Total dissolved gas can be fatal for fish migrating through a hydropower tailrace and the river downstream. IIHR uses sophisticated computer simulations to develop strategies that will minimize TDG at hydropower dams and save fish.
AEP sought IIHR’s expertise to assess river hydraulics and complex flow patterns in the Ohio River near the Cardinal Power Plant. The project goal was to study the feasibility of installing submerged screens in the cooling water intake forebay to meet EPA requirements for fish impingement and entrainment.
IIHR constructed a large-scale physical model of the Hells Canyon Dam to test proposed fish-passage structures. This laboratory model complemented IIHR’s advanced CFD capabilities to simulate performance of fish passage facilities.
IIHR has extensive experience solving water issues, including the reduction of air in sewer systems. With Jacobs Engineering and the Metropolitan St. Louis Sewer District, IIHR constructed a physical model that includes a vortex dropshaft that, when constructed, will be one of the largest in the world at 20 feet in diameter.