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
For additional information contact:
Part or all of this report is presented in Portable Document Format (PDF). For best results viewing and printing PDF documents, it is recommended that you download the documents to your computer and open them with Adobe Reader. PDF documents opened from your browser may not display or print as intended. Download the latest version of Adobe Reader, free of charge. More information about viewing, downloading, and printing report files can be found here.
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., https://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)