Integration of LiDAR and Multibeam Sonar to the EchoBoat USV Application Note for simultaneous above & below Water Levee Inspection
- Published: 24 July 2017
- Written by Kaydee Greene
Equipment Used: Seafloor EchoBoat USV, Norbit iWBMSc multibeam echosounder, Velodyne Puck VLP-16 LiDAR, Applanix POS MV Surfmaster INS, Hypack and Hysweep software.
mid-19th century, most of the region has been grad-ually claimed for agriculture. Wind erosion and oxidation have led to widespread subsidence on the Central Delta islands; much of the Delta region today sits below sea level, behind levees earning it the nickname "California's Holland". 
Since 1900, there have been over 160 levee failures in the Sacramento–San Joaquin River Delta. These numbers include multiple failures of a single levee structure. Levee failures, also known as breaches, becaused by overtopping or structural failure. One of the most recent examples of levee failure in the Sacramento–San Joaquin River Delta occurred in June 2004 when a levee breach caused more than 150,000 acre·ft (190,000,000 m3) of water to flood the entire island of Jones Tract. Follow-ing a nearly 5-year drought cycle for the entire State of California, Winter and Spring 2016-2017 produced one of the wettest seasons on record, enabling the entire state to emerge from the drought. In January 2017 more levees breached.  This was mostly due to extremely high flow conditions from rainfall followed by rapid snowmelt delivering tremendous amounts of water through the levees structures. Several sections of the Levee system were identified by the CADWR as high risk for failure and a contract was let to R.E.Y. Engineers of Folsom, CA to survey the levee both above and below the waterline for integrity.
LiDar Data Set
Bathymetry Data Set
Telephone Pole with Vegetation