A corner stone of Total Hydrographic’s operations is to provide underwater survey solutions that can help Port and Harbour Authorities determine an appropriate dredging solution for their waterways. Dredging solutions often takes place because of sedimentation gradually encroaching in navigable waterways, and or when Port and Harbour authorities look to expanding their operations. Total Hydrographic were bought onboard to provide a Harbour Authority along the Great Ocean Road, with a bathymetric survey of their berths and channel to highlight areas of shoaling that could cause future navigational issues for larger fishing and berthing vessels. With our in house store of equipment we were able to respond quickly to our client, and undertake a pre-dredge survey days after talking to the client. The results from a rock wall scanning project can be seen within this video. The scan was undertaken to validate that the rock wall had been accurately constructed as per its design. Cross Section Profiles were extracted from this data and can be seen in the images.
This image is an extract from a hazard clearance survey of a lake. The client needed to know that there was a minimum clearance depth of water available at particular water levels. There were many hazards on the lake bed, however the survey revealed that they were all deeper than the client’s required depth.
Tree Point Cloud
– Left click and drag = rotate in 3D
– Right click and drag = pan
– Scroll wheel = zoom
After completion of an MBES survey there is a huge amount of information that is not always easy to interpret. Creating a 3D Flythrough of your detailed data set is a great way of interpreting the data and getting a clear understanding of what information has been captured. The Flythrough here really brings out the path taken by the old river prior to the creation of the reservoir.
This is an example of a habitat mapping project carried out by Total Hydrographic. An MBES survey was undertaken and then several outputs were delivered to the client. The information clearly reveals the location of the reef outcrop to the north and then the sandy bottom to the south. The backscatter highlights the variations in the seabed within the sand area outside of the reef.
Yacht Club Survey
Multibeam survey data can be presented in many ways. 3D contours are often a great way of presenting what is happening on the seabed. This Yacht Club survey not only reveals the depths but also the old pier alignment and extensive aquatic vegetation in the southern shallows.
In a port environment declared channel depths take utmost importance. Quite often a port will focus their attention on whether their channel is as deep as the depth it is declared. Here we can assist by streamlining our results. A Compliance Chart provides a clean interpretation of whether depths are compliant or non-compliant.