Publications
Publications
Filter Total Items: 1258
Evaluation of immunoassay for the determination of pesticides at a large-scale groundwater contamination site Evaluation of immunoassay for the determination of pesticides at a large-scale groundwater contamination site
Pesticide concentrations in ground water at Rocky Mountain Arsenal (RMA) near Denver, Colorado, were determined using solid-phase extraction (SPE) gas chromatography/mass spectrometry (GC/MS) procedures and enzyme-linked immunosorbent assay (ELISA) for cyclodiene insecticides and triazine herbicides. Matrix interferences resulted in inconclusive results for some GC/MS analyses due to...
Authors
T. R. Dombrowski, E.M. Thurman, G. B. Mohrman
The deethylatrazine/atrazine ratio as an indicator of the onset of the spring flush of herbicides into surface water of the midwestern United States The deethylatrazine/atrazine ratio as an indicator of the onset of the spring flush of herbicides into surface water of the midwestern United States
[No abstract available]
Authors
E.M. Thurman, J. D. Fallon
Cyanazine, atrazine, and their metabolites as geochemical indicators of contaminant transport in the Mississippi River Cyanazine, atrazine, and their metabolites as geochemical indicators of contaminant transport in the Mississippi River
The geochemical transport of cyanazine and its metabolite cyanazine amide (CAM) was compared to atrazine and its metabolite deethylatrazine (DEA) at three sites in the Mississippi River basin during 1992 and six sites during 1993. The floods of 1993 caused an uninterrupted exponential decline in herbicide concentrations; whereas, in 1992 herbicide concentrations varied mostly in response...
Authors
M. T. Meyer, E.M. Thurman, D. A. Goolsby
Effects of pumping municipal wells at Junction City, Kansas, on streamflow in the Republican River, Northeast Kansas, 1992-94 Effects of pumping municipal wells at Junction City, Kansas, on streamflow in the Republican River, Northeast Kansas, 1992-94
A digital ground-water flow model was developed to simulate steady-state and transient effects of municipal well pumping from an alluvial aquifer on streamflow in the Republican River near Junction City, Kansas. Seepage survey results indicated that streamflow loss in the vicinity of the municipal well field ranged from 1 to 5 ft3/s (cubic feet per second). Simulations of May 1993...
Authors
N. C. Myers, Xiaodong Jian, G.D. Hargadine
Concentrations and transport of atrazine in the Delaware River-Perry Lake system, northeast Kansas, July 1993 through September 1995 Concentrations and transport of atrazine in the Delaware River-Perry Lake system, northeast Kansas, July 1993 through September 1995
A study of the distribution and transport of atrazine in surface water in the 1,117 square-mile Delaware River Basin in northeast Kansas was conducted from July 1992 through September 1995. The purpose of this report is to present information to assess the present (1992-95) conditions and possible future changes in the distribution and magnitude of atrazine concentrations, loads, and...
Authors
L. M. Pope, L.D. Brewer, G.A. Foley, S.C. Morgan
Changes in high-flow frequency and channel geometry of the Neosho River downstream from John Redmond Dam, southeastern Kansas Changes in high-flow frequency and channel geometry of the Neosho River downstream from John Redmond Dam, southeastern Kansas
The streamflow regimen of the Neosho River downstream from John Redmond Dam in southeastern Kansas has changed significantly since the dam's completion in 1964. The controlled releases from the dam have decreased the magnitudes of peak discharges and increased the magnitudes of low discharges. The trends in river stage for selected discharges also have changed at two of the streamflow...
Authors
S.E. Studley
U.S. Geological Survey Programs in Kansas U.S. Geological Survey Programs in Kansas
No abstract available.
Authors
Water Resources Division U.S. Geological Survey
Occurrence of selected pesticides and their metabolites in near-surface aquifers of the midwestern United States Occurrence of selected pesticides and their metabolites in near-surface aquifers of the midwestern United States
The occurrence and distribution of selected pesticides and their metabolites were investigated through the collection of 837 water-quality samples from 303 wells across the Midwest. Results of this study showed that five of the six most frequently detected compounds were pesticide metabolites. Thus, it was common for a metabolite to be found more frequently in groundwater than its parent...
Authors
D.W. Kolpin, Thurman E. Michael, D. A. Goolsby
Identification of a new sulfonic acid metabolite of metolachlor in soil Identification of a new sulfonic acid metabolite of metolachlor in soil
An ethanesulfonic acid metabolite of metolachlor (metolachlor ESA) was identified in soil-sample extracts by negative-ion, fast-atom bombardment mass spectrometry (FAB-MS) and FAB tandem mass spectrometry (FAB-MS/MS). Production fragments from MS/MS analysis of the deprotonated molecular ion of metolachlor ESA in the soil extract can be reconciled with the structure of the synthesized...
Authors
D.S. Aga, E.M. Thurman, M.E. Yockel, L.R. Zimmerman, T.D. Williams
Digital maps of the extent, base, and potentiometric surface of the glacial-drift aquifers in Kansas Digital maps of the extent, base, and potentiometric surface of the glacial-drift aquifers in Kansas
No abstract available.
Authors
K. E. Juracek, C. V. Hansen, C.M. Logan
Water Resources Data, Kansas, Water Year 1995 Water Resources Data, Kansas, Water Year 1995
No abstract available.
Authors
J.E. Putnam, D.L. Lacock, D.R. Schneider, M.D. Carlson, B.J. Dague
Concentrations of selected herbicides, herbicide metabolites, and nutrients in outflow from selected midwestern reservoirs, April 1992 through September 1993 Concentrations of selected herbicides, herbicide metabolites, and nutrients in outflow from selected midwestern reservoirs, April 1992 through September 1993
This data set consists of digital aquifer boundaries for the High Plains aquifer in the central United States. The High Plains aquifer extends from south of 32 degrees to almost 45 degrees north latitude and from 96 degrees 30 minutes to almost 104 degrees west longitude. The area covers 174,000 square miles and is present in Texas, Oklahoma, New Mexico, Kansas, Colorado, Nebraska...
Authors
E.A. Scribner, D. A. Goolsby, E.M. Thurman, M. T. Meyer, W.A. Battaglin