Interested in a career where you can make a difference?

Click here to view our open positions.

Trinity River Vision Operations Water Quality Model


Trinity River Vision Operations


Fort Worth, TX


Water Quality Modeling


Stream Modeling

Project Gallery

No items found.

To support permitting of a discharge of treated wastewater effluent from a new regional wastewater treatment plant, Plummer assisted the NTMWD in developing a QUAL-TX model and a plan for collecting field measurements of stream geometry and flowrates. The water quality objectives were coordinated with other aspects of the project, including flood control. Initial model development included extensive analysis of water quality data followed by calibration of the model to the existing Clear Fork Trinity River/West Fork Trinity River system.

Dam on Clear Fork Trinity River near Trinity Park
Dam on Clear Fork Trinity River near Trinity Park

A second phase of the project included adapting the model to the future system, which includes an adjustable water level control dam, a bypass channel, and isolation gates that control flows in and out of the inner channels. Plummer used the future system model to predict water quality impacts from operational strategies, such as allowing various storm flowrates into the inner channels, “tidal” operation of the water level control dam, recirculation of water through the inner channels, isolation gate operations, and removing Nutt Dam from the inner channels. 


Dissolved Oxygen Model of Oso Bay

Plummer developed a dissolved oxygen model that couples the FREHD hydrodynamic code (Hodges, 2012) and EPA WASP 7 to simulate dissolved oxygen in Oso Bay.

Coupling of SWAT and CE-QUAL-W2 Models

NTMWD sought to model nutrient loading from the Lavon Lake watershed and its impacts on water quality in Lavon Lake by coupling a SWAT model of the watershed with a CE-QUAL-W2 model of the lake.

Nutrient Study

As regulatory limits on nutrients and algae become an increasing reality in Texas, it is imperative that a reliable and site-specific approach be developed for establishing Texas Pollutant Discharge Elimination System (TPDES) permit effluent quality limits for nutrients.

Waste Load Allocation Model

Plummer updated the TCEQ’s regulatory model for the Upper Trinity River to a newer version and incorporated revised background flows.

Work With Us

We design solutions to the world's greatest challenges. We're ready to take on any problems you may run into.