Water-quality assessment of the central Nebraska basins; summary of data for recent conditions through 1990
Open-File Report
93-422
By: R. B. Zelt and P. R. Jordan
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Abstract
Among the first activities undertaken in each National Water-Quality Assessment (NAWQA) program study-unit investigation are compilation, screening, and statistical summary of available data concerning recent, general water-quality conditions in the study unit. This report (1) identifies which of the existing water-quality data are suitable for characterizing general conditions in a nationally consistent manner and (2) describes, to the extent possible, recent, general water-quality conditions in the Central Nebraska Basins. The study unit con- sists of the area drained by the Platte River between the confluence of the North Platte and South Platte Rivers near North Platte downstream to its confluence with the Missouri River south of Omaha. The report includes (1) a description of the sources and characteristics of water-quality data that are available, (2) a description of the approach used for screening data to identify a subset of the data suitable for summary and comparisons, (3) a presen- tation of the results of statistical and graphical summaries of recent, general water-quality con- ditions, and (4) comparisons of recent, general water-quality conditions to established national water-quality criteria, where applicable. Stream- and lake-water data are summarized for selected sampling sites, and data are summarized by major subunits of the study unit (the Sandhills, Loess Hills, Glaciated Area, and Platte Valley subunits) for streambed-sediment, fish-tissue, aquatic- ecological, and ground-water data. The summaries focus on the central tendencies and typical variation in the data and use nonparametric statistics such as frequencies and percentile values.
Suggested Citation
Zelt, R.B., Jordan, P.R., 1993, Water-quality assessment of the central Nebraska basins; summary of data for recent conditions through 1990: U.S. Geological Survey Open-File Report 93-422, viii, 178 p. :ill., maps ;28 cm., https://doi.org/10.3133/ofr93422.
ISSN: 2331-1258 (online)
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Water-quality assessment of the central Nebraska basins; summary of data for recent conditions through 1990 |
| Series title | Open-File Report |
| Series number | 93-422 |
| DOI | 10.3133/ofr93422 |
| Year Published | 1993 |
| Language | ENGLISH |
| Publisher | U.S. Geological Survey ; Books and Open-File Reports [distributor], |
| Description | viii, 178 p. :ill., maps ;28 cm. |