database provides the location and main specifications of large global reservoirs and dams with a storage capacity of more than 0.1km³ both in point and polygon format. The current version 1.1 of GRanD contains 6,862 records of reservoirs with a cumulative storage capacity of 6,197km³ and their attribute data. The development of GRanD primarily aimed at compiling the available reservoir and dam information, correcting it through extensive cross-validation, error checking and identification of duplicate records, attribute conflicts or mismatches; and completing missing information from new sources or statistical approaches. The dams were geospatially referenced and assigned to polygons depicting reservoirs outlines at high spatial resolution.

Map description and dataset provided by: Department of Geography, Mc Gill University, Montreal, Canada

DescriptionGRanD Database

The Global Water System Project (GWSP) initiated an international effort to collate existing dam and reservoir data with the aim of providing a single, geographically explicit and reliable database for the scientific community. The development of GRanD primarily aimed at compiling the available reservoir and dam information; correcting it through extensive cross-validation, error checking, and identification of duplicate records, attribute conflicts, or mismatches; and completing missing information from new sources or statistical approaches. The dams were geospatially referenced and assigned to polygons depicting reservoir outlines at high spatial resolution.

Interpretation

GRanD shows the global distribution of large dams and reservoirs. The current version 1.1 contains 6,862 records of reservoirs and their associated dams, with a cumulative storage capacity of 6,197 km3. While the main focus was to include all reservoirs with a storage capacity of more than 0.1 km3, many smaller reservoirs were added if data were available.

Source

The dataset for this map was provided by: Bernhard Lehner, Department of Geography, Mc Gill University, Montreal, Canada

Background

The development of the GRanD database has been coordinated by the Global Water System Project, Bonn, Germany, and has been executed in partnership and collaboration between members of the following institutes and organizations: Department of Geography, McGill University, Montreal, QC, Canada; The CUNY Environmental Cross-Roads Initiative, City University of New York, NY, USA; University of New Hampshire, Durham, NH, USA; University of Washington, Seattle, WA, USA; The Nature Conservancy, Arlington, VA, USA; Conservation Science Program, World Wildlife Fund, Washington, DC, USA; European Environment Agency, Copenhagen, Denmark; Food and Agriculture Organization of the United Nations, Rome, Italy; University of Yamanashi, Japan; University of Greifswald, Germany; University of Frankfurt, Germany; and Department of Ecology and Environmental Science, Umeå University, Sweden. Please refer to the respective article for more information: Lehner, B., Reidy Liermann, C., Revenga, C., Vörösmarty, C., Fekete, B., Crouzet, P., Döll, P., Endejan, M., Frenken, K., Magome, J., Nilsson, C., Robertson, J., Rödel, R., Sindorf, N., Wisser, D. (in press): High resolution mapping of the world’s reservoirs and dams for sustainable river flow management, in: Frontiers in Ecology and the Environment.

Citation

Please cite this map as: "Lehner, B., R-Liermann, C., Revenga, C., Vörösmarty, C., Fekete, B., Crouzet, P., Döll, P. et al.: High resolution mapping of the world’s reservoirs and dams for sustainable river flow management. Frontiers in Ecology and the Environment. Source: GWSP Digital Water Atlas (2008). Map 81: GRanD Database (V1.0). Available online at http://atlas.gwsp.org."

Contact Information

Bernhard Lehner, This e-mail address is being protected from spam bots, you need JavaScript enabled to view it