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32 records found for author name Helgesen, J.O..
Title: Geohydrology and simulation of steady-state flow conditions in regional aquifer systems in Cretaceous and old rocks underlying Kansas, Nebraska, and parts of Arkansas, Colorado, Missouri, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming
Author: Signor, D.C.; Helgesen, J.O.; Jorgensen, D.G.; and Leonard, R.B.
Publication: U.S. Geological Survey, Professional Paper, no. 1414-C, 105 pages
Year: 1997

Title: Transport of chloride and atrazine through the unsaturated zone beneath two irrigated fields in south-central Kansas, (abstr.), In, Pederson, G.L.; and Smith, M.M., (compls.); U.S. Geological Survey second national symposium on water quality, abstracts of the technical session
Author: Rutledge, A.T.; and Helgesen, J.O.
Publication: U.S. Geological Survey, Open-file Report, no. 89-0409, 150 pages
Year: 1989

Title: Description of data files compiled for the Central Midwest Regional Aquifer-System Analysis
Author: Helgesen, J.O.; and Hansen, C.V.
Publication: U.S. Geological Survey, Open-file Report, no. 89-0042, 37 pages
Year: 1989

Title: Surface-water-quality assessment of the Lower Kansas River basin, Kansas and Nebraska; results of investigations, 1987-90
Author: Helgesen, J.O., (editor)
Publication: U.S. Geological Survey, Open-file Report, no. 94-0365, 129 pages
Year: 1995

Title: Overview of nonpoint-source contamination of the High Plains aquifer in south-central Kansas, (abstr.), p. 46, In, Mallard, G.E.; and Aronson, D.A., (compls.); U.S. Geological Survey Toxic Substances Hydrology Program; abstracts of the technical meeting
Author: Helgesen, J.O.; Stullken, L.E.; and Rutledge, A.T.
Publication: U.S. Geological Survey, Open-file Report, no. 91-0088, 133 pages
Year: 1991

Title: Assessment of nonpoint-source contamination of the High Plains aquifer in south-central Kansas, 1987
Author: Helgesen, J.O.; Stullken, L.E.; and Rutledge, A.T.
Publication: U.S. Geological Survey, Open-file Report, no. 91-0238, 62 pages
Year: 1992

Title: Regional study of the Dakota aquifer (Darton's Dakota revisited), pp. 69-73, In, Jorgensen, D.G.; and Signor, D.C., (eds.); Geohydrology of the Dakota aquifer
Author: Helgesen, J.O.; Jorgensen, D.G.; Leonard, R.B.; and Signor, D.C.
Publication: National Water Well Association, Worthington, OH, 247 pages
Year: 1984

Title: Geohydrology of the Great Plains aquifer system, central United States, (abstr.)
Author: Helgesen, J.O.; and Leonard, R.B.
Publication: American Water Resources Association, Annual Conference, p. 49
Year: 1988

Title: Geohydrology of the Great Plains aquifer system, central United States, pp. 179-190, In, Swain, L.A.; and Johnson. A.I., (eds.); Regional Aquifer Systems of the United States--Aquifers of the midwestern area
Author: Helgesen, J.O.; and Leonard, R.B.
Publication: American Water Resources Association, AWRA Monograph Series, no. 13, 238 pages
Year: 1989

Title: Geohydrology and hydrochemistry of the Dakota aquifer, central United States
Author: Leonard, R.B.; Signor, D.C.; Jorgensen, D.G.; and Helgesen, J.O.
Publication: Water Resources Bulletin, vol. 19, no. 6, pp. 903-911
Year: 1983

Title: Trace organic compounds in ground water in south-central Kansas as inferred from gas chromatography with flame-ionization detection, (abstr.)
Author: Helgesen, J.O.; and Thurman, E.M.
Publication: American Chemical Society, Abstracts of Papers, no. 196, p. ENVR4
Year: 1988

Title: Surface-water-quality assessment of the Lower Kansas River basin, Kansas and Nebraska; results of investigations, 1987-90
Author: Helgesen, J.O., (editor)
Publication: U.S. Geological Survey, Water Supply and Irrigation Paper, no. 2451, 129 pages
Year: 1996

Title: Geohydrology and hydrochemistry of the Dakota aquifer, central United States, pp. 229-237, In, Jorgensen, D.G.; and Signor, D.C., (eds.); Geohydrology of the Dakota Aquifer
Author: Leonard, R.B.; Signor, D.C.; Jorgensen, D.G.; and Helgesen, J.O.
Publication: National Water Well Association, Worthington, OH, 247 pages
Year: 1984

Title: Hydrology of the Great Plains Aquifer System in Nebraska, Colorado, Kansas, and adjacent areas
Author: Helgesen, J.O.; Leonard, R.B.; and Wolf, R.J.
Publication: U.S. Geological Survey, Professional Paper, no. 1414-E, 80 pages
Year: 1993

Title: Analysis of regional aquifers in the central midwest of the United States in Kansas, Nebraska, and parts of Arkansas, Colorado, Missouri, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming; summary
Author: Jorgensen, D.G.; Helgesen, J.O.; Signor, D.C.; Leonard, R.B.; Imes, J.L.; and Christenson, S.C.
Publication: U.S. Geological Survey, Professional Paper, no. 1414-A, 67 pages
Year: 1996

Title: Central Midwest Regional Aquifer-System Study, pp. 132-140, In, Sun, R.J., (ed.); Regional Aquifer-system Analysis Program of the U.S. Geological Survey; summary of projects, 1974-84
Author: Jorgensen, D.G.; Leonard, R.B.; Signor, D.C.; and Helgesen, J.O.
Publication: U.S. Geological Survey, Circular, no. 1002, 264 pages
Year: 1986

Title: Characterization of ground-water flow and chemical transport beneath two irrigated fields in south-central Kansas, 1988
Author: Rutledge, A.T.; and Helgesen, J.O.
Publication: U.S. Geological Survey, Water Resources Investigations, no. 90-4065, 37 pages
Year: 1990

Title: Hydrogeology and ground-water-quality conditions at the Harvey County landfill, south-central Kansas, 1990
Author: Helgesen, J.O.; Heck, B.A.; and Hargadine, D.A.
Publication: U.S. Geological Survey, Water Resources Investigations, no. 93-4036, 44 pages
Year: 1993

Title: Overview of nonpoint-source contamination of the High Plains aquifer in south-central Kansas, pp. 301-306, In, Mallard, G.E.; and Aronson, D.E., (eds.); U.S. Geological Survey Toxic Substances Hydrology Program; proceedings of the technical meeting
Author: Helgesen, J.O.; Stullken, L.E.; and Rutledge, A.T.
Publication: U.S. Geological Survey, Water Resources Investigations, no. 91-4034, 730 pages
Year: 1991

Title: Ground-and surface-water interaction between the Kansas River and associated alluvial aquifer, northeastern Kansas
Author: Wolf, R.J.; and Helgesen, J.O.
Publication: U.S. Geological Survey, Water Resources Investigations, no. 92-4137, 49 pages
Year: 1993

Title: A steady-state unsaturated-zone model to simulate pesticide transport
Author: Rutledge, A.T.; and Helgesen, J.O.
Publication: U.S. Geological Survey, Water Resources Investigations, no. 90-4164, 13 pages
Year: 1991

Title: Regional hydraulic conditions in the Great Plains aquifer system, central midwest United States, (abstr.)
Author: Helgesen, J.O.
Publication: Geological Society of America, Abstract with Programs, vol. 20, no. 2, p. 102
Year: 1988

Title: Regional study of the Dakota aquifer (Darton's Dakota revisited)
Author: Helgesen, J.O.; Jorgensen, D.G.; Leonard, R.B.; and Signor, D.C.
Publication: Ground Water, vol. 20, no. 4, pp. 410-414
Year: 1982

Title: Occurrence of pesticides in Kansas ground water, (abstr.)
Author: Helgesen, J.O.; and Perry, C.A.
Publication: Water and the Future of Kansas Conference, Proceedings with Abstracts, no. 7, p. 22
Year: 1990

Title: Relations between land use and water quality in the High Plains aquifer of south-central Kansas, pp. 437-443, In, Mallard, G.E.; and Ragone, S.E., (eds.); U.S. Geological Survey toxic substances hydrology program; proceedings of the technical meeting
Author: Helgesen, J.O.; and Rutledge, A.T.
Publication: U.S. Geological Survey, Water Resources Investigations, no. 88-4220, 651 pages
Year: 1989

Title: Water-quality conditions and trends; other water-quality characteristics, pp. 117-121, In, Helgesen, J.O., (ed.); Surface-water-quality assessment of the Lower Kansas River basin, Kansas and Nebraska; results of investigations, 1987-90
Author: Helgesen, J.O.; and Stamer, J.K.
Publication: U.S. Geological Survey, Open-file Report, no. 94-0365, 129 pages
Year: 1995

Title: Regional aquifers in Kansas, Nebraska, and parts of Arkansas, Colorado, Missouri, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming; geohydrologic framework
Author: Jorgensen, D.G.; Helgesen, J.O.; and Imes, J.L.
Publication: U.S. Geological Survey, Professional Paper, no. 1414-B, 72 pages
Year: 1993

Title: Equivalent freshwater head and dissolved-solids concentration of water in rocks of Cambrian, Ordovician, and Mississippian age in the northern Midcontinent, U.S.A.
Author: Jorgensen, D.G.; Helgesen, J.O.; Leonard, R.B.; and Signor, D.C.
Publication: U.S. Geological Survey, Miscellaneous Field Studies Map, no. MF-1835-B, 2 sheets, scale 1:1,000,000
Year: 1986

Title: Assessment of nonpoint-source contamination of the High Plains aquifer in south-central Kansas, 1987
Author: Helgesen, J.O.; Stullken, L.E.; and Rutledge, A.T.
Publication: U.S. Geological Survey, Water Supply and Irrigation Paper, no. 2381-C, 51 pages
Year: 1994

Title: Trace organic compounds in ground water in south-central Kansas as inferred from gas chromatography with flame-ionization detection
Author: Helgesen, J.O.; and Thurman, E.M.
Publication: American Chemical Society, Preprints of Papers, vol. 28, no. 2, pp. 9-12
Year: 1988

Title: Effects of agricultural and petroleum-production land use on water quality in the High Plains aquifer, south-central Kansas, (abstr.)
Author: Helgesen, J.O.
Publication: Ground Water, vol. 28, no. 5, p. 795
Year: 1990

Title: Effects of land use on ground-water quality, south-central Kansas, (abstr.)
Author: Helgesen, J.O.
Publication: Water and the Future of Kansas Conference, Proceedings with Abstracts, no. 8, p. 40
Year: 1991

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