Mapping Fluvial Ecosystems
Light detection and ranging (lidar) wave-form processing capabilities are being developed to utilize the
U.S. Geological Survey Coastal and Marine Geology Program
Experimental Advanced Airborne Research (EAARL) sensor. The EAARL lidar point cloud collection consists of highly detailed submerged and shallow bathymetry (water depth) of river channels, which will be merged with land elevation surfaces (topography) to derive topobathymetric elevation models.
In 2014, a Delaware River Basin focal region was
for drainage structures (culverts/bridges) that impeded down slope surface flow across the digital elevation model (DEM). The addition of the submerged bathymetric elevation data from the EAARL acquisition will enhance the hydrologically-enforced DEM, allowing scientists to study surface flow in the river channel.
This image shows topobathymetric data in the Delaware River near Hancock, New York. These data were developed with waveform processing from lidar data collected with an EAARL sensor aboard an aircraft. U.S. Geological Survey (USGS) images created by Gayla Evans.
An elevation profile of the Delaware River near Hancock, New York. USGS image created by Gayla Evans.