• Home >
  • Back Issues >
  • Erosion Control >
  • January/February 2020

    • January/February 2020

    Dec. 19, 2019
    John Gallop/Getty Images
    Ec2001 26
    Dec. 19, 2019
    Darryl Brooks/Dreamstime
    Ec2001 22
    Dec. 19, 2019
    Dec. 19, 2019
    Robert Leeper, Haley & Aldrich, and UC Riverside
    High resolution hill shade orthomosaic of a portion of the Las Lomas watershed. The contour interval is 10 feet and the scale bar is 180 feet. Top: The UAS flight operation was conducted on December 24, 2016, following a series of moderate to intense rainstorms over the burn area. Revised hydrologic flow paths based on the updated digital surface model from the UAS flight are shown as black bold lines and highlight new possible flow directions. On the right, a colored elevation digital terrain model overlay. Bottom: The UAS flight operation was conducted on October 15, 2016, prior to any rainfall over the burn area. Hydrologic flow paths derived in GIS are shown as black bold lines and depict possible paths where water may flow. On the right, a colored elevation digital terrain model overlay.
    Dec. 19, 2019