AQUA TERRA Consultants
AQUA TERRA Services
Back to ATC Home

AQUA TERRA’s Six Year Modeling Effort for EPA Region 6 Culminates in Release of the Illinois River Watershed Modeling Program

Dated: 10/05/2015

On Oct. 1, 2015 U.S. Environmental Protection Agency (EPA) announced that it has made available the Illinois River Watershed Modeling Program which resulted from years of collaboration with local stakeholders, states and tribes in both Arkansas and Oklahoma. The Modeling Program will assist in the development of water pollution controls needed to meet water quality standards throughout the watershed and relies on the application of two highly specialized computer models, the Hydrological Simulation Program – FORTRAN (HSPF) and the Environmental Fluid Dynamics Code (EFDC).

For the past six years, AQUA TERRA has worked extensively with Region 6 and stakeholders to develop the HSPF Illinois River Watershed Model.

The Modeling Program will help identify potential pollution control measures designed to improve water quality in the watershed by reducing phosphorus from sources in both Okla. and Ark.

The Modeling Program is designed to reproduce conditions within the Illinois River watershed. In doing so, the model can be used to forecast different pollution control options and evaluate each option or combination of options ability to improve water quality in the watershed. EPA and its contractors have completed internal calibration and validation of both model’s operating systems, and an independent peer review of the Modeling Program has been completed as well.

EPA will now work with state and tribal partners to review the Modeling Program and underlying computer models. EPA will then hold a public meeting to review the Modeling Program and underlying computer models, discuss next steps, and receive comments from all stakeholders.

To learn more about Illinois River Watershed Modeling Program visit: http://www3.epa.gov/region6/water/npdes/illinoisriverwatershed/index.html