PRZM-2, a model for predicting pesticide fate in the crop root and unsaturated soil zones: User's manual for release 2. 0

摘要: PRZM-2 links two subordinate models--PRZM and VADOFT--in order to predict pesticide transport transformation down through the crop root unsaturated zones. PRZM is a one-dimensional, finite difference model that accounts for fate in zone. This release of incorporates several features addition those simulated original code--specifically, soil temperature simulation, volatilization vapor phase soils, irrigation microbial transformation, method characteristics algorithm eliminate numerical dispersion. now capable simulating parent compound as many daughter species. VADOFT element code solves Richard's equation flow The user may make use constitutive relationships between pressure, water content, hydraulic conductivity solve equations. also simulate products. codes are linked together with aid flexible execution supervisor allows build loading models tailored site-specific situations. In perform probability-based exposure assessments, equipped Monte Carlo pre- post-processor.