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

Stay Weather‑Aware This Weekend

Stay Weather‑Aware This Weekend

Rain is expected across the region this weekend, which may result in high water on roads and temporary closures at low water crossings.

Before heading out, residents are encouraged to check SARiverFlood.org or their local county flood website for real‑time roadway conditions:

These sites provide up‑to‑date information from flood‑monitoring sensors across the region. Real‑time updates are available 24/7 to help you stay informed as conditions change.

Please use caution when traveling and plan routes accordingly.

Restroom Closure Notice – Camino Coahuilteca (Acequia Park Trail)

 

Restroom Closure Notice – Camino Coahuilteca (Acequia Park Trail)

The restrooms at Camino Coahuilteca along the Acequia Park Trail will be temporarily closed on Thursday, April 16 due to parking lot improvements in the area.

We encourage visitors to plan accordingly and utilize nearby facilities during this time.

We appreciate your patience as we complete this work to enhance the park experience.

 

Museum Reach – Oxbow Trail Closure Notice

The Oxbow Trail along the Museum Reach will be temporarily closed beginning Monday, April 13 through May 1 to accommodate project-related work in the area.

For public safety, access to this section of the trail will be restricted during this time. Visitors are encouraged to plan accordingly and use alternate routes.

Wayfinding signage and trail closure notices will be posted at designated locations to help guide trail users around the closure.

We appreciate your patience and understanding as we complete this work to help maintain safe and enjoyable trail conditions.

San Pedro Creek Culture Park

The east bank trail along San Pedro Creek will be temporarily closed between the upper trail at Cameron St. and the lower trail at two access points.

Closure details:

  • The first closure will impact the connector from the upper trail near West Houston St. to the south lower San Pedro Creek trail.
  • Once work at this location is complete and the trail reopens, construction will shift to the second closure area between the upper and lower trails on the opposite side of the green space.

Please follow posted signage and plan alternate routes. We appreciate your patience as this work is completed.

Closed areas around San Pedro Creek Culture Park

The Brackenridge Trail

Trail Lighting Notice – Brackenridge Park Trail

Due to an electrical issue, lighting is currently out along the north portion of the trail, from the Josephine Street inlet to just past Highway 281 within the Brackenridge Park Trail. Our team is actively working to correct the issue and expects repairs to be completed by the end of business tomorrow.

We apologize for any inconvenience this may cause and appreciate your patience as we work to restore lighting. Please use caution when traveling through this area, especially during evening hours.

Trail Closure Alert – Calder Alley, San Pedro Creek

Maintenance work will be done in Calder Alley starting Wednesday, September 18, 2025.

  • Trails will remain open during this work.
  • One bench at a time will be temporarily barricaded while improvements are completed.
  • There may be occasional contractor pickups in the area.

We appreciate your patience as we continue to maintain and improve San Pedro Creek for all to enjoy!

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. 

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.

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.

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