Skip to main content


Buy Article:

$9.50 plus tax (Refund Policy)

Or sign up for a free trial

For millions of South Texas residents, quality of life is linked inextricably to the San Antonio River. More than 220 miles long, the river flows through five counties and comprises six major watersheds, with numerous jurisdictions, agencies and organizations dependent on the river's quality and quantity.

An Inter Local Agreement (ILA) was established among the San Antonio River Authority (SARA), the City of San Antonio (COSA), and Bexar County to establish a collaborative, regional approach toward flood control and storm water management, including both water quantity and quality. The ILA partners created the Bexar Region Watershed Management Coalition (BRWMC). The BRWMC focuses on the development of a comprehensive Regional Watershed Modeling System (RWMS) that will act as a single repository of spatial and modeling data for the entire San Antonio River Basin (SARB). The goal is to improve the quality of life, protect life and property, provide safe transportation during heavy rain and flood events, and provide a tool for the management of water quality (WQ) in storm water runoff and ambient waters.

The regional modeling effort is centered on the development and incorporation of new and existing models in a Geographical Information System (GIS) platform that will assist in flood mitigation planning, capital project prioritization, floodplain management, and other applications.

As a part of this effort, existing WQ data and models were inventoried, reviewed, assessed, and recommendations were made regarding existing studies and supporting geospatial data. Procedures for establishing watershed geo-databases using the Arc Hydro data management system were also developed. This system provides spatial, time and flow linkages between the selected hydrologic and hydraulic (H&H) models such as HEC-RAS and HEC-HMS models, and the WQ models, such as HSPF and QUAL-TX. The developed WQ models are to link with the H&H models to ensure consistency in H&H simulations.

The GIS-based models will be continuously updated and used to evaluate proposed development, revise FEMA maps, prioritize capital improvement projects, support permit and standard compliance, support the removal of stream segments from the 303(d) list and avoid unwarranted TMDL studies, assess impacts from upstream developments and agricultural runoff, evaluate effectiveness of Best Management Practices (BMPs), identify site-specific WQ issues, evaluate needs for biomonitoring, and support WQ trend analysis.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Data/Media
No Metrics

Document Type: Research Article

Publication date: 2004-01-01

More about this publication?
  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

    A subscription to the Proceedings of the Water Environment Federation includes access to most papers presented at the annual WEF Technical Exhibition and Conference (WEFTEC) and other conferences held since 2000. Subscription access begins 12 months after the event and is valid for 12 months from month of purchase. A subscription to the Proceedings of the Water Environment Federation is included in Water Environment Federation (WEF) membership.

    WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access. Access begins 12 months after the conference or event
  • Subscribe to this Title
  • Membership Information
  • About WEF Proceedings
  • WEFTEC Conference Information
  • Learn about the many other WEF member benefits and join today
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more