Side scan sonar uses waves to define the profile and composition of the river bottom.
These waves are reflected by the submerged objects. Beyond the object, there remains a dark area where the wave has not penetrated. It creates a shadow that is present on the sonar image. This shadow materializes the relief of an object at the bottom of the river. The equipment used makes it possible to locate the structures with a GPS position and to define the measurements of the objects encountered.
The position of each anomaly point from its geo location can be reported on a support such as Google Earth so as to obtain an image of the position and the environment of the anomaly point.
Published by