1. Watershed boundaries (shapefiles), or hydrological units and their physical and erosion related characteristics; 2. Estimated depth represents the relative bathymetry of the U.S. Virgin Islands shallow waters based on Landsat imagery: 3. Indicates the potential threat of sediment delivery and land-based sources of pollution to benthic habitats. This dataset is derived from NOAA's study, the Benthic Habitats of Puerto Rico and the U.S. Virgin Islands: 4. Digital Elevation Model (DEM) was created from the existing U.S. Geological Survey, National Elevation Dataset (NED) by filtering artifacts, converting to the NAD83 datum, edge-matching, and sliver filling of missing data. 5. Steepest downhill descent for each raster cell calculated by the Slope function in ArcGIS; 6. Relative erosion rate by land cover type 2000 were determined from a table; 7. Relative erosion rate by land cover type 1990 were determined from a table; 8. Erodibility of soils (Kffact) based upon soil composition derived from the SSURGO soils data base; 9. Mean annual precipitation (mm), derived from climate data collected at weather stations from 1990-2000 (NOAA Monthly Surface Data, NCDC); 10. Maximum monthly precipitation, derived from monthly precipitation for all available weather stations in U. S. V. I. 11. Watershed outflow points, (areas of maximum flow accumulation within hydrological basins) calculated from FLOWDIRECTION and FLOWACCUMULATION which were derived from the Digital Elevation Model (DEM); 12. topographic slope for Puerto Rico, derived from the U.S. Geological Survey's National Elevation Dataset using various processing and filtering to improve results; 13. Relative Erosion Potential - 2000 (an indicator of sediment and pollution runoff) derived from USGS National Elevation Dataset, NRCS Soils Database and NOAA Monthly Surface Data; 14. Relative Erosion Potential - 1990 derived from USGS National Elevation Dataset, NRCS Soils Database and NOAA Monthly Surface Data; 15. Potential threat of sediment delivery and land-based sources of pollution to coral ecosystems derived from land cover (LC) database (Created by spectral analysis of consistently orthorectified Landsat Thematic Mapper (TM) imagery), USGS National Elevation Dataset, NRCS Soils Database and NOAA Monthly Surface Data; and 16. Relative vulnerability to erosion - 2000 derived from land cover (LC) database (Created by spectral analysis of consistently orthorectified Landsat Thematic Mapper (TM) imagery), USGS National Elevation Dataset, NRCS Soils Database.
National Ocean Service, Center for Coastal Monitoring and Assessment (CCMA), Biogeography Team, 200511, Summit to Sea Characterization of Coastal Watersheds - US Virgin Islands 2005.
Planar coordinates are encoded using Coordinate Pair
Abscissae (x-coordinates) are specified to the nearest 30.0000
Ordinates (y-coordinates) are specified to the nearest 30.0000
Planar coordinates are specified in meters
The horizontal datum used is D_WGS_1984.
The ellipsoid used is WGS_1984.
The semi-major axis of the ellipsoid used is 6378137.000000.
The flattening of the ellipsoid used is 1/298.257224.
NOAA Summit-to-Sea Project, World Resources Institute (WRI)
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To explore the spatial linkages between changes in coral reef ecosystems and land use change, and land-based sources of pollution for U. S. Virgin Islands.
Are there legal restrictions on access or use of the data?
- Access_Constraints: None.
- Acknowledgement of NOAA, National Ocean Service, Center for Coastal Monitoring and Assessment (CCMA), Biogeography Team's Summit to Sea Project will be appreciated. The distribution of this data product by NOAA does not constitute any real or implied responsibility for its accuracy or usefulness. Map products should not be used for navigation.
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NOAA makes no warranty regarding these data, expressed or implied, nor does the fact of distribution constitute such a warranty. NOAA can not assume liability for and damages caused by any errors or omissions in these data, nor as a result of the failure of these data to function on a particular system.
|Data format:||ArcGIS digital vector (shapefiles) and digital raster files|
|Media you can order:||
(format ISO 9660)
|Data format:||ArcGIS digital vector (shapefiles) and raster files|
301 713 3000 x137 (voice)