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Water-quality, streamflow, and ancillary data for nutrients in streams and rivers across the nation, 1992-2001

Data Series 152

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Abstract

Introduction: This report is the companion data report for: Nutrients in Streams and Rivers Across the Nation - 1992-2001 (D.K. Mueller and N.E. Spahr, U.S. Geological Survey written commun., 2005). The data contained in this report were collected as part of the National Water-Quality Assessment (NAWQA) Program. Investigations were conducted in 51 large river basins and aquifer systems, which are referred to as 'study units.' Implementation of study-unit investigations were phased so that high-intensity sampling occurred in about one-third of the study units at a time. Investigations in the first 20 study units began in 1991, and stream sampling began in 1992; however, most samples were collected during water years 1993-95. (Water year is defined as the period from October through September and is identified by the year in which it ends.) A second group of 16 study-unit investigations began in 1994, with most of the sampling completed during water years 1996-98. A third group, consisting of 15 study units, began in 1997 with most of the data collected during water years 1999-2001. At some sites, additional sampling continued after the high-intensity time period. Gilliom and others (1995) provide additional information about study-unit sampling design. Additional information about the NAWQA program is available at http://water.usgs.gov/nawqa/index.html.

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Water-quality, streamflow, and ancillary data for nutrients in streams and rivers across the nation, 1992-2001
Series title:
Data Series
Series number:
152
Edition:
Online only
Year Published:
2005
Language:
ENGLISH
Description:
unpaginated; map; data files
Online Only (Y/N):
Y
Additional Online Files(Y/N):
Y