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The Hydrologic Engineering Center's (HEC) River Analysis System (HEC-RAS) software allows you to perform one-dimensional steady and 1D and 2D unsteady flow river hydraulics calculations. HEC-RAS is an integrated system of software, designed for interactive use in a multi-tasking, multi-user network environment.

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The Ecosystem Functions Model - Simulation (HEC-EFMSim) software allows users to create and characterize ecological communities that are simulated in a data-defined virtual environment where they interact with that environment, themselves, and each other. Simulation results can be viewed as animations of variables such as count, size, and density for virtual communities.

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The Ecosystem Functions Model (HEC-EFM) is used to determine ecosystem responses to changes in the flow regime of a river or wetland. HEC-EFM involves: 1) statistical analyses, 2) hydraulic modeling, and 3) use of Geographic Information Systems. Through this process, study teams visualize and define existing ecologic conditions, identify restoration sites, and assess alternatives.

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HEC-EFM Plotter is designed to help users view, navigate, and interpret output generated by the Ecosystem Functions Model (HEC-EFM). By displaying each computational step that HEC-EFM performs while analyzing time series, HEC-EFM Plotter offers an opportunity to understand the statistical processes and results of HEC-EFM applications.

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GeoEFM performs spatial analyses to help inform ecosystem restoration and water management activities, especially: 1) computation and comparisons of habitat areas and 2) assessment of habitat functionality via consideration of habitat quality, connectivity, and distribution.