Developing Peak Rate Factor (PRF) Guidance in Hydrologic Modeling

The current Texas practice in Peak Rate Factor (PRF) calculation is to adjust PRF after initial Hydrologic modeling, based on the NRCS dimensionless unit hydrograph, has been performed as a rough calibration to expected values. Changes to PRF values have an effect on the peak flow values and the resulting sizes for hydraulic structures. Recommended PRF values for varied watersheds and physiographic regions in Texas was not previously taken into account. The research teams shall complement the work of Project 0-7010 by performing additional tasks including data collection and analysis to establish solid guidance for a range of reasonable PRF values for different hydro-physiographic provinces of Texas based on the distribution of observed PRF values.

• Record URL:
  https://library.ctr.utexas.edu/Presto/project=7010-01
• Supplemental Notes:
  • Continues project 0-7010

Language

• English

Project

• Status: Completed
• Funding: $87915
• Contract Numbers:

  0-7010-01

• Sponsor Organizations:

  Texas Department of Transportation

  125 E. 11th Street
  Austin, TX  United States  78701-2483
• Managing Organizations:

  Texas Department of Transportation

  125 E. 11th Street
  Austin, TX  United States  78701-2483
• Project Managers:

  Pridgen, Shelley

• Performing Organizations:

  The University of Texas at San Antonio

  One UTSA Circle
  San Antonio, TX  United States  78249

  Texas A&M Transportation Institute, College Station

  Texas A&M University System
  3135 TAMU
  College Station, TX  United States  77843-3135
• Principal Investigators:

  Sharif, Hatim

• Start Date: 20210623
• Expected Completion Date: 20220331
• Actual Completion Date: 20220331

Subject/Index Terms

• TRT Terms: Hydraulic structures; Mathematical models; Peak discharge; Water control
• Geographic Terms: Texas
• Subject Areas: Hydraulics and Hydrology; Transportation (General);

Filing Info

• Accession Number: 01782646
• Record Type: Research project
• Source Agency: Texas Department of Transportation
• Contract Numbers: 0-7010-01
• Files: RIP, STATEDOT
• Created Date: Sep 22 2021 5:19PM