Levee crest elevation profiles derived from airborne lidar-based high resolution digital elevation models in south Louisiana
| Autor: | John A. Barras, Cindy A. Thatcher, Monica Palaseanu-Lovejoy |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Hydrology
geography education.school_district geography.geographical_feature_category Lafourche Parish Elevation Sinuosity Structural basin Atomic and Molecular Physics and Optics Computer Science Applications Lidar Crest Computers in Earth Sciences education Levee Digital elevation model Engineering (miscellaneous) Geology |
| Zdroj: | ISPRS Journal of Photogrammetry and Remote Sensing. 91:114-126 |
| ISSN: | 0924-2716 |
| DOI: | 10.1016/j.isprsjprs.2014.02.010 |
| Popis: | This study explores the feasibility of using airborne lidar surveys to construct high-resolution digital elevation models (DEMs) and develop an automated procedure to extract levee longitudinal elevation profiles for both federal levees in Atchafalaya Basin and local levees in Lafourche Parish, south Lousiana. This approach can successfully accommodate a high degree of levee sinuosity and abrupt changes in levee orientation (direction) in planar coordinates, variations in levee geometries, and differing DEM resolutions. The federal levees investigated in Atchafalaya Basin have crest elevations between 5.3 and 12 m while the local counterparts in Lafourche Parish are between 0.76 and 2.3 m. The vertical uncertainty in the elevation data is considered when assessing federal crest elevation against the U.S. Army Corps of Engineers minimum height requirements to withstand the 100-year flood. Only approximately 5% of the crest points of the two federal levees investigated in the Atchafalaya Basin region met this requirement. |
| Databáze: | OpenAIRE |
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