This data set is a subset of Cogley's 1998 global hydrographic data set (GGHYDRO, Release 2.2). The subset was created for the study area of the Large Scale Biosphere-Atmosphere Experiment in Amazonia (LBA) in South America (i.e., latitude 10° N to 25° S, longitude 30° to 85° W). The subset is organized into 19 files containing terrain type, stream frequency counts, major drainage basins, and annual water runoff for the LBA study area. The data are presented at a spatial resolution of 1-degree latitude by 1-degree longitude in ASCII GRID file format.
Further information about the data can be found at http://daac.ornl.gov/daacdata/lba/surf_hydro_and_water_chem/gghydro/comp/gghydro_readme.pdf.
LBA was a cooperative international research initiative led by Brazil. NASA was a lead sponsor for several experiments. LBA was designed to create the new knowledge needed to understand the climatological, ecological, biogeochemical, and hydrological functioning of Amazonia; the impact of land use change on these functions; and the interactions between Amazonia and the Earth system. More information about LBA can be found at http://www.daac.ornl.gov/LBA/misc_amazon.html.
Cite this data set as follows:
Cogley, J. G. 2003. LBA Regional Hydrographic Data, 1-Degree, Release 2.2 (Cogley). Data set. Available on-line [http://www.daac.ornl.gov] from Oak Ridge National Laboratory Distributed Active Archive Center, Oak Ridge, Tennessee, U.S.A. doi:10.3334/ORNLDAAC/676.
Cogley, J. G. 1998. GGHYDROGlobal Hydrographic Data, Release 2.2. Trent Climate Note 98-1. Department of Geography, Trent University, Peterborough, Ontario, Canada.
Information about the data format, legend, and the procedure used to create the LBA subset are in the following file: http://daac.ornl.gov/daacdata/lba/surf_hydro_and_water_chem/gghydro/comp/gghydro_readme.pdf.