EXPRESS

EXAMS - PRZM Exposure Simulation Shell (EXAMS = Exposure Analysis Modeling System) (PRZM = Pesticide Root Zone Model)

EXPRESS, or the EXAMS - PRZM Exposure Simulation Shell, is a combination of the EXAMS and PRZM models developed to assess the exposure of aquatic pesticides on crops. The EXPRESS model contains two tiers: (1) a high-level identification of harmful pesticides and (2) a risk assessment model based on watershed fate and transport processes.

Developer
EPA
Model Information
For more information about this model, go to www.epa.gov
Spatial Resolution
The spatial resolution is defined regionally. For each region crop types are selected and local parameters defined (e.g., meteorological and environmental).
Temporal Resolution
Model output time step is daily.
Outputs
Outputs specifics include water quality characteristics.
Intended User
practitioner
Model Type
ecosystem
Inclusion of Climate Change
Climate conditions are not easily included. Model uses preloaded historical meteorological data from 1961 - 1990.
Geographic Region
generalized
Data Requirements
data provided by the user
Source Code Availability
open source
Dimensions
2d
Computational Burden
medium
Scenario Modeling
batch mode likely
Coding Language
FORTRAN, GUI
Operating System
not applicable
Mathematical Approach
optimization, simulation
Maintenance Plan
not supported
Date of Last Known Update
1-Jul-07
User Manual
go to documentation at www.epa.gov