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Dredging

Rotterdam Reduces Dredging Requirement

The Port of Rotterdam has awarded a contract to Stema Survey to deliver and implement the Silas acoustic data acquisition and processing system in combination with an OEM Odom Echotrac CV echo sounder for the purpose of monitoring siltation within the port. The equipment was ordered after the port’s hydrographic survey department tested the latest version of Silas, which includes real time density information.

How a silt layer is built up.
How a silt layer is built up.

Port surveyors and dredging contractors use Silas to obtain information about water depth, silt layers and sub-bottom characteristics. Sediment layers and quantities as well as type (including polluted layers) and obstacles in the bottom can be determined.

The Odom Echotrac CV provides optimal integration with the Silas software system, allowing for a versatile range of operations to be performed, from a nautical depth survey to seabed classification. The integrated system offers the functionality of a digital sub-bottom profiler as well as an echo sounder, providing all the information needed to conduct maintenance and capital dredging operations.

Unlike more traditional systems, this package can detect and display areas of fluid silt through which ships can manoeuvre safely. It presents a picture showing how a silt layer is built up. A red line shows the nautical depth level at which ships can no longer manoeuvre. The unique blue line indicates the top of the silt. Ships can manoeuvre through areas indicated between the two lines, which means the total amount of dredging required, and resulting cost, can be reduced considerably.

MJ Information No: 22415

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How a silt layer is built up.

All images copyright © Mercator Media 2008

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