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 http://pubs.usgs.gov/fs/2014/3051/ and http://pubs.er.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
- Overview
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 http://pubs.usgs.gov/fs/2014/3051/ and http://pubs.er.usgs.gov/publication/sir20105059.
Sources/Usage: Public Domain. Visit Media to see details.Surfaces showing topographic elevation surface with road fill over a culvert (left image) and hydrologic elevation surface with hydrologic-enforcement at the drainage structure (culvert) location. - Science
Below are other science projects associated with this project.
Coastal National Elevation Database (CoNED) Applications Project
High-resolution coastal elevation data is required to identify flood, hurricane, and sea-level rise inundation hazard zones and other earth science applications, such as the development of sediment transport and storm surge models. Light detection and ranging (lidar) enables the rapid collection of very accurate elevation data over large areas, and during the last decade, airborne laser altimetry...Coastal National Elevation Database (CoNED) Applications Project
High-resolution coastal elevation data is required to identify flood, hurricane, and sea-level rise inundation hazard zones and other earth science applications, such as the development of sediment transport and storm surge models. Light detection and ranging (lidar) enables the rapid collection of very accurate elevation data over large areas, and during the last decade, airborne laser altimetry... - Publications