The GRanD (v1) 2011 data set is produced with a consortium of partners led by the Global Water System Project in Bonn, Germany. The data incorporates dam point location and reservoir polygons from a variety of sources, creating a global, harmonized account of dams and reservoirs with a storage capacity of more than 0.1 km³. Smaller dams and reservoirs were added if data were available, or if the dam is of particular socioeconomic importance.
There are strong connections between the GRanD data set and the HydroSHEDS database (metadata available through Resource Watch). When multiple dams are associated with one reservoir polygon, the dam with the highest expected rate of outflow from the reservoir, as measured by the HydroSHEDS digital elevation model and flow accumulation measures, is chosen as the main dam. The main source of GRanD reservoir polygons is the SRTM Water Body Database (SWBD), another link between the GRanD and HydroSHEDS data sets. The original dam and reservoir data sets did not include explicit polygon information for many reservoirs. The participating consortium of partners worked to identify reservoir polygons using the SWBD and other tools. Resource Watch shows only a subset of the dataset. For access to the full dataset and additional information, see the Learn More link.
Global Reservoir and Dam Database, Version 1 (Revision 01)
Data results are biased toward public available data, so gaps may exist.
(1) Lehner, B., C. Reidy Liermann, C. Revenga, C. Vorosmarty, B. Fekete, P. Crouzet, P. Doll, M. Endejan, K. Frenken, J. Magome, C. Nilsson, J.C. Robertson, R. Rodel, N. Sindorf, and D. Wisser. 2011. Global Reservoir and Dam Database, Version 1 (GRanDv1): Dams, Revision 01. Palisades, NY: NASA Socioeconomic Data and Applications Center (SEDAC). http://dx.doi.org/10.7927/H4HH6H08. Accessed through Resource Watch, (date). www.resourcewatch.org.
(2) Lehner, B., C. Reidy Liermann, C. Revenga, C. Vörösmarty, B. Fekete, P. Crouzet, P. Döll, M. Endejan, K. Frenken, J. Magome, C. Nilsson, J.C. Robertson, R. Rodel, N. Sindorf, and D. Wisser. 2011. High-Resolution Mapping of the World's Reservoirs and Dams for Sustainable River-Flow Management. Frontiers in Ecology and the Environment 9 (9): 494-502. http://dx.doi.org/10.1890/100125. Accessed through Resource Watch, (date). www.resourcewatch.org.