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Grapevine Lake Nutrient Modeling


Trinity River Authority of Texas


Denton County, TX


Water Quality Modeling


Reservoir Modeling

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Grapevine Lake
Grapevine Lake

Using the Water Quality Analysis Simulation Program (WASP), Plummer developed and calibrated a water quality model of Grapevine Lake. As a first step in developing the model, we acquired and managed historical water quality data from several sources, including rainfall, evaporation, reservoir water surface elevation, and nutrient, BOD, dissolved oxygen, and chlorophyll-a concentrations. Then, we analyzed lake bathymetry, created model segments, and constructed the WASP model. During model calibration, we identified relationships between the water quality data and biological and chemical processes operating in the lake. Finally, we used the model to assess eutrophication trends, investigate the potential impacts of wastewater discharges and urban development, and develop recommendations for future management strategies.


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.

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.

Dissolved Oxygen Model of Lewisville Lake

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.

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.

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