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Generalized boundaries of the National Water-Quality Assessment (NAWQA) Study-Unit Investigations in the conterminous United States 1991-2001

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Abstract

This is a GENERALIZED version of the boundaries and codes used for the U.S. Geological Survey's National Water-Quality Assessment (NAWQA) Program Study-Unit investigations in the conterminous United States, excluding the High Plains Regional Ground-Water Study. The data set represents the areas studied during the first decade of the NAWQA Program, from 1991-2001 ("cycle 1"). The coverage is intended only for drawing ILLUSTRATIONS, NOT for spatial analysis. The sources of this coverage were the full resolution NAWQA study unit coverage, which is available at http://water.usgs.gov/lookup/getspatial?nawqacyc1 and the coastline from a 1:2 million county coverage generalized for display at the scale of 1:34 million.

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Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Unnumbered Series
Title:
Generalized boundaries of the National Water-Quality Assessment (NAWQA) Study-Unit Investigations in the conterminous United States 1991-2001
Year Published:
2006
Language:
English
Publisher:
U.S. Geological Survey
Publisher location:
Reston, VA
Description:
Dataset
Country:
United States
Online Only (Y/N):
Y
Additional Online Files(Y/N):
N