Ronald B Zelt, P.HWQ. (Former Employee)
Science and Products
Filter Total Items: 30
Isopachs of Quaternary deposits, Fremont 1- by 2- degree Quadrangle and part of Omaha Quadrangle, Nebraska, digitized from a published 1:250,000-scale geologic map
A geologic map showing the isopachs of Quaternary deposits in the Fremont and part of the Omaha, Nebraska, 1- by 2-degree quadrangles was published at a scale of 1:250,000 in 1975 (Burchett and others, 1975). This report describes the conversion of Quaternary thickness data into a digital geographic data set. A film separation of the published isopachs was scan-digitized and processed to produce d
Authors
R. B. Zelt, E.J. Patton
Validation of national land-cover characteristics data for regional water-quality assessment
Land-cover information is used routinely to support the interpretation of water-quality data. The Prototype 1990 Conterminous US Land Cover Characteristics Data Set, developed primarily from Advanced Very High Resolution Radiometer (AVHRR) data, was made available to the US Geological Survey's National Water-Quality Assessment (NAWQA) Program. The study described in this paper explored the utility
Authors
Ronald B. Zelt, Jesslyn F. Brown, M.S. Kelley
Water-level changes in the High Plains aquifer -- Predevelopment to 1992
Changes in water levels in the High Plains aquifet underlying parts of Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming result from the variability of precipitation, land use, and ground-water withdrawals. From the beginning of development of the High Plains aquifer to 1980, water levels declined throughout much of the area; the declines exceeded 100 feet in parts
Authors
J. T. Dugan, T. J. McGrath, R. B. Zelt
Organonitrogen herbicides in the lower Kansas River basin
Atrazine, which is not readily removed by conventional treatment, may cause problems for water utilities in agricultural areas.To help managers, planners, and regulators determine when and where surface waters are likely to be adversely affected by organonitrogen herbicides, the authors analyzed various data on the distribution of these compounds in the lower Kansas River basin. They found that at
Authors
John K. Stamer, Ronald B. Zelt
Water-quality assessment of the central Nebraska basins; summary of data for recent conditions through 1990
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 con
Authors
R. B. Zelt, P. R. Jordan
Surface water-quality assessment of the lower Kansas River basin, Kansas and Nebraska; concentrations of major metals and trace elements in streambed sediments, 1987
No abstract available.
Authors
D. Q. Tanner, R.F. Sanzolone, R. B. Zelt
Science and Products
Filter Total Items: 30
Isopachs of Quaternary deposits, Fremont 1- by 2- degree Quadrangle and part of Omaha Quadrangle, Nebraska, digitized from a published 1:250,000-scale geologic map
A geologic map showing the isopachs of Quaternary deposits in the Fremont and part of the Omaha, Nebraska, 1- by 2-degree quadrangles was published at a scale of 1:250,000 in 1975 (Burchett and others, 1975). This report describes the conversion of Quaternary thickness data into a digital geographic data set. A film separation of the published isopachs was scan-digitized and processed to produce d
Authors
R. B. Zelt, E.J. Patton
Validation of national land-cover characteristics data for regional water-quality assessment
Land-cover information is used routinely to support the interpretation of water-quality data. The Prototype 1990 Conterminous US Land Cover Characteristics Data Set, developed primarily from Advanced Very High Resolution Radiometer (AVHRR) data, was made available to the US Geological Survey's National Water-Quality Assessment (NAWQA) Program. The study described in this paper explored the utility
Authors
Ronald B. Zelt, Jesslyn F. Brown, M.S. Kelley
Water-level changes in the High Plains aquifer -- Predevelopment to 1992
Changes in water levels in the High Plains aquifet underlying parts of Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming result from the variability of precipitation, land use, and ground-water withdrawals. From the beginning of development of the High Plains aquifer to 1980, water levels declined throughout much of the area; the declines exceeded 100 feet in parts
Authors
J. T. Dugan, T. J. McGrath, R. B. Zelt
Organonitrogen herbicides in the lower Kansas River basin
Atrazine, which is not readily removed by conventional treatment, may cause problems for water utilities in agricultural areas.To help managers, planners, and regulators determine when and where surface waters are likely to be adversely affected by organonitrogen herbicides, the authors analyzed various data on the distribution of these compounds in the lower Kansas River basin. They found that at
Authors
John K. Stamer, Ronald B. Zelt
Water-quality assessment of the central Nebraska basins; summary of data for recent conditions through 1990
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 con
Authors
R. B. Zelt, P. R. Jordan
Surface water-quality assessment of the lower Kansas River basin, Kansas and Nebraska; concentrations of major metals and trace elements in streambed sediments, 1987
No abstract available.
Authors
D. Q. Tanner, R.F. Sanzolone, R. B. Zelt