| A steady-state unsaturated-zone model to simulate pesticide transport |
Rutledge, A.T.; and Helgesen, J.O. |
U.S. Geological Survey, Water Resources Investigations no. 90-4164, 13 pages |
1991 |
N/A
|
| 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 |
Jorgensen, D.G.; Helgesen, J.O.; Signor, D.C.; Leonard, R.B.; Imes, J.L.; and Christenson, S.C. |
U.S. Geological Survey, Professional Paper no. 1414-A, 67 pages |
1996 |
N/A
|
| Assessment of nonpoint-source contamination of the High Plains aquifer in south-central Kansas, 1987 |
Helgesen, J.O.; Stullken, L.E.; and Rutledge, A.T. |
U.S. Geological Survey, Water Supply and Irrigation Paper no. 2381-C, 51 pages |
1994 |
N/A
|
| Assessment of nonpoint-source contamination of the High Plains aquifer in south-central Kansas, 1987 |
Helgesen, J.O.; Stullken, L.E.; and Rutledge, A.T. |
U.S. Geological Survey, Open-file Report no. 91-0238, 62 pages |
1992 |
N/A
|
| 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 |
Jorgensen, D.G.; Leonard, R.B.; Signor, D.C.; and Helgesen, J.O. |
U.S. Geological Survey, Circular no. 1002, 264 pages |
1986 |
N/A
|
| Characterization of ground-water flow and chemical transport beneath two irrigated fields in south-central Kansas, 1988 |
Rutledge, A.T.; and Helgesen, J.O. |
U.S. Geological Survey, Water Resources Investigations no. 90-4065, 37 pages |
1990 |
N/A
|
| Description of data files compiled for the Central Midwest Regional Aquifer-System Analysis |
Helgesen, J.O.; and Hansen, C.V. |
U.S. Geological Survey, Open-file Report no. 89-0042, 37 pages |
1989 |
N/A
|
| Effects of agricultural and petroleum-production land use on water quality in the High Plains aquifer, south-central Kansas, (abstr.) |
Helgesen, J.O. |
Ground Water vol. 28, no. 5, p. 795 |
1990 |
N/A
|
| Effects of land use on ground-water quality, south-central Kansas, (abstr.) |
Helgesen, J.O. |
Water and the Future of Kansas Conference, Proceedings with Abstracts no. 8, p. 40 |
1991 |
N/A
|
| Equivalent freshwater head and dissolved-solids concentration of water in rocks of Cambrian, Ordovician, and Mississippian age in the northern Midcontinent, U.S.A. |
Jorgensen, D.G.; Helgesen, J.O.; Leonard, R.B.; and Signor, D.C. |
U.S. Geological Survey, Miscellaneous Field Studies Map no. MF-1835-B, 2 sheets, scale 1:1,000,000 |
1986 |
N/A
|
| Geohydrology and hydrochemistry of the Dakota aquifer, central United States |
Leonard, R.B.; Signor, D.C.; Jorgensen, D.G.; and Helgesen, J.O. |
Water Resources Bulletin vol. 19, no. 6, pp. 903-911 |
1983 |
N/A
|
| 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 |
Leonard, R.B.; Signor, D.C.; Jorgensen, D.G.; and Helgesen, J.O. |
National Water Well Association, Worthington, OH 247 pages |
1984 |
N/A
|
| 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 |
Signor, D.C.; Helgesen, J.O.; Jorgensen, D.G.; and Leonard, R.B. |
U.S. Geological Survey, Professional Paper no. 1414-C, 105 pages |
1997 |
N/A
|
| Geohydrology of the Great Plains aquifer system, central United States, (abstr.) |
Helgesen, J.O.; and Leonard, R.B. |
American Water Resources Association, Annual Conference p. 49 |
1988 |
N/A
|
| 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 |
Helgesen, J.O.; and Leonard, R.B. |
American Water Resources Association, AWRA Monograph Series no. 13, 238 pages |
1989 |
N/A
|
| Ground-and surface-water interaction between the Kansas River and associated alluvial aquifer, northeastern Kansas |
Wolf, R.J.; and Helgesen, J.O. |
U.S. Geological Survey, Water Resources Investigations no. 92-4137, 49 pages |
1993 |
N/A
|
| Hydrogeology and ground-water-quality conditions at the Harvey County landfill, south-central Kansas, 1990 |
Helgesen, J.O.; Heck, B.A.; and Hargadine, D.A. |
U.S. Geological Survey, Water Resources Investigations no. 93-4036, 44 pages |
1993 |
N/A
|
| Hydrology of the Great Plains Aquifer System in Nebraska, Colorado, Kansas, and adjacent areas |
Helgesen, J.O.; Leonard, R.B.; and Wolf, R.J. |
U.S. Geological Survey, Professional Paper no. 1414-E, 80 pages |
1993 |
N/A
|
| Occurrence of pesticides in Kansas ground water, (abstr.) |
Helgesen, J.O.; and Perry, C.A. |
Water and the Future of Kansas Conference, Proceedings with Abstracts no. 7, p. 22 |
1990 |
N/A
|
| 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 |
Helgesen, J.O.; Stullken, L.E.; and Rutledge, A.T. |
U.S. Geological Survey, Open-file Report no. 91-0088, 133 pages |
1991 |
N/A
|
| 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 |
Helgesen, J.O.; Stullken, L.E.; and Rutledge, A.T. |
U.S. Geological Survey, Water Resources Investigations no. 91-4034, 730 pages |
1991 |
N/A
|
| Regional aquifers in Kansas, Nebraska, and parts of Arkansas, Colorado, Missouri, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming; geohydrologic framework |
Jorgensen, D.G.; Helgesen, J.O.; and Imes, J.L. |
U.S. Geological Survey, Professional Paper no. 1414-B, 72 pages |
1993 |
N/A
|
| Regional hydraulic conditions in the Great Plains aquifer system, central midwest United States, (abstr.) |
Helgesen, J.O. |
Geological Society of America, Abstract with Programs vol. 20, no. 2, p. 102 |
1988 |
N/A
|
| Regional study of the Dakota aquifer (Darton's Dakota revisited) |
Helgesen, J.O.; Jorgensen, D.G.; Leonard, R.B.; and Signor, D.C. |
Ground Water vol. 20, no. 4, pp. 410-414 |
1982 |
N/A
|
| 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 |
Helgesen, J.O.; Jorgensen, D.G.; Leonard, R.B.; and Signor, D.C. |
National Water Well Association, Worthington, OH 247 pages |
1984 |
N/A
|
| 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 |
Helgesen, J.O.; and Rutledge, A.T. |
U.S. Geological Survey, Water Resources Investigations no. 88-4220, 651 pages |
1989 |
N/A
|
| Surface-water-quality assessment of the Lower Kansas River basin, Kansas and Nebraska; results of investigations, 1987-90 |
Helgesen, J.O., (editor) |
U.S. Geological Survey, Water Supply and Irrigation Paper no. 2451, 129 pages |
1996 |
N/A
|
| Surface-water-quality assessment of the Lower Kansas River basin, Kansas and Nebraska; results of investigations, 1987-90 |
Helgesen, J.O., (editor) |
U.S. Geological Survey, Open-file Report no. 94-0365, 129 pages |
1995 |
N/A
|
| Trace organic compounds in ground water in south-central Kansas as inferred from gas chromatography with flame-ionization detection |
Helgesen, J.O.; and Thurman, E.M. |
American Chemical Society, Preprints of Papers vol. 28, no. 2, pp. 9-12 |
1988 |
N/A
|
| Trace organic compounds in ground water in south-central Kansas as inferred from gas chromatography with flame-ionization detection, (abstr.) |
Helgesen, J.O.; and Thurman, E.M. |
American Chemical Society, Abstracts of Papers no. 196, p. ENVR4 |
1988 |
N/A
|
| 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 |
Rutledge, A.T.; and Helgesen, J.O. |
U.S. Geological Survey, Open-file Report no. 89-0409, 150 pages |
1989 |
N/A
|
| 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 |
Helgesen, J.O.; and Stamer, J.K. |
U.S. Geological Survey, Open-file Report no. 94-0365, 129 pages |
1995 |
N/A
|