Assessment of empirical algorithms for bathymetry extraction using Sentinel-2 data

A - Papers appearing in refereed journals

Casal, G., Monteys, X., Hedley, J., Harris, P., Cahalane, C. and McCarthy, T. 2019. Assessment of empirical algorithms for bathymetry extraction using Sentinel-2 data. International Journal Of Remote Sensing.

AuthorsCasal, G., Monteys, X., Hedley, J., Harris, P., Cahalane, C. and McCarthy, T.
Abstract

Bathymetry estimated from optical satellite imagery has been increasingly implemented as an alternative to traditional bathymetric survey techniques. The availability of new sensors such as Sentinel-2 with improved spatial and temporal resolution, in comparison with previous optical sensors, offers innovative capabilities for bathymetry derivation. This study presents an assessment of the fit between satellite data and the underlying models in the most widely used empirical algorithms: the linear band model and the log-transformed band ratio model using Sentinel-2A data. Both models were tested in two study areas of the Irish coast with different morphological and environmental conditions. Results showed that the linear band model fitted better than the log-transformed band ratio model providing coefficient of determination values, R2, between 0.83 and 0.88 (0 m–10 m) for the five images considered in the study. The closest fit was found in the depth range 2 m–6 m. Atmospheric correction, bottom type influence, and water column conditions proved to be key factors in the bathymetric derivation using these satellite datasets.

Keywordsbathymetry; empirical algorithm; atmospheric correction; coastal applications
Year of Publication2019
JournalInternational Journal Of Remote Sensing
Digital Object Identifier (DOI)doi:10.1080/01431161.2018.1533660
Open accessPublished as non-open access
Funder project or code2016-PD-005
FunderGeological Survey Ireland
Output statusPublished
Publication dates
Online22 Oct 2018
Publication process dates
Accepted11 Aug 2018
PublisherTAYLOR & FRANCIS LTD
Copyright licensePublisher copyright
ISSN0143-1161

Permalink - https://repository.rothamsted.ac.uk/item/84qz0/assessment-of-empirical-algorithms-for-bathymetry-extraction-using-sentinel-2-data

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Under embargo until 22 Oct 2019

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