Assessing Highway System Impacts on Total Maximum Daily Load (TMDL) Watersheds Using the Stochastic Empirical Loading and Dilution Model (SELDM)

The proposed study has three primary objectives: The first objective is to develop and demonstrate techniques for geographic analysis that use the roadway and land use/land cover information in Streamstats to apply Stochastic Empirical Loading and Dilution Model (SELDM) at selected points in the watershed. These techniques will include manual and batch-processing techniques that can be used to help model contributions of flows, concentrations and loads of stormwater from highway sites and other upstream land uses. These techniques will be used to do mass-balance analyses in selected watersheds with SELDM based on the land use/cover percentages upstream of any selected highway site. The second objective is to demonstrate methods for using SELDM with statistics on the quantity and quality of runoff from highways and other land uses and best management practices (BMP) treatment statistics to model the cumulative effects of runoff from different areas at different points in a stream basin. These techniques can be used by Oregon Department of Transportation (ODOT) to help identify the application of mitigation measures to maximize benefits, while minimizing potential effects of runoff on receiving streams within a watershed, minimizing costs for implementing stormwater BMPs. The third objective creates guidance for watershed-scale analyses using SELDM that are based on results and experience learned in the second objective and document this information in at least one report.


    • English


    • Status: Active
    • Funding: $173217
    • Contract Numbers:

      SPR 798

    • Sponsor Organizations:

      Federal Highway Administration

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

      Oregon Department of Transportation

      555 13th Street NE
      Salem, OR  United States  97301
    • Project Managers:

      Glover-Cutter, Kira

    • Performing Organizations:

      U.S. Geological Survey

      Oregon Water Science Center
      2130 SW 5th Avenue
      Portland, OR  United States  97201
    • Principal Investigators:

      Risley, John

    • Start Date: 20160701
    • Expected Completion Date: 20190430
    • Actual Completion Date: 0

    Subject/Index Terms

    Filing Info

    • Accession Number: 01604632
    • Record Type: Research project
    • Source Agency: Oregon Department of Transportation
    • Contract Numbers: SPR 798
    • Files: RiP, STATEDOT
    • Created Date: Jul 11 2016 4:12PM