Keeping free navigable channels or reclaiming land requires dredging and the deposition of sand. Protecting nearby coral reefs is more than challenging. By continuous dredge monitoring we enabled the company Van Oord to better manage their dredging operations. For this purpose we have used Sentinel-2-imagery to create hydrographic charts of the sea depth and seafloor classification maps. By using EO map’s services, Van Oord benefits from reduced costs while better knowledge of the seabed controls damages to the environment.

The Maldives comprise over 1000 islands sitting on either coral structures or sandbars. Offshore, there are many further reefs sitting just under the surface. The low-lying islands are very vulnerable to damage from rising sea-levels and increases in the frequency of storms. Separated by navigable channels, the atolls are subject to change as currents erode or deposit sand. There is a constant need for either keeping channels free or the depositing of sand. For coastal protection often sand is obtained by dredging the sea-floor. Hence, up to date maps of the sea-floor are valued to help know where the sand can be found and extracted with good operational efficiency, whilst avoiding the destruction of coral reefs or disturbing important sea vegetation. The maps also help to navigate the ships with the knowledge of where they can move safely.

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