UAV multispectral images for bathymetry estimation

Lorenzo Rossi, Irene Mammi, Filippo Pelliccia

Abstract

Bathymetric data are commonly used for coastal erosion monitoring and engineering projects. Multispectral satellite imagery is nowadays commonly applied to derive bathymetry with different literature algorithms. The present study shows the results of a Unmanned Aerial Vehicle (UAV), also known as drone, derived bathymetry (UDB) equipped with a multispectral camera acquiring in the same WorldView-2 sensors spectral bands. An hydrographic Multibeam Echosounder (MbEs) survey was performed in the same period in order to validate the method accuracy. The study area is approximately 0.5 km2 and located in Tuscany (Italy). Because of the high percentage of water in the images, an alternative method was also implemented for producing a georeferenced orthophoto mosaic. Multispectral images were processed to retrieve bathymetric data with Stumpf and Lyzenga algorithms. Results show the possibility to produce accurate UDB in shallow waters with low operational costs and the capability to obtain a full sea-floor coverage where MbEs is usually unable to work properly.

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IMEKO-TC19-METROSEA-2019-23.pdf

DOI

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IMEKO TC

TC19 - Environmental Measurements

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