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

摘要

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.