Gregory E Schwarz (Former Employee)
Science and Products
Filter Total Items: 68
A spatially referenced regression model (SPARROW) for suspended sediment in streams of the Conterminous U.S. A spatially referenced regression model (SPARROW) for suspended sediment in streams of the Conterminous U.S.
Suspended sediment has long been recognized as an important contaminant affecting water resources. Besides its direct role in determining water clarity, bridge scour and reservoir storage, sediment serves as a vehicle for the transport of many binding contaminants, including nutrients, trace metals, semi-volatile organic compounds, a nd numerous pesticides (U.S. Environmental Protection...
Authors
Gregory E. Schwarz, Richard A. Smith, Richard B. Alexander, John R. Gray
Price current-meter standard rating development by the U.S. geological survey Price current-meter standard rating development by the U.S. geological survey
The U.S. Geological Survey has developed new standard rating tables for use with Price type AA and pygmy current meters, which are employed to measure streamflow velocity. Current-meter calibration data, consisting of the rates of rotation of meters at several different constant water velocities, have shown that the original rating tables are no longer representative of the average...
Authors
E. F. Hubbard, G. E. Schwarz, K.G. Thibodeaux, L.M. Turcios
A comparison of load estimates using total suspended solids and suspended-sediment concentration data A comparison of load estimates using total suspended solids and suspended-sediment concentration data
This paper presents the results to-date from a continuing investigation into the differences between total suspended solids (TSS) and suspended-sediment concentration (SSC) data and the ramifications of using each type of data to estimate sediment loads. It compares estimates of annual suspended-sediment loads that were made using regression equations developed from paired TSS and SSC...
Authors
G.D. Glysson, J. R. Gray, G. E. Schwarz
A field and statistical modeling study to estimate irrigation water use at Benchmark Farms study sites in southwestern Georgia, 1995-96 A field and statistical modeling study to estimate irrigation water use at Benchmark Farms study sites in southwestern Georgia, 1995-96
A benchmark irrigation monitoring network of farms located in a 32-county area in southwestern Georgia was established in 1995 to improve estimates of irrigation water use. A stratified random sample of 500 permitted irrigators was selected from a data base--maintained by the Georgia Department of Natural Resources, Georgia Environmental Protection Division, Water Resources Management...
Authors
Julia L. Fanning, Gregory E. Schwarz, William C. Lewis
Details of current-meter rating table development by the U.S. Geological Survey Details of current-meter rating table development by the U.S. Geological Survey
No abstract available.
Authors
Ernest F. Hubbard, Gregory E. Schwarz, Kirk G. Thibodeaux, Lisa M. Turcios
Comparability of suspended-sediment concentration and total suspended solids data Comparability of suspended-sediment concentration and total suspended solids data
Two laboratory analytical methods — suspended-sediment concentration (SSC) and total suspended solids (TSS) — are predominantly used to quantify concentrations of suspended solid-phase material in surface waters of the United States. The analytical methods differ. SSC data are produced by measuring the dry weight of all the sediment from a known volume of a water-sediment mixture. TSS...
Authors
John R. Gray, G.D. Glysson, L.M. Turcios, G. E. Schwarz
Science and Products
Filter Total Items: 68
A spatially referenced regression model (SPARROW) for suspended sediment in streams of the Conterminous U.S. A spatially referenced regression model (SPARROW) for suspended sediment in streams of the Conterminous U.S.
Suspended sediment has long been recognized as an important contaminant affecting water resources. Besides its direct role in determining water clarity, bridge scour and reservoir storage, sediment serves as a vehicle for the transport of many binding contaminants, including nutrients, trace metals, semi-volatile organic compounds, a nd numerous pesticides (U.S. Environmental Protection...
Authors
Gregory E. Schwarz, Richard A. Smith, Richard B. Alexander, John R. Gray
Price current-meter standard rating development by the U.S. geological survey Price current-meter standard rating development by the U.S. geological survey
The U.S. Geological Survey has developed new standard rating tables for use with Price type AA and pygmy current meters, which are employed to measure streamflow velocity. Current-meter calibration data, consisting of the rates of rotation of meters at several different constant water velocities, have shown that the original rating tables are no longer representative of the average...
Authors
E. F. Hubbard, G. E. Schwarz, K.G. Thibodeaux, L.M. Turcios
A comparison of load estimates using total suspended solids and suspended-sediment concentration data A comparison of load estimates using total suspended solids and suspended-sediment concentration data
This paper presents the results to-date from a continuing investigation into the differences between total suspended solids (TSS) and suspended-sediment concentration (SSC) data and the ramifications of using each type of data to estimate sediment loads. It compares estimates of annual suspended-sediment loads that were made using regression equations developed from paired TSS and SSC...
Authors
G.D. Glysson, J. R. Gray, G. E. Schwarz
A field and statistical modeling study to estimate irrigation water use at Benchmark Farms study sites in southwestern Georgia, 1995-96 A field and statistical modeling study to estimate irrigation water use at Benchmark Farms study sites in southwestern Georgia, 1995-96
A benchmark irrigation monitoring network of farms located in a 32-county area in southwestern Georgia was established in 1995 to improve estimates of irrigation water use. A stratified random sample of 500 permitted irrigators was selected from a data base--maintained by the Georgia Department of Natural Resources, Georgia Environmental Protection Division, Water Resources Management...
Authors
Julia L. Fanning, Gregory E. Schwarz, William C. Lewis
Details of current-meter rating table development by the U.S. Geological Survey Details of current-meter rating table development by the U.S. Geological Survey
No abstract available.
Authors
Ernest F. Hubbard, Gregory E. Schwarz, Kirk G. Thibodeaux, Lisa M. Turcios
Comparability of suspended-sediment concentration and total suspended solids data Comparability of suspended-sediment concentration and total suspended solids data
Two laboratory analytical methods — suspended-sediment concentration (SSC) and total suspended solids (TSS) — are predominantly used to quantify concentrations of suspended solid-phase material in surface waters of the United States. The analytical methods differ. SSC data are produced by measuring the dry weight of all the sediment from a known volume of a water-sediment mixture. TSS...
Authors
John R. Gray, G.D. Glysson, L.M. Turcios, G. E. Schwarz