Marine & Inland Structure Surveys
A marine structure survey provides an accurate representation of the submerged parts of a structure and, where required, its above-water elements. It documents the condition of the structure, the morphology of the surrounding seabed and any potential defects visible in the survey data.
CERES carries out these surveys to establish a baseline condition, support a targeted inspection or monitor changes over time. Surveys may cover breakwaters, jetties, quays, berms, rock armour, water-sports facilities and other structures used for coastal protection, berthing or mooring.
Marine Structure Surveys
Analysis and deliverables
The acquisition plan is tailored to the structure geometry, water depth, access constraints and survey objective.
The NORBIT iWBMS multibeam echosounder provides high-resolution coverage of submerged surfaces; the swath can be tilted to survey vertical walls and areas close to the structure.
The LiDAR scanner extends coverage to above-water elements and the shoreline. Data are georeferenced using RTK GNSS, corrected for vessel motion and sound-velocity variations, and quality checked. They can be used to assess walls and the toe of the structure, seabed morphology, scour, material accumulation, cavities, facing defects, obstructions, debris and displaced rock armour. When compatible historical surveys are available, a surface comparison can highlight erosion, accretion or movement of material.
Depending on the survey, deliverables may include bathymetric and topo-bathymetric charts, point clouds and 3D views, profiles and cross-sections, an anomaly register, XYZ, GeoTIFF, SHP, DXF, LAS or KMZ files, and an operations report.
