ABSTRACT:
The California Department of Food and Agriculture is evaluating existing and potential sources of data for incorporation into its Groundwater Protection Plan. That plan is being developed to aid those involved in pesticide regulation programs in weighing the environmental costs and benefits involved in specific site applications of agrochemicals. In the present study three Fresno County data sets were subjected to discriminant analyses. These data included the California well inventory of well water samples analyzed for pesticide residues and a soil map unit inventory extracted from the soil survey for eastern Fretsno. The third data set, the U.S. rectangular coordinate survey system, provided common geographic units for the other two. Statistical functions were derived that classify the geographic units by occurrence of DBCP -contaminated wells within their boundaries. Functions were developed for the six taxa found most reliable in predicting the contamination status of the geographic units in Merced County, which comprised an independent data set used for model verification.
Footnotes
H. R. Teso, M. R. Peterson, D. L. Sheeks III, and R. E. Gallavan are environmental hazard scientists with the Environmental Hazards Assessment Program, California Department of Food and Agriculture, University of California, Riverside, 92521. T. Younglove is a statistician with the Statewide Air Pollution Research Center, University of California, Riverside. The authors acknowledge the efforts of Holly Haggerty and Glenn DeHart, who were instrumental in gathering and organizing the information in the soils inventory.
- Copyright 1988 by the Soil and Water Conservation Society
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