Dredging Survey

Why do You Need a Dredging Survey?

Dredging is an essential process that Port and Harbour authorities, Marine Facility Managers and other marine stakeholders must utilise in maintaining their waterways to ensure safety of navigation. When left unmonitored, the ingress and egress of sediments can impede the safety of navigation within a waterway.  This often leads to costly dredging services being required for channels, berths and anchorages.
Total Hydrographic has been successfully responsible for providing dredging services to major port authorities such as the Victorian Regional Channel Authority’s Geelong Channels as well as local Harbour, Marina and Coastal Foreshore authorities.  The following services listed below are what Total Hydrographic can provide to you and your clients.

  • Pre, Progress, Post dredging survey services
  • 3D Channel Design Volume Calculations
  • Consultancy and project management
  • Calibration and Validation of dredge vessel positional systems
  • Delivery of XYZ dataset
  • Plan drawings in CAD and/or PDF
  • Survey report outlining survey methodology


Our involvement

Our dredging services begin with the client’s channel design requirements. Pre, Progress and Post dredge surveys provide a detailed view of the area of interest with up-to-date data depending on frequency of survey. Survey capture is performed on fully calibrated and validated bathymetric surveying systems.

If a target dredging design depth is provided, then we can analyse and compare your survey to this target depth.  This can be further refined by incorporating a custom 3D channel design that includes associated batters at a particular slope ratio.   Volume calculations can be undertaken to quantify the amount of material to be removed to achieve the target design depth.

Dredging Surveyor
Figure 1: Harbour Pre, during & post dredging survey results

Beach Renourishment

Coastal renourishment is an ongoing commitment by Coastal authorities to mitigate erosion. Seasonal variation and storm events can lead to significant losses to our Australian beach and foreshore regions. Beach renourishment projects often rely on taking material from a ‘borrow site’ located offshore and depositing the material across a beach area to a design level. These projects often require integration of both topographic and bathymetric survey systems to ensure a complete model of the beach is captured.

We can provide the following during a renourishment project:

  • Pre, Progress, Post dredging surveys
  • Volume calculations for borrow and renourishment of areas
  • Delivery of XYZ dataset
  • Interactive 3D point cloud analysis

Our services have been used during beach renourishment projects across the Melbourne Metro area and Mornington Peninsula such as St Kilda and Rosebud beach.

Beach re-nourishment
Figure 2: An example of a renourishment project in which Total Hydrographic provided dredging survey services during its progression.
Total Hydrographic’s pre and post dredging surveys are overseen by professionally recognised Level 1 and Level 2 Certified Hydrographic Surveyors, assessed by the Australasian Hydrographic Surveyors Certification Panel (AHSCP) through the Surveying & Spatial Sciences Institute. 

A list of certified professionals in hydrographic surveying can be found here.

Enlist an experienced and fully qualified hydrographic survey company for your dredging project and save on overall project costs.

We Have the Qualifications - Call us!