Fact Sheet 2014–3051
Hydrologic-enforcement (hydro-enforcement) of light detection and ranging (lidar)-derived digital elevation models (DEMs) modifies the elevations of artificial impediments (such as road fills or railroad grades) to simulate how man-made drainage structures such as culverts or bridges allow continuous downslope flow. Lidar-derived DEMs contain an extremely high level of topographic detail; thus, hydro-enforced lidar-derived DEMs are essential to the U.S. Geological Survey (USGS) for complex modeling of riverine flow. The USGS Coastal and Marine Geology Program (CMGP) is integrating hydro-enforced lidar-derived DEMs (land elevation) and lidar-derived bathymetry (water depth) to enhance storm surge modeling in vulnerable coastal zones.
First posted July 17, 2014
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Poppenga, S.K., Worstell, B.B., Danielson, J.J., Brock, J.C., Evans, G.A., and Heidemann, H.K., 2014, Hydrologic enforcement of lidar DEMs: U.S. Geological Survey Fact Sheet 2014–3051, 4 p., http://dx.doi.org/10.3133/fs20143051.
ISSN 2327-6932 (online)
Hydrologic Lidar DEMs
Hydro-Enforced Lidar DEMs
Hydro-Enforced Topobathymetric DEMs
Hydro-Enforced Topobathymetric DEMs for the Coastal National Elevation Database (CoNED)