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TitleGuidelines for low cost subsurface sonar imaging, Ottawa River/Quyon, Quebec, test case
DownloadDownloads
AuthorPrévost, C
SourceGeomatics Canada, Open File 16, 2015, 51 pages, https://doi.org/10.4095/296588
Year2015
PublisherNatural Resources Canada
Documentopen file
Lang.English
Mediaon-line; digital
RelatedThis publication is a translation of Prévost, C; (2014). Guide de production d'imagerie sonar à l'aide d'outils grand public - Étude de cas à la rivière des Outaouais à Quyon, Québec, Geomatics Canada, Open File 5
File formatpdf
ProvinceQuebec
NTS31F/09
AreaOttawa River; Quyon
Lat/Long WENS-76.5000 -76.0000 45.7500 45.5000
Subjectsgeophysics; hydrogeology; remote sensing; sonar surveys; bathymetry; rivers; landslides
Illustrationsphotographs; images; location maps
Viewing
Location
 
Natural Resources Canada Library - Ottawa (Earth Sciences)
 
ProgramWestern Canada Geohazards Project, Public Safety Geoscience
Released2015 06 12
AbstractNatural 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 ID296588