Skip to main content
USGS - science for a changing world

BLM REA NGB 2011 Groundwater Decline Snails in the Northern Great Basin


Groundwater Levels were taken from USGS Groundwater monitoring wells and used to determine the average change in groundwater elevation. Groundwater level changes were intersected with the HUC 12 watersheds and average for the HUC 12.This data set is a complete digital hydrologic unit boundary layer to the Subwatershed (12-digit) 6th level for the entire United States. This data set consists of geo-referenced digital data and associated attributes created in accordance with the "Federal Guidelines, Requirements, and Procedures for the National Watershed Boundary Dataset; Chapter 3 of Section A, Federal Standards, Book 11, Collection and Delineation of Spatial Data; Techniques and Methods 11-A3" (04/01/2009). [...]

Additional Information


Type Scheme Key
sourceSystem urn:x-esri:specification:ServiceType:ArcIMS:Metadata:DocID {A71FDD94-4672-48DC-9602-A3DE980E3E2E}

Item Actions

View Item as ...

Save Item as ...

View Item...