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RECORD NUMBER: 1144 OF 1177

OLS Field Name OLS Field Data
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
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB-242 859 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 164p
Abstract 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.
Highlights Notes Presents mathematical models to measure soil-pesticide adsorption-desorption characteristics and presents results from laboratory and field tests.
NTIS Title Notes Final rept. 1 May 72-31 Aug 74.
PUB Date Free Form 31 Aug 74
Category Codes 08M; 13B; 06F; 48E#; 68E#; 68D
NTIS Prices PC A08/MF A01
Document Type NT
Cataloging Source NTIS/MT
Control Number 326606418
Origin NTIS
Type CAT