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The Science of Flood Management

Managing Our Flood Risk

Proper watershed management is the first step to lessening disastrous flooding.

Exactly what is a watershed?

It is all the land area that drains water into a common place, usually a river, stream or lake.  Weather events happening miles and miles away from these bodies of water can dramatically affect their levels, flow and intensity and cause severe flooding.   

Implementing appropriate management practices is important to sustaining and enriching life in the San Antonio River Watershed and control the devastating effects of flooding. The goal of the River Authority is to reach a sensible balance between physical, chemical, biological and economic factors while still maintaining the integrity of the watersheds throughout the San Antonio River Basin.

Because these factors are always evolving, an effective watershed management plan involves a never-ending cycle of planning, assessing, and implementing.

Here’s a closeup look at a Watershed Management Cycle:

Aerial view of flood waters held back by levee
Watershed Management Cycle

Collect water at specific locations and test to gather specific data.

Compare current water quality to state and federal standard or establish desired future conditions.

Develop goals and strategies to maintain or achieve water quality standards and meet future demands.

Implement goals and strategies through public policy, best management practives (BMPs) and education.

Determine the specific watershed and issues to be studied. Identity the stakeholders and resource personnel.

The River Authority constantly measures results to make sure the watershed management plan is performing at its highest level and adjust the program where needed.

Data Driven. Scientist Approved.

Another invaluable tool for flood control is a Watershed Master Plan.

It helps educate everyone about changes in land use, potential new building projects and modifications to regulations governing development within the basin. It’s particularly important as an information tool for decision makers whose actions and policies can affect the health of a watershed.

As the regional technical planning lead in watershed management, the San Antonio River Authority has made significant investments in collecting and maintaining watershed data and developing complex analytical tools and models to make scientifically sound watershed management recommendations.

City planners working with flood map

What's in Your Watershed?

The Watershed Master Plan Viewer displays information from the various Watershed Master Plan reports, as well as other useful reference data. This tool assists the stakeholders, decision-makers, and the public visualize and understand the challenges and potential solutions to watershed management. Explore your watershed using our Watershed Master Plan Viewer:

Alerts

Paddling Trail Closure: SASPAMCO

Recently, SAWS released a limited amount of water with reduced oxygen levels which impacted water quality. While the oxygen levels are returning to normal, the River Authority is closing the SASPAMCO paddling trail, which begins in Southern Bexar County and extends into Wilson County. Additionally, River Crossing Park will be closed along with the lower sections of Graytown and Helton Nature Park.

Confluence Park Notice: Temporary Water Supply Shutdown for Maintenance

Please be advised that the water supply will be temporarily shut down for maintenance purposes on April 17th at 11 am. This procedure will impact the sinks, water fountain, and the hose spigot located outside the back door of the Education Center. We anticipate that the process will take no more than a few hours to complete. Thank you for your understanding and cooperation.

Trail Closure Notice: San Pedro Creek Culture Park

The west bank of the San Pedro Creek trail will be closed from the access point at Commerce St south to Dolorosa until further notice due to maintenance work. Alternate route w/ ADA access is on the east bank trail that can be accessed either from the Commerce or Dolorosa crossing.

SASPAMCO Paddling Trail

The SASPAMCO paddling trail is now 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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