Our certified hydrographic surveyors have nearly 40 years’ experience in bathymetric survey; we are specialists in this niche industry. This accreditation and experience translates to a smoother experience for our clients. We work with you to understand what your expectations are and what you need. Tell us your requirements and we will put together a proposal to deliver what you need quickly, efficiently and accurately.
Who Needs a Bathymetric Survey?
Essentially anyone responsible for a body of water. To efficiently, safely and effectively manage the area you need the information relating to depth, hazards, capacity, vegetation and sediment. We will present you with the information relevant to your body of water in an easily accessible, easy to use and easy to share format.
What is a Bathymetric Survey?
A bathymetric survey is an observation of the underwater depth of a body of water. Put simply, bathymetry is the equivalent of underwater topography. Bathymetric surveys can be undertaken using either a Single Beam Echo Sounder (SBES) or a Multibeam Echo Sounder (MBES). Both types of bathymetric survey equipment use the same principle of measuring the travel time of sound through water.
Single Beam vs Multibeam
After surveying the same survey extents with an SBES and then an MBES, the end result of the two products can be seen in the images below:
SBES has gaps in the model and requires interpolation. MBES has full seafloor ensonification with no gaps and no requirement to interpolate.
Single Beam Echo Sounders (SBES) utilises one single sonar beam to measure the depth of water and is the more efficient solution for shallow water bathymetric surveys. Multibeam Echo Sounders (MBES) utilise an array of sonar beams to scan a swath of the bottom. A MBES system is most efficient in deeper water and can provide full seafloor coverage. These scans show a MBES and a SBES survey of the same area. It’s obvious that the MBES solution captures full bottom coverage and reveals greater detail of the features.
Although MBES produces a superior result, SBES has its advantages when it comes to shallow water. MBES achieves a swath coverage that is relative to the depth of water being surveyed whereas single beam generally achieves the same coverage regardless of the depth of water. So, in water depths of less than 4m, it can be more efficient and cost effective to mobilise a SBES system. When a high-resolution survey is required in depths of water greater than 5m, the efficiency of the MBES system quickly exceeds the SBES solution.
Providing clients with the best possible solutions for bathymetric surveying using SBES and MBES is the emphasis of our company. Only by acquiring superior data can our skilled staff create the highest quality bathymetric maps and reports.
Total Hydrographic’s bathymetric surveys are conducted exclusively 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. Our staff have tertiary qualifications and experience in Hydrographic Surveying, Geomatic Engineering, Marine Mapping and GIS, Cartography and National Maritime Operations.
A list of certified professionals in hydrographic surveying can be found here.
Protect the integrity of your project by ensuring that you are working with certified bathymetric surveying professionals!