Trinity River Vision Operations Water Quality Model


Trinity River Vision Operations


Fort Worth, TX


Water Quality Modeling


Stream Modeling

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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. 


Stream Water Quality Modeling – TPDES Permitting Support

To support permitting of a discharge of treated wastewater effluent from a new wastewater treatment plant, Plummer developed a QUAL-TX model from HEC-RAS cross-sections of the receiving stream.

Drought Response Feasibility and Engineering Study

The 2014 Austin Water Resource Task Force recommended that the City of Austin evaluate the feasibility of IPR in Lady Bird Lake (LBL) as one of several water supply strategies for consideration in the City’s integrated water resources plan.

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.

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