I. M. Verstraeten

• Hydrogeology and subsurface nitrate in the Upper Big Blue Natural Resources District, central Nebraska, July 1995 through September 1997
• Interaction of surface water and ground water in the Dutch Flats area, western Nebraska, 1995-99
• Is septic waste affecting drinking water from shallow domestic wells along the Platte River in eastern Nebraska?
• Minimizing the risk of herbicide transport into public water supplies
• Reconnaissance of ground-water quality in the North Platte Natural Resources District, western Nebraska, June-July 1991
• Reconnaissance of ground-water quality in the Papio-Missouri River Natural Resources District, eastern Nebraska, July through September 1992
• Selected field and analytical methods and analytical results in the Dutch Flats area, western Nebraska, 1995-99
• Selected surface-water, ground-water, and tracer data from the Elkhorn and Platte rivers and the alluvium near Ashland, eastern Nebraska, 1991-97
• Use of environmental tracers and isotopes to evaluate sources of water, nitrate, and uranium in an irrigated alluvial valley, Nebraska
• Use of environmental tracers and isotopes to evaluate sources of water, nitrate, and uranium in an irrigated alluvial valley, Nebraska