| Title | Guidelines for low cost subsurface sonar imaging, Ottawa River/Quyon, Quebec, test case |
| Download | Downloads |
| |
| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Prévost, C |
| Source | Geomatics Canada, Open File 16, 2015, 51 pages, https://doi.org/10.4095/296588  Open Access |
| Image |  |
| Year | 2015 |
| Publisher | Natural Resources Canada |
| Document | open file |
| Lang. | English |
| Media | on-line; digital |
| Related | This publication is a translation of Guide de production
d'imagerie sonar à l'aide d'outils grand public - Étude de cas à la rivière des Outaouais à Quyon, Québec |
| File format | pdf |
| Province | Quebec |
| NTS | 31F/09 |
| Area | Ottawa River; Quyon |
| Lat/Long WENS | -76.5000 -76.0000 45.7500 45.5000 |
| Subjects | geophysics; hydrogeology; remote sensing; sonar surveys; bathymetry; rivers; landslides |
| Illustrations | photographs; images; location maps |
| Program | Public Safety Geoscience Western Canada Geohazards Project |
| Released | 2015 06 12 |
| Abstract | Natural Resources Canada (NRCAN) has the mandate of providing essential geographic information. An improved knowledge of our physical environment represents one of the basis of this mandate. This
essential baseline information is generally associated with the terrestrial or landmass environment. The geographic knowledge of the underwater environment often represents the weak segment in the chain linking terrestrial units together. In the
geohazard domain, also a NRCAN mandate, the development of mitigation strategies for geohazards, including landslide, rely on accurate underwater terrain information.
Recently, there have been consumer grade, low cost, side scan imaging sonars
capable of imaging the floor of a lake, a river or a coastline. These tools are targeted for sport fishing and diving markets but they are also capable of partly providing an image view of the lake and river floor. These tools, which are versatile,
portable and easy to use can have scientific and technological applications, such as the subsurface geomorphological mapping of lake and river floors: bedrock outline, contact between sediments and bedrock, lineaments, sand waves location and various
forms of erosion / deposit. Therefore, low cost consumer grade side scan sonars can partly fill the technology / scientific information gap for essential geographic information and geohazards, and are particularly well suited for the Canadian North
and in remote or difficult to access areas.
A case study was carried out in Quyon (Québec) area, in the Ottawa region, to determine the potential of these tools for the geomorphological mapping of a river floor, as it may relate to landslide
characterization in the area. This document explains the main constraints for a high quality survey and recommends ways to overcome them. It also provides guidelines for image acquisition. Several image examples and interpretation are presented as
well as the findings resulting from this case study. |
| Summary | (Plain Language Summary, not published)
Recently, there have been consumer grade, low cost, side scan imaging sonars capable of imaging the floor of a lake, a river or a coastline. These tools
are targeted for sport fishing but are also capable of providing an image of the lake and river floor. These tools, which are easy to use, can have scientific and technological applications, such as the subsurface geomorphological mapping of lake
and river floors: bedrock outline, contact between sediments and bedrock, lineaments, sand waves location and various forms of erosion / deposit. Consumer grade imaging sonars can partly fill the technology / scientific information gap, and are
particularly well suited for the Canadian North and in remote areas. A case study was carried out in Quyon, in the Ottawa region, to determine the potential of these tools for the geomorphological mapping of a river floor, as it may relate to
landslide characterization in the area. This document explains the main constraints for a high quality survey and recommends ways to overcome them. |
| GEOSCAN ID | 296588 |
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