Scientific Topics & Reports

ALB Effectiveness in the Aegean Sea

Function of Water Clarity 29/05/2015

An Airborne Lidar Bathymetry (ALB) system has to cope with a number of limitations. Weather conditions (rainfall, humidity and sea state), together with bottom conditions (slope of the seabed, material type, roughness and density) are of great importance. However, the factor that dominates is water clarity. The attenuation of a beam of light by water results from two independent mechanisms; scattering and absorption. Therefore, turbidity, which is controlled by rivers’ runoffs and winds, wind/wave induced sediment re-suspension, the intensity of coastal human activity, the tidal amplitude and the structure of the water column itself, have the potential to significantly influence the maximum surveyable depth.

Lt Georgios Georgopoulos,
Hellenic Navy Hydrographic Service,
Greece

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