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Modeling Projects

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Adaptation of AVGWLF watershed model for use in Texas: Phase I

Project Goals/Objectives: The purpose of this project is to test and modify the AVGWLF watershed model for use in selected areas of Texas and surrounding states: Phase 1

Project Location: Outcomes of this project will impact many stream segments and watersheds in Texas and surrounding states.

Projects Participants: Penn State Institutes of Energy and the Environment

Project Costs: Federal ($122,623); Non-Federal Match ($0); Total Project ($122,623)

Arroyo Colorado Agricultural Nonpoint Source Assessment

Project Goals/Objectives: The primary focus of this project is to better characterize agricultural runoff in the Arroyo Colorado, assess and demonstrate the effects of BMP implementation at the field and sub-watershed level, and measure progress towards meeting WPP goals. A secondary focus is to evaluate the natural phosphorus reduction capabilities of drainage ditches on runoff from irrigated cropland in the Arroyo Colorado watershed.

Assessment of Water Quality and Watershed Planning for the Leona River

Project Goals/Objectives:  Provide stakeholders and agencies with sufficient information to address bacteria impairments on the Leona River through verification of use attainment, revision of water quality standards, or development of a WPP or TMDL.   

Project Location:  Leona River (Segment ID 2109) (Leona River Watershed includes Frio, Uvalde, and Zavala Counties)

Project Costs: $861,714

Project Websites: http://leonariver.org/

Best Management Practice (BMP) Verification in the Richland-Chambers Watershed

Project Goals/Objectives: The goals of the project are to verify the effectiveness of nutrient Best Management Practices (BMPs) installed on a portion (Mill Creek) of the Richland-Chambers reservoir watershed to provide supporting information for BMP implementation within the entire Richland-Chambers reservoir watershed.

Project Location: Richland Creek, Segment 0837; Chambers Creek, Segment 0814; and Richland-Chambers reservoir, Segment 0836

Continuous Water Quality Monitoring and Dissolved Oxygen Modeling in the Pecos River

Project Goals/Objectives: There are two main objectives to the project with the first objective is to facilitate the construction, installation, monitoring and maintenance of a CWQM station on the Pecos River near Girvin, TX. The station will be incorporated into TCEQ’s CWQM network and will provide critical data for evaluating management practice implementation activities associated with the Pecos River WPP.

Development and Testing of a Texas BMP Evaluation Tool to Aid Decision-Making in Conservation Planning on Agricultural Lands

Project Goals/Objectives: To develop an easy-to-use Texas BMP Evaluation Tool to aid in science-based BMP selection, cost-effective conservation spending, and program benefit analysis. Specifically this tool will be designed to assist land managers and agency planners in conservation practice decision-making related to on-farm (field-scale) alternatives and effectiveness and facilitate evaluation and reporting of agricultural nonpoint source load reductions from WQMP implementation.

Development of a Watershed Protection Plan for Attoyac Bayou

This project shall serve as a means for establishing and engaging a watershed stakeholder group to assist in the development and future implementation of a Watershed Protection Plan (WPP) for the Attoyac Bayou watershed. This project will utilize portions of the “Three-Tier Approach for Bacteria TMDL Development” as recommended in the Bacteria TMDL Task Force Report submitted to TCEQ and TSSWCB.

Development of a Watershed Protection Plan for Cedar Bayou

Project Goals/Objectives: To develop a nine element Watershed Protection Plan (WPP) for the Cedar Bayou watershed by: 1) targeted water quality sampling and analysis, 2) conducting a watershed source survey and developing a comprehensive GIS inventory, 3) analyze water quality data using Load Duration Curves and spatially explicit modeling, 4) establish and provide direction for a stakeholder group that will serve as a decision making body.

Development of a Watershed Protection Plan for Double Bayou

Project Goals/Objectives: To develop a nine element Watershed Protection Plan (WPP) for the Double Bayou watershed by 1) establishing and providing direction for a stakeholder group that will serve as a decision-making body, 2) conducting targeted water quality sampling and analysis, 3) identifying and analyzing spatial and temporal patterns in watershed data; and 4) increasing education among targeted audience.

Project Location: Double Bayou watershed in Chambers and Liberty Counties.

Development of a Watershed Protection Plan for the Concho River Basin

Project Goals/Objectives: This project provided an assessment of existing and potential water quality threats related to on-going nonpoint source (NPS) water pollution within the Concho River basin and will also provide a Watershed Protection Plan (WPP). Information obtained from this project was made available to state, federal, and local decision makers to promote the orderly restoration of the basin aquatic environment and to prevent additional degradation.

Development of the Lower Nueces River Watershed Protection Plan

Project Goals/Objectives:  Develope a Watershed Protection Plan (WPP) for the Lower Nueces River Watershed (segment 2101) through establishing and providing direction for a stakeholder group that will serve as  decision-making body, identifying analyzing spatial and temporal patterns in watershed data; and increasing education among targeted audience.

Development of the Plum Creek Watershed Protection Plan

Project Goals/Objectives: The purpose of this project is to provide an assessment of existing and potential water quality threats in the Plum Creek Watershed, to coordinate the development of a Watershed Protection Plan (WPP), and to facilitate beginning phases of implementation.

Identify and Characterize NPS Bacteria Pollution to Support Implementation of Bacteria TMDLs in the Oso Bay Watershed

Project Goals/Objectives: To provide information on nonpoint sources of Enterococci in the upstream portions of Oso Creek to support development of the TMDL and targeting of implementation activities.

Lampasas River Watershed Assessment and Protection Project

The Lampasas River (Segment 1217 in the Brazos River Basin), rises in western Hamilton County 16 miles west of Hamilton and flows southeast for 75 miles, passing through Lampasas, Burnet, and Bell counties. In Bell County, the river turns northeast and is dammed five miles southwest of Belton to form Stillhouse Hollow Lake (Segment 1216). Below Stillhouse Hollow Lake, the Lampasas River flows to its confluence with Salado Creek and the Leon River to form the Little River.

Mathematical Model for the Dispersal of the Leaf Beetle for Biological Control of Invasive Saltcedar

Project Goals/Objectives: The goal of this project is to aid in implementing the Implementation Plan for Sulfate and Total Dissolved Solids (TMDLs) in the J.B. Thomas, E.V. Spence and O.H. Ivey Reservoirs by biological control of saltcedar in riparian areas along the Colorado River of Texas and its tributaries in an effort to reduce nonpoint source pollution loadings resulting from invasive brush species on agricultural lands.

Modeling Nutrient Loads from Poultry Operations in the Toledo Bend Reservoir and Sam Rayburn Reservoir Watersheds

Project Goals/Objectives: Collect GIS, landuse, management, and measured data for selected watersheds; Where measured data is available, calibrate SWAT watershed model to measured flow, sediment and nutrients; Simulate nutrient load for current conditions; Simulate for pre- and post- best management plan implementation conditions.

Project Location: Sam Rayburn Reservoir, Segment 0610 and Toledo Bend Reservoir, Segment 0504

Project Costs: Federal ($96,000); Non-Federal Match ($0); Total Project ($96,000)

Reducing Atrazine Losses in Central Texas

Project Goals/Objectives: Demonstrate the effects of alternative tillage practices and atrazine application practices on protecting water quality by reducing atrazine losses; Develop educational materials and present the demonstration results at agricultural meetings, field days, and conferences; Validate the CroPMan simulation model with measured atrazine losses to facilitate simulating long-term losses of atrazine and the probabilities of meeting EPA standard for safe drinking water; Analyze the economic costs, profits, and the cost effectiveness of alternative tillage me

SWAT Model Simulation of the Arroyo Colorado Watershed

Project Goals/Objectives: The project will consist of using a computer modeling software (SWAT model) and a geographic information system (GIS) to simulate the current sediment, BOD, and nutri

Watershed Protection Plan Development for Buck Creek

The Red River Basin includes 29 classified segments and 11 major reservoirs covering 145,169 acres. Buck Creek, also known as Spiller Creek, is a small waterbody situated within the Red River Basin and is located within a subwatershed to the Lower Prairie Dog Town Fork of the Red River (Segment 0207). This stream segment is located within Ecoregion 27, Central Great Plains. Small streams within this region are typically characterized by widely varying flows and high levels of dissolved salts, generally originating from saltwater seeps and springs.

Watershed Protection Plan Development for the Navasota River below Lake Limestone

Project Goals/Objectives: 1) Characterize current bacteria loadings and sources for the watershed 2) Determine needed levels of loading reduction to restore the waterbody 3) Work with watershed stakeholders to select and prioritize management measures needed to restore the waterbody 4) Develop a watershed protection plan for the Navasota River below Lake Limestone