Publications
Publications
Filter Total Items: 1263
Nuclear magnetic resonance identification of new sulfonic acid metabolites of chloroacetanilide herbicides Nuclear magnetic resonance identification of new sulfonic acid metabolites of chloroacetanilide herbicides
The detection of the sulfonic acid metabolites of the chloroacetanilide herbicides acetochlor, alachlor, butachlor, propachlor, and, more recently, metolachlor in surface and ground water suggests that a common mechanism for dechlorination exists via the glutathione conjugation pathway. The identification of these herbicides and their metabolites is important due to growing public...
Authors
M.D. Morton, F.H. Walters, D.S. Aga, E.M. Thurman, C.K. Larive
Occurrence of selected herbicides and herbicide degradation products in Iowa's Ground Water, 1995 Occurrence of selected herbicides and herbicide degradation products in Iowa's Ground Water, 1995
Herbicide compounds were prevalent in ground water across Iowa, being detected in 70% of the 106 municipal wells sampled during the summer of 1995. Herbicide degradation products were three of the four most frequently detected compounds for this study. The degradation product alachlor ethanesulfonic acid was the most frequently detected compound (65.1%), followed by atrazine (40.6%), and...
Authors
D.W. Kolpin, S. J. Kalkhoff, D. A. Goolsby, D. A. Sneck-Fahrer, E.M. Thurman
Increased Use of Cheney Reservoir for Wichita Area Water Supply Benefits Equus Beds Aquifer Increased Use of Cheney Reservoir for Wichita Area Water Supply Benefits Equus Beds Aquifer
No abstract available.
Authors
Heather C. Ross, Nathan C. Myers, Walter R. Aucott
Geohydrology and simulation of steady-state flow conditions in regional aquifer systems in Cretaceous and older rocks underlying Kansas, Nebraska, and parts of Arkansas, Colorado, Missouri, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming Geohydrology and simulation of steady-state flow conditions in regional aquifer systems in Cretaceous and older rocks underlying Kansas, Nebraska, and parts of Arkansas, Colorado, Missouri, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming
Three regional aquifers systems are the basis for describing the geohydrology of bedrock aquifers in the central United States. The Great Plains aquifer system, composed of Lower Cretaceous sandstone, generally contains brackish water (1,000 to 10,000 milligrams per liter dissolved solids); the Western Interior Plains aquifer system of lower Paleozoic rocks contains saline water and is...
Authors
D. C. Signor, J. O. Helgesen, D. G. Jorgensen, R. B. Leonard
Identification of ionic chloroacetanilide-herbicide metabolites in surface water and groundwater by HPLC/MS using negative ion spray Identification of ionic chloroacetanilide-herbicide metabolites in surface water and groundwater by HPLC/MS using negative ion spray
Solid-phase extraction (SPE) was combined with high-performance liquid chromatography/high-flow pneumatically assisted electrospray mass spectrometry (HPLC/ESP/MS) for the trace analysis of oxanilic and sulfonic acids of acetochlor, alachlor, and metolachlor. The isolation procedure separated the chloroacetanilide metabolites from the parent herbicides during the elution from C18...
Authors
Imma Ferrer, E.M. Thurman, Damia Barcelo
A study of the temporal variability of atrazine in private well water. Part I: Study design, implementation, and database development A study of the temporal variability of atrazine in private well water. Part I: Study design, implementation, and database development
In 1988, the Iowa Department of Natural Resources, along with the University of Iowa conducted the Statewide Rural Well Water Survey, commonly known as SWRL. A total of 686 private rural drinking water wells was selected by use of a probability sample and tested for pesticides and nitrates. Sixty-eight of these wells, the '10% repeat' wells, were additionally sampled in October, 1990 and...
Authors
M. Lorber, Kevin Johnson, B. Kross, P. Pinsky, L. Burmeister, M. Thurman, A. Wilkins, G. Hallberg
Water Resources Data, Kansas, Water Year 1996 Water Resources Data, Kansas, Water Year 1996
No abstract available.
Authors
J.E. Putnam, D.L. Lacock, D.R. Schneider, M.D. Carlson, B.J. Dague
Hydrologic and chemical interaction of the Arkansas River and the Equus Beds aquifer between Hutchinson and Wichita, south-central Kansas Hydrologic and chemical interaction of the Arkansas River and the Equus Beds aquifer between Hutchinson and Wichita, south-central Kansas
Large chloride concentrations in Arkansas River water have the potential to degrade water quality in the adjacent Equus beds aquifer between Hutchinson and Wichita, Kansas. The aquifer is an important source of water for municipal, industrial, agricultural, and domestic uses. A three-dimensional, finite-difference, ground-water flow-model program (MODFLOW) was used with data from past...
Authors
N. C. Myers, G.D. Hargadine, Joe B. Gillespie
Water-quality assessment of the Ozark Plateaus study unit, Arkansas, Kansas, Missouri, and Oklahoma — Summary of information on pesticides, 1970–90 Water-quality assessment of the Ozark Plateaus study unit, Arkansas, Kansas, Missouri, and Oklahoma — Summary of information on pesticides, 1970–90
Historical pesticide data from 1970-90 were compiled for 140 surface-water, 92 ground-water, 55 streambed-sediment, and 120 biological-tissue sampling sites within the Ozark Plateaus National Water-Quality Assessment Program study unit. Surface-water, bed-sediment, and biological-tissue sites have drainage basins predominantly in the Springfield and Salem Plateaus; ground-water sites are
Authors
Richard W. Bell, Robert L. Joseph, David A. Freiwald
Water-level changes in the High Plains Aquifer: Predevelopment to 1994 Water-level changes in the High Plains Aquifer: Predevelopment to 1994
No abstract available.
Authors
Jack T. Dugan, Jennifer B. Sharpe
Surface-water-quality assessment of the lower Kansas River basin, Kansas and Nebraska: Selected metals, arsenic, and phosphorus in streambed sediments of first- and second-order streams, 1987 Surface-water-quality assessment of the lower Kansas River basin, Kansas and Nebraska: Selected metals, arsenic, and phosphorus in streambed sediments of first- and second-order streams, 1987
The occurrence and geographic distribution of major metals and trace elements was assessed in the lower Kansas River Basin of Kansas and Nebraska by studying the concentrations of metals and nonmetallic elements in the less-than 63-micrometer-sized fraction of streambedsediment samples from 422 sites on first- and second-order streams. Median concentrations were the same order of...
Authors
D. Q. Tanner, J. L. Ryder