Modernize Hydrologic Prediction Processes by Creating Custom Statewide SSURGO Green and Ampt Parameter Database

The current edition of the Nevada Department of Transportation (NDOT) Drainage Manual was last updated in 2006. Though it is based on the American Association of State Highway and Transportation Officials’ model drainage manual, new improved methods of monitoring hydrologic processes have been developed. NDOT presently uses the NRCS Curve Number method for estimating runoff; however, the NRCS Curve Number method does not consider rainfall intensity and duration, but only total rainfall volume and is a curve fitting empirical method. The Green and Ampt methodology, which is a physically based rainfall loss determination method, has shown to provide significantly improved accuracy and reliability in projection of soil infiltration. Increased reliability in improving hydrologic prediction also improves designs and makes possible more consistent project cost estimates. The Green and Ampt soils infiltration parameters were computed for all Nevada SSURGO soil map units and for the Nevada STATSGO general soils, the results of which include a productive course of action.

Language

  • English

Project

  • Status: Completed
  • Funding: $89,180
  • Contract Numbers:

    P674-19-803

  • Sponsor Organizations:

    Nevada Department of Transportation

    1263 South Stewart Street
    Carson City, NV  United States  89712

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Managing Organizations:

    Nevada Department of Transportation

    1263 South Stewart Street
    Carson City, NV  United States  89712
  • Project Managers:

    Matthews, Brian

    Kumar, Manju

  • Performing Organizations:

    JE Fuller Hydrology & Geomorphology, Inc.

    8400 S Kyrene Road
    Suite 201
    Tempe, AZ  United States  85284
  • Principal Investigators:

    Ahern, Jon

  • Start Date: 20191030
  • Expected Completion Date: 20201231
  • Actual Completion Date: 20201231
  • USDOT Program: Transportation, Planning, Research, and Development
  • Subprogram: Research

Subject/Index Terms

Filing Info

  • Accession Number: 01841104
  • Record Type: Research project
  • Source Agency: Nevada Department of Transportation
  • Contract Numbers: P674-19-803
  • Files: RIP, STATEDOT
  • Created Date: Mar 29 2022 12:01PM