Record Display for the EPA National Library Catalog


Main Title Use of Soil Parameters for Describing Pesticide Movement Through Soils.
Author Davidson, J. M. ; Brusewitz, G. H. ; Baker, D. R. ; Wood., A. L. ;
CORP Author Oklahoma State Univ., Stillwater.;Environmental Protection Agency, Athens, Ga. Southeast Environmental Research Lab.
Year Published 1974
Report Number EPA-R-800364; EPA-ROAP-21AYP-13; EPA-660/2-75-009;
Stock Number PB-242 859
Additional Subjects Soil water ; Water flow ; Pesticides ; Soil properties ; Adsorption ; Surface water runoff ; Desorption ; Soil profiles ; Dispersing ; Diffusion ; Fluid infiltration ; Flow rate ; Difference equations ; Mathematical models ; Pore pressure ; Hydraulic conductivity ; Computer programs ; Test methods ; Path of pollutants ; Soil water movement
Library Call Number Additional Info Location Last
NTIS  PB-242 859 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 164p
Solutions of a differential equation for solute transport are described for both transient and steady state soil water conditions. The solutions use independently measured soil and soil-pesticide adsorption-desorption characteristics to describe the movement of a pesticide in a soil profile. Owing to the complexity of the soil-pesticide adsorption-desorption characteristics, numerical solutions of the soil water flow and solute transport equations were used. Numerical dispersion in the finite difference solution of the solute transport equation was considered and a correction included in the solution. Experimental results from laboratory and field studies were used to test the numerical solutions for their ability to describe the movement and distribution of pesticides in a soil profile with time.