Stream and Watershed Delineations using LiDAR Data TR-692

Dr. Brian Gelder will use algorithms that were developed for the Iowa Highway Research Board (IHRB) (Gelder, 2015) to hydrologically enforce Light Detection and Radar Digital Elevation Models (LiDAR DEMs) for the watersheds of the 17 selected streamgages. The stream initiation methods will be used to generate at least four different stream networks for the watersheds of the 17 selected streamgages. The hydrologically enforced DEMs generated for 12-digit hydrologic unit codes (HUCs) will also be used to delineate new watershed boundaries for the total drainage area and for both the 20- and 2-percent AEP effective drainage areas for each of the streamgages for use in measuring basin characteristic values. The two effective drainage areas will be delineated as subsets of the total watershed area that actually contributes streamflow for given storm events, such as 20- and 2-percent AEP 24-hour rainfalls. The project proposes to use 20- and 2- percent AEPs in this study for effective drainage areas, along with the total drainage area, as this should cover the range of drainage areas well without calculating every AEP. LiDAR-generated areas of topographic depressions will be classified by storage volume and effective drainage areas will be delineated on the basis of whether this storage volume is exceeded by a given storm event.

  • Supplemental Notes:
    • This project is related to, and adds to, "Investigation of Stream-Channel and Watershed Delineations and Basin-Characteristic Measurements using LiDAR Data for Small Drainage Basins in Iowa Located Within the Des Moines Lobe Landform Region"


  • English


  • Status: Completed
  • Funding: $49844
  • Contract Numbers:

    TR-692; ISU proposal 132257

    Add 554

  • Sponsor Organizations:

    Iowa Department of Transportation

    800 Lincoln Way
    Ames, IA  United States  50010
  • Project Managers:

    Goetz, Vanessa

  • Performing Organizations:

    Iowa State University, Ames

    Institute for Transportation
    2711 South Loop Drive, Suite 4700
    Ames, Iowa  United States  50010-8664
  • Principal Investigators:

    Gelder, Brian

  • Start Date: 20150801
  • Expected Completion Date: 20170930
  • Actual Completion Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 01578117
  • Record Type: Research project
  • Source Agency: Iowa Department of Transportation
  • Contract Numbers: TR-692; ISU proposal 132257, Add 554
  • Files: RiP, STATEDOT
  • Created Date: Sep 24 2015 10:24AM