Research on Dimensionless Unit Hydrograph and Time of Concentration for Maryland Watersheds

The overall goal of this research project is to provide guidance for selection of appropriate peak rate factor (PRF) and time of concentration (tc) for watershed modeling in the various provinces of Maryland. PRF and tc should be selected and/or calculated as functions of readily observable watershed characteristics. The currently used regression equation to calculate tc from watershed characteristics has a standard error of 30%; including additional data in the regression analysis should reduce that standard error. The research team will seek to provide methods to estimate the margin of error in model calculations of peak discharge, which can be combined with margin of error in regional regression equations for calibration of predictive models used for engineering design.

Language

• English

Project

• Status: Completed
• Funding: $145114
• Contract Numbers:

  SP709B4E

• Sponsor Organizations:

  Maryland Department of Transportation State Highway Administration

  707 North Calvert Street
  Baltimore, MD  United States  21202
• Project Managers:

  Xiang, Hua

• Performing Organizations:

  University of Maryland, College Park

  Department of Civil and Environmental Engineering
  College Park, MD  United States  20742
• Principal Investigators:

  Brubaker, K

• Start Date: 20180816
• Expected Completion Date: 20210831
• Actual Completion Date: 20210831

Subject/Index Terms

• TRT Terms: Calibration; Hydrographs; Methodology; Peak discharge; Regression analysis; Watersheds
• Geographic Terms: Maryland
• Subject Areas: Hydraulics and Hydrology; Transportation (General);

Filing Info

• Accession Number: 01698869
• Record Type: Research project
• Source Agency: Maryland State Highway Administration
• Contract Numbers: SP709B4E
• Files: RIP, STATEDOT
• Created Date: Mar 14 2019 1:41PM