Dissolved Oxygen Model of Lewisville Lake


Upper Trinity Regional Water District (UTRWD)


Denton County, TX


Water Quality Modeling


Reservoir Modeling

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Using the EPA’s Water Quality Assessment Simulation Program (WASP), Plummer developed an advanced water quality model of Lewisville Lake to support a TPDES permit renewal for the Lakeview Regional Water Reclamation Plant. The depth-averaged, 2-D model contained 10-acre computational cells and accounted for mixing and dispersion of the treated effluent discharge to the lake. Plummer used the model to identify discharge flowrates and effluent water quality limits that are projected to maintain the dissolved oxygen standard in Lewisville Lake. We wrote a modeling technical memorandum that was submitted as part of the TPDES permit application, answered TCEQ questions about the model, and assisted UTRWD in obtaining the discharge permit.


Grapevine Lake Nutrient Modeling

Using the Water Quality Analysis Simulation Program (WASP), Plummer developed and calibrated a water quality model of Grapevine Lake.

Trinity River Vision Operations Water Quality Model

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.

Lavon Lake Water Quality Modeling – TPDES Permitting Support

Plummer developed a CE-QUAL-W2 model of Lavon Lake to evaluate impacts on dissolved oxygen, nutrients and chlorophyll-a levels in the lake.

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.

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