Improving Water Quality Through Modeling Tools

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San Antonio River

Last Updated on March 31, 2023

As part of the San Antonio River Authority’s (River Authority) mission of being committed to safe, clean, enjoyable creeks and rivers, the staff at the River Authority are experts in understanding and caring for the San Antonio River as well as its tributaries. The River Authority regularly conducts water quality monitoring and performs biological and habitat assessments throughout the San Antonio River Basin to keep tabs on the condition of this important ecoregion. The work done by our staff has also received several national recognitions for the innovative use of software modeling tools that help improve the health of area creeks and rivers.

Learn more about these modeling tools and how the work of our talented staff was recognized by the Water Environment Federation!

Water Quality Modeling

The untreated rainwater that goes into storm drains and directly to area creeks and rivers is known as stormwater runoff. Data from River Authority water quality monitoring indicates that pollutants carried by stormwater runoff are the greatest threat to river health.

Sheeba Thomas, Ph.D., Senior Technical Engineer in the River Authority’s Ecological Engineering Department, oversaw the creation of modeling tools to provide quantitative water quality master planning. These tools help to better understand the conditions of the basin in order to determine the pollution load from a land area that can potentially drain into the creek and river systems. Some of the functions of these modeling tools include measuring how much pollution can be reduced in a given area and the number of stormwater management structures needed to limit increased loads of pollutants.

National Recognition

River Authority's Senior Technical Engineer Sheeba Thomas featured in the Jan 2021 issue of Municipal Sewer and Water Magazine.

The Water Environment Federation (WEF) selected the River Authority, civil engineering firm Lockwood, Andrews & Newnam Inc. (LAN), and integrated solutions partner RESPEC as the recipients of the 2020 Project Excellence Award. WEF’s annual Project Excellence Award pays tribute to excellence and innovation in the execution of projects and programs in the water sector.

The River Authority and partners were recognized for helping address the lack of suitable tools to conduct quantitative assessment to effectively implement Best Management Practices and low impact development strategies to address urban stormwater runoff pollution. Following the award announcement, the work has also been recognized by the industry and has been highlighted in trade publications like Municipal Sewer & Water Magazine.

The River Authority is proud of the work accomplished by Dr. Thomas and our Ecological Engineering team in collaboration with our project partners. Their important work is helping to advance our vision of inspiring actions for healthy creeks and rivers! Learn more about water quality by visiting our website and find out how you can help us in our efforts!

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Alerts

Park Closure Notice: Trueheart Ranch

Unfortunately, Trueheart Ranch Nature Park (14984 Blue Wing Rd, San Antonio, TX 78221) is closed until further notice due to recent vandalism. We’re working to assess and repair the damage to ensure the park is safe and welcoming for everyone. Thank you for your understanding—updates will be shared as soon as we have them.

Trail Closure – San Pedro Creek Culture Park

* Trail temporarily closed from 5/1/2025 until 9/1/2025.

Due to adjacent construction work, the San Pedro Creek Trail on the west side of the creek will be closed from the access
point at W. Nueva Street to Dolorosa Street until further notice. Alternate route with ADA access is on the east side of the creekSan Pedro Creek Culture Park Trail Closure

Trail Closure: Museum Reach at Pearl

* Trail temporarily closed from 2/3/2025 until 5/16/2025.
* For southbound pedestrian traffic, please exit the river and utilize the Hotel Emma bridge to gain access to the east side river trail. Access to the east side river trail via the elevator or stairs.
* For northbound pedestrian traffic, please exit the river trail at the south bridge to gain access to the east side river trail. Continue north through Pearl towards Hotel Emma. The west & east side river trail accessible via the Hotel Emma bridge.

North Bridge West Landing & Stairs Trail Closure Map

 

Graytown Park Parking Lot Construction Notice 

Construction Timeline: April – October 2024 (estimated)

Improvements are coming to Graytown Park! Parking lot construction will begin in April, and we appreciate your patience as we work to enhance the park for all visitors.

Temporary Closures & Impacts:

  • Upper parking area, pavilion, and restrooms will be CLOSED during construction. Temporary restroom facilities will be provided.
  • Park and river access will be CLOSED Monday–Friday from 8 AM – 5 PM (no access during these hours).

We encourage visitors to plan accordingly and check back for updates as the project progresses. Thank you for your support!

Stay Updated: Follow us on social media for the latest updates.

Goliad Paddling Trail Alert

NOTICE: HWY 59 Landing Site Closed

Due to TxDOT construction on the HWY 59 Bridge, the HWY 59 landing site is closed until further notice. However, the Goliad Paddling Trail remains open, and paddlers can still access the river at the Riverdale, Ferry Street, and Goliad State Park landings.

Please plan accordingly and check back for updates.

SASPAMCO Paddling Trail Temporarily Closed

Staff have removed two large log jams just downstream of Helton Nature Park, keeping the southern portion of the SASPAMCO Paddling Trail temporarily closed. Staff are working to contact adjacent landowners to support a land-based removal solution.

SASPAMCO Paddling Trail

The SASPAMCO paddling trail is open from River Crossing Park to Helton Nature Park.
*Please Note: Paddling Trail from Helton Nature Park to HWY 97 is still closed due to blockages. 

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