Find out about the EAHCP

Ecological Model

The Ecological Model is comprised of four major submodels, which address river hydraulics, water quality, submerged aquatic vegetation, and the fountain darter population.  The model is used as a management tool to examine the effects of alternative flow regimes and submerged aquatic vegetation assemblages on fountain darter populations.  The conceptual overview is shown below.

The model was developed collaboratively by:

• Dr. William Grant (Texas A&M University)
• Dr. Todd Swannack (U.S. Army Engineer Research and Development Center)
• Dr. Hsiao-Hsuan (Rose) Wang (Texas A&M University)
• Dr. Thom Hardy (Watershed Systems Group)
• Dr. George Ward (University of Texas Austin)
• Dr. Robert Doyle (Baylor University)
• Dr. Timothy Bonner (Texas State University)
• Mr. Ed Oborny (BIO-WEST, Inc.)

Report Documents:

• Interim Report: Predictive Ecological Model for the Comal and San Marcos Ecosystems Project
• National Academy of Sciences Evaluation of the Predictive Ecological Model for the EAHCP: An Interim Report
• Abstract, Final Report: Fountain Darter Modeling System for the Comal and San Marcos Rivers
• Final Report: Fountain Darter Modeling System for the Comal and San Marcos Rivers