The mission consists in surveying all submerged parts of the dam: the wall and seals between concrete blocks, the water inlet, sluice gates, bottom outlet…It used to be done by draining the whole reservoir prior to a visual inspection, but when reliable ROV were available, it appeared to be far less expensive and safer for the dam structure to do it using a ROV equipped with a video camera (and now also acoustic camera). The positionning system is then necessary for the ROV navigation, especially in case of poor visibility, and to offer a traceability of all measurements and recordings.
PLSM works in close cooperation with ROV companies and offers its equipments for sale or rent, as well as a full technical assistance including the equipment and personnel to operate it.
Equipment:
Sample of dam survey result in a narrow canyon (french Alpes)
The AQUA-
Result sample:
Dam Survey by ROV
Goal:
The AQUA-
The ROV trace and current location, as well as the model of the dam are displayed
in 3D using the BricsCad software (dwg compatible, interfaced to AQUA-
Vidéo of a dam survey:
(Made by JIFMAR company, using PLSM’s RTKDuo system)