- Bachman, L. J., Krantz, D. E., and Böhlke,
J. K., 2002, Hydrogeologic framework, ground-water
geochemistry, and assessment of nitrogen yield from base flow in two
agricultural watersheds, Kent County, Maryland: U.S. Environmental
Protection Agency, EPA/600/R-02/008, 93 p.
- Böhlke, J. K., 2002, Groundwater
recharge and agricultural contamination- Erratum: Hydrogeology
Journal, v. 10, p. 438-439.
- Böhlke, J. K., 2003, Sources,
transport, and reaction of nitrate in ground water, in Lindsey, B. D.,
and others, eds., Residence times and nitrate transport in ground water
discharging to streams in the Chesapeake Bay Watershed: U.S.
Geological Survey Water Resources Investigations Report 03-4035, p.
25-39.
- Böhlke, J. K., Harvey, J. W., and Voytek,
M. A., 2004, Reach-scale isotope tracer experiment
to quantify denitrification and related processes in a nitrate-rich
stream in an agricultural watershed, mid-continent USA: Limnology
and Oceanography, v. 49, p. 821-838.
- Böhlke, J.K., Wanty, R., Tuttle, M., Delin,
G., and Landon, M., 2002, Denitrification in
the recharge area and discharge area of a transient agricultural nitrate
plume in a glacial outwash sand aquifer, Minnesota: Water Resources
Research, v. 38(7), 10.1029/2001WR000663, 200238, p. 10.1-10.26.
- Böhlke, J.K., 2002, Groundwater
recharge and agricultural contamination: Hydrogeology Journal,
v. 10, p. 153-179.
- Böhlke, J.K., and Denver, J.M., 1995,
Combined use of ground-water dating, chemical
and isotopic analyses to resolve the history and fate of ground-water
nitrate contamination in two agricultural watersheds, Atlantic coastal
plain, Maryland: Water Resources Research, v. 31, p. 2319-2339.
- Böhlke, J.K., and Horan, M., 2000, Strontium
isotope geochemistry of ground waters and streams affected by agriculture,
Locust Grove, Maryland: Applied Geochemistry, v. 15, p. 599-609.
(on-line
abstract)
- Delin, G.N., Healy, R.W., Landon, M.K., and
Böhlke, J.K., 2000, Effects of topography
and soil properties on recharge and movement of water through the unsaturated
zone at two sites in an agricultural field: Journal of the American
Water Resources Association, v. 36, part 6, p. 1401-1416. (on-line
abstract)
- Delin, G.N., Landon, M.K., Nelson, K.J., Wanty,
R.B., Healy, R.W., Olsen, H.W., Böhlke, J.K., Schroyer, B.R., and
Capel, P.D., 1997, Hydrogeologic and water-quality
data used to evaluate the effects of focused recharge on ground-water
quality near Princeton, Minnesota, 1991-1995: U.S. Geological
Survey Open-File Report 97-21, 47 p.
- Groffman, P.M., Altabet, M.A., Böhlke, J.K., Butterbach-Bahl,
K., David, M.B., Giblin, A.E., Kana, T.M., Nielsen, L.P., Firestone,
M.K., and Voytek, M.A., in press, Methods for
measuring denitrification: Diverse approaches to a difficult problem:
Ecological Applications.
- Katz, B.G. and Böhlke, J.K., 2000, Monthly
variability and possible sources of nitrate in ground water beneath
mixed agricultural land use, Suwannee and Lafayette Counties, Florida:
U.S. Geological Survey Water-Resources Investigations Report 00-4219,
28 p. (on-line abstract and to download pdf file)
- Katz, B.G., Hornsby, H.D., and Böhlke,
J.K., 1999, Sources of nitrate in water from
springs and the Upper Floridan aquifer, Suwannee River basin, Florida:
Heathwaite, L., ed., Impacts of Land-Use Change on Nutrient Loads from
Diffuse Sources, International Association of Hydrologic Sciences, Publication
257, p. 117-124.
- Katz, B.G., Hornsby, H.D., Böhlke, J.K.,
and Mokray, M.F., 1999, Sources and chronology
of nitrate contamination in spring waters, Suwanee River basin, Florida:
U.S. Geological Survey Water Resources Investigations Report 99-4252,
54 p. (on-line
abstract or to obtain pdf file)
- Katz, B.G., Böhlke, J.K., and Hornsby,
H.D., 2001, Timescales for nitrate contamination
of spring waters, northern Florida, USA: Chemical Geology, v.
179, p. 167-186. (on-line
abstract)
- Lindsey, B. D., Phillips, S. W., Donnelly, C.
A., Speiran, G. K., Plummer, L. N., Böhlke, J. K., Focazio, M.
J., Burton, W. C., and Busenberg, E., 2003, Residence
times and nitrate transport in ground water discharging to streams in
the Chesapeake Bay Watershed, U.S. Geological Survey Water-Resources
Investigations Report 03-4035, p. 201.
- McMahon, P.B., and Böhlke, J.K., in press, Regional
patterns in the isotopic composition of natural and anthropogenic nitrate
in groundwater, High Plains, USA: Environmental Science and
Technology.
- McMahon, P.B., and Böhlke, J.K., 1996,
Denitrification and mixing in a stream/aquifer
system: effect on nitrate loading to surface water: Journal of
Hydrology, v. 186, p. 105-128. (on-line
abstract)
- McMahon, P.B., Böhlke, J.K., and Bruce,
B.W., 1999, Denitrification in marine shales
in northeastern Colorado, USA: Water Resources Research, v. 35,
p. 1629-1642. (on-line
abstract)
- McMahon, P.B., Böhlke, J.K., and Litke,
D.W., 1995, Fate of nitrate in the South Platte
River alluvial aquifer system, Colorado: U.S. Geological Survey
Yearbook, Fiscal Year 1994, p. 45-47.
- McMahon, P.B., Dennehy, K.F., Bruce, B.W., Böhlke, J.K, Michel,
R.L., Gurdak, J.J., and Hurlbut, D.B., 2006, Storage
and transit time of chemicals in thick unsaturated zones under rangeland
and irrigated cropland, High Plains, USA: Water Resources Research,
v. 42 (W03413, doi:10.1029/2005WR004417), p. 1-18.
- Oren, O., Yechieli, Y., Böhlke, J. K., and Dody, A., 2004, Contamination
of groundwater under cultivated fields in an arid environment, central
Arava Valley, Israel: Journal of Hydrology, v. 290, p. 312-328.
- Seitzinger, S.P., Harrison, J., Böhlke, J. K., Bouwman, A.F.,
Lowrance, R.R., Peterson, B.J., Tobias, C.R., and van Drecht, G., in
press, Denitrification across landscapes and
waterscapes: a synthesis: Ecological Applications.
- Smith, L.K., Voytek, M.A., Böhlke, J.K., and Harvey, J.W., in
press, Denitrification rates in nitrate-contaminated
streams: application of membrane inlet mass spectrometry and isotope
tracer methods in flow-through chambers with intact cores: Ecological
Applications.
- Verstraeten, I.M., Böhlke, J.K., and Kraemer,
T.F., 2000, Groundwater/ surface-water interactions
and sources of nitrogen, radon, and uranium in a irrigated alluvial
aquifer, Nebraska, USA: Tracers and Modeling in Hydrogeology,
International Association of Hydrologic Sciences Publication 262, p.
525-531. (on-line
abstract)
- Wanty, R.B., Tuttle, M.L., Landon, M.K., Delin,
G.N., and Böhlke, J.K., 1996, Geochemistry
of nitrogen in a farmed watershed near Princeton, central Minnesota,
in Morganwalp, D.W., and Aronson, D.A., eds., U.S. Geological Survey
Toxic Substances Hydrology Program - Proceedings of the Technical Meeting,
Colorado Springs, Colorado, September 20-24, 1993: U.S. Geological Survey
Water- Resources Investigations Report 94-4014, p. 591-596. (on-line
abstract)
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