As a courtesy to one of our trusted and valued colleagues, Aquatic Habitat Analysts, Inc., we have provided a link to their aquatic habitat modeling software SEFA: System for Environmental Flow Analysis website:

RHABSIM 3.0 is a fully integrated legacy program for river hydraulics and aquatic habitat modeling. The software can be obtained at no charge by contacting our retired colleague, Tom Payne (who is now part of Aquatic Habitat Analysts, Inc.), via the email portal: