Shapefiles of basin boundaries are provided for spatial reference. These shapefiles are in geographic coordinates
The basin boundaries were derived using automated DEM processing procedures to derive flow directions (link to
flowdirectionhtml.doc) and then delineating basin boundaries from the flow direction grids. Although the DEM processing and
basin boundaries were derived in projected space, the Shapefiles provided here were transformed back into geographic coordinates
to be more suitable for general use.
The shapefile for the Oklahoma basins includes six of the parent basins to describe the spatial extent but does not delineate
all the interior basins in the study
Sierra Nevada basins:
There are three shapefiles for the Sierra Nevada area. One for the North Fork of the American River, one for the Carson River
above the Markleeville gage and one for the Carson River above the Gardnerville gage.