TMDL Models and Tools
The EPA Center for Exposure Assessment Modeling (CEAM) distributes simulation models and database software designed to quantify movement and concentration of contaminants in lakes, streams, estuaries, and marine environments.
Available Products
The following surface water models were developed by the U.S. Environmental Protection Agency in conjunction with other government, academic, and commercial institutions. To find out more about a particular model, click on a hyper-linked model name in the table below. The models listed are available for download and are subject to the CEAM distribution and support policy.
| Product Name | Operating System | Key Words | Maintained By |
|---|---|---|---|
| Evapotranspiration Calculator | Java enabled browser | evapotranspiration, et tool, hamon, morton-crae, penman-montieth daily, penman-montieth hourly, priestly taylor, shuttleworth-wallace, class-a pan penpan, open surface penman, granger-gray, morton-crwe, mcjannett-penman-montieth, time series, TMDL | CEAM |
| Evapotranspiration Desktop Version | Windows XP, Vista, Windows 7, or Windows 8 | evapotranspiration, et tool, hamon, morton-crae, penman-montieth daily, penman-montieth hourly, priestly taylor, shuttleworth-wallace, class-a pan penpan, open surface penman, granger-gray, morton-crwe, mcjannett-penman-montieth, time series, TMDL | CEAM |
| GRAY Tool | Java enabled browser | HSPF, WinHSPF, FTABLE, RCHRES, BMP, assessment, compliance, discharge, environmental effects, hydrology, permits, rivers, sediment, streams, surface water, TMDL related, toxicity | CEAM |
| GREEN Tool | Java enabled browser | HSPF, WinHSPF, FTABLE, RCHRES, BMP, assessment, compliance, discharge, environmental effects, hydrology, permits, rivers, sediment, streams, surface water, TMDL related, toxicity | CEAM |
| Desktop HDFT | Win 9x, NT, XP | HSPF, WinHSPF, FTABLE, RCHRES, BMP, assessment, compliance, discharge, environmental effects, hydrology, permits, rivers, sediment, streams, surface water, TMDL related, toxicity | CEAM |
| HDFT Web Version | Java enabled browser | HSPF, WinHSPF, FTABLE, RCHRES, BMP, assessment, compliance, discharge, environmental effects, hydrology, permits, rivers, sediment, streams, surface water, TMDL related, toxicity | CEAM |
| HSPF | Windows XP, Vista, Windows 7, or Windows 8 | assessment, biology, compliance, deposition, discharge, environmental effects, estuaries, hydrology, lakes, metals, monitoring, NPS related, NPDES, nutrients, permits, pesticides, point source(s), rivers, sediment, streams, surface water, test/analysis, TMDL related, toxicity | CEAM |
| Model Performance Tool | Java enabled browser | Model Performance Evaluation and Scenario Analysis, MPESA, model performance, models predict time series data, streamflow, Hydrological Simulation Program-Fortran, HSPF, Stormwater Management Model, SWMM, evaluation, diagnostics, time series separation and reconstruction, TSSR, descriptive statistics, error analysis, weighted ranks, serial and cross-correlation analysis, Nash-Sutcliffe model efficiency | CEAM |