Survey Consultancy

Hydrographic and geophysical survey

Acoustic measurements provide a clear sea- or riverbed view, but do not visualize the soil structure and sediment layers. Measurements of the underwater sediment and mud layers can improve the echo sounder and multibeam data and result in a high accurate depth analyses. It is possible to precisely determine the characteristics of the fluid layers above the hard bottom. Density, turbidity and sediment strength are parameters that will ensure a correct picture of the soil structure.
The GraviProbe and DensX system are the perfect tools to accurately measure the density or rheological levels.
For more information on the applications: technical papers

Environmental

Contaminated soil and sediments are hazardous for the entire marine environment when conducting construction or dredging works. Defining the sensitive areas allows to effectively remove contaminated sediment and enhances operating according to environmental regulations and standards.
Studying marine life and ecosystems is a basic element to improve nature conversation. Determining sediment movements in ecosystems can help to create new insights in underwater soil behavior to establish processes to protect the environment.
With the dotOcean GraviProbe and DensX system it is possible to accurately determine the characteristics of the fluid layers to indicate the contaminated levels.

Measurement data acquisition

The dotOcean Atlantis platform makes it possible to collect all output data of sensors and measurement systems with an accurate timestamp. The system increases the usability of onboard data in a cost efficient way. Online and real time streaming to network and visualization equipment, data management and system management is synthesized in a fast and easy to use system.
Acoustic measurement systems, position sensors (GPS, compass), weather data, mechanical measurements, detection sensors are parameters easily processed and visualized in an integrated way by Atlantis.

Dredging preparation and evaluation

In the preparation of dredging projects, the sediment layers, depths, thickness and characteristics are important to estimate the dredging effort and power.

Ton Dry Weight

An important aspect to be monitored during maintenance and capital dredging works is the dredging volume and dredging mass. The latter is expressed in ‘Ton Dry Weight (TDS)’. The volume and weight of the layer to be dredged helps to estimate the work load based on the capacity of the dredger. Acoustic methods can be complementary to determine the volume but do not give insight in the total weight of the layers to be dredged. The DensX can provide a very high accurate density profile of the underwater sediment layer. Based on this profile the Ton Dry Weight of the layer is visualized by the software.

Bed erosion and turbidity

With the dotOcean GraviProbe and DensX system it is possible to accurately determine the characteristics of the fluid layers above the hard bottom. Density, turbidity and sediment consolidation are parameters that will ensure a correct picture of the soil erosion & erosion capabilities and allow to support sediment transport studies.

Soil classification

The GraviProbe gives a sediment layer strength and soil classification. It is easy to find the interface mud/sand or mud/clay or mud/rock. Based on these inputs the type of dredging equipment can be selected and planned.

Water injection dredging

To estimate a water injection dredging process the density measurement indicates how much water needs to be injected to reach a liquefaction point and the soil strength measurements indicate how deep the water beam will inject into the soil.

For more information on the applications: technical papers

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