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Water Models Archive
Surface Water - Superseded
PRZM, EXAMS, PRZM/EXAMS SHELL, GENEEC2
Ground Water - Superseded
More Useful Links - Superseded
- September 9, 2010
Development and Use of Percent Cropped Area Adjustment Factors in Drinking Water Exposure Assessments | PDF Version (24 pp, 646 KB, About PDF) - March 16, 2012
Development and Use of Percent Cropped Area and Percent Turf Area Adjustment Factors in Drinking Water Exposure Assessments: 2012 Update
PRZM (Pesticide Root Zone Model) - Superseded
PRZM is a surface water model that simulates chemical movement in soil within and immediately below the plant root zone. PRZM is often linked with EXAMS to develop refined exposure assessments of pesticide concentrations in aquatic environments.
EXAMS (Exposure Analysis Modeling System) - Superseded
EXAMS is a surface water model that evaluates the fate, transport, and exposure concentration of pesticides. EXAMS is frequently linked with PRZM to develop refined exposure assessments of pesticide concentrations in aquatic environments.
- Executable
- Source Code
- Documentation
- EXAMS Environments examsenv.zip (1kb)
PRZM/EXAMS SHELL - Superseded
PE Version 4.01 - Superseded
Approved Model Suite
- PE Version 4.01
(August 13, 2003) - PRZM v3.12beta
(May 24, 2001) - EXAMS v2.98.04
(July 18, 2002)
Executable
- Script pe4v01.pl (91 kb)
- Crop Scenarios
- Meteorological Files
Documentation
PE Version 5.0 - Superseded
Approved Model Suite
- PE Version 5.0
(November 15, 2006) - PRZM v3.12.2
(May 12, 2005) - EXAMS v2.98.04.06
(April 25, 2005)
Executable
- Script pe5.pl (109 kb)
- Crop Scenarios Version 3 (WinZip self-extracting .exe file)
- Meteorological Files
Documentation
- PE 5.0 User's Manual | Microsoft® Office Word Version (8 pp, 88 KB)
- Standard Crop Scenario Metadata
- Nonstandard Crop Scenario Metadata
- Barton Springs Salamander
- Red Legged Frog
- organophosphate | WordPerfect® Version (91 pp, 506 KB)
- n-methyl carbamate | WordPerfect® Version (70 pp, 381 KB)
GENEEC2 (GENeric Estimated Environmental Concentration) - Superseded
GENEEC is a surface water model that is used to assess exposure of pesticides to aquatic organisms and the environment.
- Executable geneec2.exe (80 kb)
- Source Code (Fortran 77) geneec2.for (60 kb)
- Description
- Users Manual
GENEEC2 for Windows 7© - Superseded
The GENeric Estimated Environmental Concentration (GENEEC 2.1) is a screening model to predict environmental concentrations of pesticides in surface water that was recompiled to operate in the Microsoft© Windows 7© environment. This is a legacy model of the Agency which there is no active support. It is posted here as a courtesy for end users who operate in the Windows 7© environment until December 31, 2016 at which time it will be removed from this website. For reference, the Surface Water Concentration Calculator (SWCC) is the official model currently utilized for estimating environmental concentrations of pesticides in surface water (https://www.epa.gov/oppefed1/models/water/#swcc).
- Windows© 7© Compilation Executable Geneec2.exe (1MB)
PRZM-GW - Superseded
- Executable originalPRZMGW.msi (1.4MB)
- Scenarios and Metadata