Update Regional Skew Characteristics of Annual Peak Flows Through StreamStats

Accurate flood-frequency characteristics are required to design safe bridges and culverts. Unfortunately, flood-frequency characteristics can be determined directly only at stream crossings located at or near streamflow-gaging stations with long periods of peak-flow record. Consequently, at most stream crossings, flood-frequency characteristics must be estimated. Those estimates typically have been determined from regional regression equations for streams that are unregulated and drain predominately rural areas. The last such set of regional regression equations developed for Ohio was based on peak-flow data collected through water year 2001. The goals of this research are to (1) evaluate and update regional estimates of skewness in peak-flow time series, (2) update flood-frequency estimates for Ohio streamflow gages based on the updated regional skew information and peak-flow data collected through water year 2014, (3) develop new regional regression equations relating selected basin characteristics to peak flows with annual exceedance probabilities ranging from 0.5 to 0.002, and (4) implement the regional regression equations in the U.S. Geological Survey's StreamStats application (http://streamstats.usgs.gov).


  • English


  • Status: Completed
  • Funding: $139315
  • Contract Numbers:



  • Sponsor Organizations:

    Ohio Department of Transportation

    Research Program
    1980 West Broad Street
    Columbus, OH  United States  43223

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Project Managers:

    Syar, Jeff

  • Performing Organizations:

    U.S. Geological Survey

    6480 Doubletree Ave.
    Columbus, OH  United States  43229-1111
  • Principal Investigators:

    Koltun, G

  • Start Date: 20151001
  • Expected Completion Date: 20190331
  • Actual Completion Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 01575534
  • Record Type: Research project
  • Source Agency: Ohio Department of Transportation
  • Contract Numbers: 27243, 15EMOH034
  • Files: RIP, STATEDOT
  • Created Date: Sep 3 2015 12:43PM