|Title||Evaluating nearshore mapping capabilities of an autonomous kayak|
|Download||Download (whole publication) |
|Author||Pilegard, T; Dohner, S; Trembanis, A|
|Source||Program and abstracts: 2017 GeoHab Conference, Dartmouth, Nova Scotia, Canada; by Todd, B J; Brown, C J; Lacharité, M; Gazzola, V; McCormack, E; Geological Survey of Canada, Open File 8295, 2017 p. 94,
https://doi.org/10.4095/305911 (Open Access)|
|Publisher||Natural Resources Canada|
|Meeting||2017 GeoHab: Marine Geological and Biological Habitat Mapping; Dartmouth, NS; CA; May 1-4, 2017|
|Related||This publication is contained in Todd, B J; Brown, C J;
Lacharité, M; Gazzola, V; McCormack, E; (2017). Program and abstracts: 2017 GeoHab Conference, Dartmouth, Nova Scotia, Canada, Geological Survey of Canada, Open File 8295|
|Subjects||marine geology; surficial geology/geomorphology; environmental geology; geophysics; mapping techniques; oceanography; marine environments; nearshore environment; coastal studies; conservation; marine
organisms; marine ecology; resource management; biological communities; environmental studies; ecosystems; geophysical surveys; acoustic surveys, marine; sonar surveys; side-scan sonar; bathymetry; turbidity; storms; geological mapping; geological
mapping techniques; biology; habitat mapping; habitat conservation; habitat management; LiDAR; autonomous surface vehicles|
|Program||Offshore Geoscience, Ocean Management Geoscience|
|Released||2017 09 26|
|Abstract||Deep drafted survey vessels, autonomous underwater vehicles, and expensive aerial LiDAR surveys have limitations when conducting bathymetric surveys in the nearshore, shallow, turbid conditions. These
limitations are overcome with lightweight, shallow drafted autonomous surface vehicles (ASVs). |
Here, an autonomous kayak is tested as a practical, nearshore bathymetric survey platform, particularly in response to storm events. The accuracy and
functionality of the autopilot aboard the kayak was evaluated, and the preliminary results show the on-track variability to be within 10% of the error of the autopilot's GPS. The autonomy of the system allows for repeatable and comparable data sets
over the same area.
A storm in January 2017 allowed for a storm response survey in which the kayak was deployed three days before and six days after a storm event occurred at Broadkill Beach, Sussex County, DE. These surveys further proved the
viability of such a platform for not only nearshore coastal surveys but storm response bathymetric surveys as well.
The quality of bathymetric and side-scan data recorded by two different single beam echo sounder/side-scan units have also been
compared and evaluated, allowing for a cost-benefit analysis of the platform's payload. The preliminary budget for the kayak platform, including a single beam echo sounder/side-scan unit is relatively inexpensive at $3000. Based upon the early
results of accuracy, cost, and modularity of this system, it is a viable platform for nearshore bathymetric surveying.