Hydrologic-Enforcement of Lidar DEMs
Hydrologic connectivity of light detection and ranging (lidar)-derived elevation data is critical for coastal hydrologic modeling applications. However, unless hydrologically-enforced, raised structures (i.e. bridges, roads overlaying culverts) can block overland flow to coastal waters. Because highly detailed lidar-derived elevation surfaces include features such as bridge decks and road fill overlying culverts, artificially pooled depressions that form upstream of drainage structures impede down slope flow. Hydrologic-enforcement enables hydrologic models to simulate flow under bridges and through culverts by modifying the elevations of artificial impediments.
Hydrologically-enforced lidar-derived elevation data are an essential base layer for complex modeling of surface water flow. The USGS Coastal and Marine Geology Program is integrating hydrologically-enforced lidar-derived land elevation and lidar-derived bathymetry (water depth) to enhance storm surge modeling in vulnerable coastal zones. Hydrologic-enforcement of topobathymetric surfaces has rarely been employed to achieve hydrologic connectivity.
Additional information on hydrologic-enforcement is available at https://pubs.usgs.gov/fs/2014/3051/ and https://pubs.usgs.gov/publication/sir20105059.
Below are other science projects associated with this project.
Coastal National Elevation Database (CoNED) Applications Project
Coastal National Elevation Database (CoNED) Applications Project
Hydrologic connectivity of light detection and ranging (lidar)-derived elevation data is critical for coastal hydrologic modeling applications. However, unless hydrologically-enforced, raised structures (i.e. bridges, roads overlaying culverts) can block overland flow to coastal waters. Because highly detailed lidar-derived elevation surfaces include features such as bridge decks and road fill overlying culverts, artificially pooled depressions that form upstream of drainage structures impede down slope flow. Hydrologic-enforcement enables hydrologic models to simulate flow under bridges and through culverts by modifying the elevations of artificial impediments.
Hydrologically-enforced lidar-derived elevation data are an essential base layer for complex modeling of surface water flow. The USGS Coastal and Marine Geology Program is integrating hydrologically-enforced lidar-derived land elevation and lidar-derived bathymetry (water depth) to enhance storm surge modeling in vulnerable coastal zones. Hydrologic-enforcement of topobathymetric surfaces has rarely been employed to achieve hydrologic connectivity.
Additional information on hydrologic-enforcement is available at https://pubs.usgs.gov/fs/2014/3051/ and https://pubs.usgs.gov/publication/sir20105059.
Below are other science projects associated with this project.