Affiliated Researchers was contracted to collect sub-bottom profiling data at the Straits of Mackinaw, Michigan.  Specializing in environmental mapping, reporting, and technology, Affiliated Researchers utilizes advanced geophysical instruments and software to provide sub-bottom profiling of lakes, harbors, rivers, canals, estuaries, and marine environments.

Sub-bottom profiling is the preferred method to map underwater stratigraphy, and accurately measure the depth and thickness of substrates and accumulated sediments.

Sub-bottom profiling is useful for:

  • pre-dredge surveys of accumulated sediments;
  • geological surveys of glacial till and substrates;
  • development of a groundwater transport model;
  • locating buried wrecks, debris, and obstructions;
  • locating buried pipelines or cables; and,
  • archeological surveys for buried artifacts.

Affiliated Researchers has a great deal of real-world experience with sub-bottom profiling; under various site conditions and at numerous project locations.

Using its real-world experience, Affiliated Researchers selected its Innomar SES 2000 sub-bottom profiling equipment the most capable sub-bottom profiler to provide the best deliverables based upon water depths and substrate conditions.

The Innomar SES 2000 operates at low frequencies and provides up to 40 meters of penetration with a layer resolution of 5cm.

With the sub-bottom profiler deployed from its survey vessel, Affiliated Researchers navigated established survey transects lines that were displayed on the onboard hydrographic computer.   GPS-referenced geophysical data were collected utilizing the sub-bottom profiler, HYPACK hydrographic software, Trimble RTK-GPS survey equipment, and the onboard Toughbook computer.

Affiliated Researchers compiled and analyzed the echogram imaging collected with the sub-bottom profiler in accordance with recognized protocol.  Geophysical software was used to compile the data into accurate drawings measuring the thickness and depths of the various sediment layers.  Accurate 3-D graphics were developed to allow user-controlled analysis of the stratigraphy.