Researchers Use Sonar to Map Potential Restoration Sites

Across the Great Lakes several efforts have been undertaken to restore historic rocks reefs providing improved spawning grounds for a variety of fish species.

Projects in the St. Clair-Detroit River System, Grand Traverse Bay and Thunder Bay have restored reef spawning habitat for lake trout, walleye, whitefish and lake sturgeon.

Michigan Sea Grant and Michigan State University Extension played a role in a number of these reef restoration projects.

New research is currently paving the way for a similar reef restoration effort in Saginaw Bay. Part of this research requires understanding the current state of historic reef sites in the inner Saginaw Bay including assessing conditions on the lake bottom.

In order to lay the groundwork for future effective reef restoration efforts, researchers need to understand how much hard or rocky substrate currently exists at potential and historic reef sites. To do this they use a special technology called side scan sonar.

Scientists from the Michigan Department of Natural Resources Alpena Fisheries Research Station used side scan sonar to develop images of lake bottom conditions at two potential reef restoration sites in Saginaw Bay as well as two sites where the remnants of historic rock reefs can be found.

Their research produced detailed maps of substrate conditions that will provide valuable information for future reef restoration efforts.

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3rd International Congress Hydraulic Engineering Structures and Dredging

Russia’s leading maritime industry Media Group PortNews ( holds a traditional annual Congress “Hydraulic Engineering Structures and Dredging” in Moscow. 

The two-day Congress includes the 7th International Forum of Dredging Companies and the 3rd Technical Conference “Modern Solutions for Hydraulic Engineering”.

Infrastructure development is among the real sources of Russia’s economy growth. Construction of port facilities and new hydraulic engineering structures on the country’s inland waterways constitute an essential part of all infrastructure projects. It is important to take into account the best international practices to implement these projects effectively.

The program of the Congress will be devoted to the latest technologies for dredging and hydraulic engineering works. Speakers and delegates will refer to real projects to discuss specifics features of dredging works, as well as dedicated fleet and equipment involved.

To learn more about event, please, contact the organizing committee:

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Dredging jobs in Abu Dhabi at NMDC

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