U.S. Geological Survey Toxic Substances Hydrology Program--Proceedings
of the Technical Meeting, Colorado Springs, Colorado, September 20-24, 1993,
Water-Resources Investigations Report 94-4015
  
Predicting Nitrate-Nitrogen and Atrazine Contamination in the
High Plains Aquifer in Nebraska
by
A.D. Druliner (U.S. Geological Survey, Lincoln, Nebr.) and T.S.
McGrath (U.S. Geological Survey, Lincoln, Nebr.)
Abstract
Three statistical models, developed through the Toxic-Waste--Ground-Water
Contamination Program of the U.S. Geological Survey, were used to predict
the concentrations of nitrate-nitrogen and atrazine and the probability
of atrazine detections in ground water in Buffalo and Hall Counties, south-central
Nebraska. The models use a combination of hydrochemical, hydrologic, soils,
and land-use explanatory variables, and ARC/INFO techniques to generate
maps showing predicted concentrations of the selected contaminants. Confirmational
testing of the models and comparison of maps of predicted concentrations
to maps of observed concentrations showed that the statistical models were
reasonable predictors of nitrate-nitrogen and atrazine concentrations in
ground water of the High Plains aquifer in south-central Nebraska.
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