Civil engineering & port development

Maritime field studies are an investment that multiplies savings

Whether it concerns the creation of new quays and marinas or the extension of existing installations, Deparentis supports the design offices from the very beginning of the project definition. We then propose services adapted to the budgets of the feasibility studies which are often limited, before further in-depth surveys.

Our job is to work together on the best cost-benefit solutions.

The objective is of course to assist the design office to validate the technical specifications of the work and to dimension it.

But we must also collect and deliver the essential information to enable construction companies to bid for the work accurately. The better the scope of the project is defined and the companies informed, the more competitive the offers are.

Coastal protection

The fight against coastal erosion is a major challenge of this century

It is a global issue that has an impact that we are experiencing at the scale of our country, our region.

It is therefore natural for local companies to take up the matter. By taking advantage of its geographical proximity, Deparentis provides observations and measurements to specialized offices to monitor erosion on african coasts.

To control coastal erosion, it is sometimes possible to carry out reclamation work on the shoreline by feeding in sand, which is generally collected offshore by dredging. Our work then consists in finding the resources in the required quantities and quality. To achieve this, we use sub bottom profiler sounder supplemented by hydraulic jetting, as well as laboratory analyses to determine the quality of the materials.


Waterways and ports are strategic for development and the economy of a region

To sustain good navigation and operating conditions, regular dredging of existing canals and ports is essential. We regularly monitor these conditions, and when dredging work is undertaken, to assist the control offices in measuring the volumes excavated by the contractors. In this case, our hydrographers make an assessment of the site before and after (IN and OUT bathymetric survey), as well as continuous monitoring to verify the progress of the work.

Dredging companies are paid by quantity, mainly by the cubic metre. It is therefore important to entrust the control of these volumes by bathymetry to third party companies. For new projects, for which soil conditions are not known, we provide complementary geotechnical studies to determine the hardness of the soil and mitigate the risk of invisible obstructions by sonar and magnetometer.

We may also carry out environmental impact studies for dredging and sludge disposal areas, such as toxicology analyses. In addition to these studies, Deparentis also offers safety services for dredging sites and control of dredging vessels.

Safety is implemented by means of virtual beaconing by AIS emulation, which makes it possible to simulate the presence of maritime buoys and inform the surrounding vessels of the presence of the work. We can also monitor and record the movement of dredges vessels 24 hours a day to ensure that the designated dumping areas are respected.

For more information see AssetMonitor and Guardian: Mark.

Dams & river facilities

Our missions also extend from one banks to the other, forme the source to the river mouth.

The inland waters environment are exposed to a wide variety of changing parameters: altitude, alternation of wet and dry seasons, flow regulation structures, currents, tides and saltwater upwelling near the river mouths, plant invasion, unstable bank geometry, etc…

These conditions require the greatest rigour in the methodological approach for our hydrographic surveys.

In addition, lakes and rivers are strewn with dams, hydroelectric plants, floodgates and wharves.
And hence, we also put our expertise in the inspection of these structures.

At the foot of these, we can check for the existence of scouring, or the accumulation of sediments using a sonar.

For rockfill dikes, we can check the shell blocks by means of echo-sounder and LiDAR to deliver a 3D image of the structure both underwater and out of the water.

Finally, we can mobilize UAVs and photogrammetric scanners to inspect dam facings, and reproduce the situation with a high degree of localization and measurement accuracy.