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U.S. Geological Survey

Data Series 152

National Water-Quality Assessment Program

 
   

Water-Quality, Streamflow, and Ancillary Data for Nutrients in Streams and Rivers Across the Nation, 1992–2001

 
By David K. Mueller and Norman E. Spahr

Introduction

Sample Collection and Laboratory Analysis

Compilation of Environmental Sample Data
Review and Revision of Environmental Sample Data
Modification to Data Censoring
Estimation of Nutrient Loads
Summary Statistics
Ancillary Data
References Cited
Data Files

Data Files

Map showing study-unit boundaries and defining study-unit abbreviations

Data set Brief description
Environmental samples Nutrient samples, including selected other data, collected during water years 1992–2001 at NAWQA stream and river sampling sites (19,098 Kilobytes)
Load-model coefficients Regression coefficients and selected diagnostics for models of nutrient loads at NAWQA sampling sites (468 Kilobytes)
Daily streamflow Daily values of streamflow used to estimate nutrient loads for selected water years at NAWQA sampling sites. Due to the amount of data, streamflow files were separated into groups organized by year in which the study unit began investigations and region of the country.

1991 Group

File 1 Eastern study units ACFB, ALBE, CONN, GAFL, HDSN, LSUS, POTO (6,003 Kilobytes)
File 2 Central study units CNBR, OZRK, REDN, SPLT, TRIN, WHIT,WMIC (6,998 Kilobytes)
File 3 Western study units CCPT, NVBR, RIOG, SANJ, USNK, WILL (5,435 Kilobytes)

1994 Group

File 1 Eastern study units ALMN, KANA, LERI, LINJ, SANT, SOFL, UTEN (6,274 Kilobytes)
File 2 Central study units EIWA, LIRB, MISE, SCTX, UMIS (4,136 Kilobytes)
File 3 Western study unit CAZB, PUGT, SACR, UCOL (3,891 Kilobytes)

1997 Group

File 1 Eastern study units ACAD, DELR, DLMV, LTEN, MIAM, MOBL, NECB, UIRB (5,335 Kilobytes)
File 2 Western study unit COOK, GRSL, NROK, OAHU, SANA, YAKI, YELL (4,175 Kilobytes)
Summary data Mean annual loads, yields, and concentrations of five nutrient constituents, plus selected ancillary data, at NAWQA sampling sites (592 Kilobytes)