2-D Simulation of Non-Isothermal Fate and Transport of a Drip-Applied Fumigant in Plastic-Mulched Soil Beds. II. Sensitivity Analysis and Model Application |
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| Authors: | Wonsook Ha Craig D. Stanley Robert S. Mansell Husein A. Ajwa |
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| Affiliation: | (1) USDA-ARS, US Salinity Laboratory, Riverside, CA 92507, USA;(2) University of Florida-Gulf Coast Research and Education Center, Wimauma, FL 33598, USA;(3) Department of Soil and Water Science, University of Florida, Gainesville, FL 32611, USA;(4) Department of Plant Sciences, University of California-Davis, Salinas, CA 93905, USA |
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| Abstract: | Temperature dependence of selected parameters was defined and illustrated. The order of sensitivity among tested model parameters (sorption coefficient, K D; diffusion coefficient, D g; vapor pressure, P; degradation rate, k; Henry’s constant, H) was k > P > K D > H > D g for 1-day simulations and k > P and K D > D g > H for 2-day simulations. The most sensitive parameter for both days was k. Mass balance errors were calculated using NRMSE (normalized root mean square error) to evaluate the level of agreement. The numerical model was applied to predict fumigant movement in the soil bed. |
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| Keywords: | Sensitivity analysis Numerical model Non-isothermal pesticide transport Temperature dependence Methyl isothiocyanate (MITC) |
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