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Proceedings Paper

Retrieval of nearshore bathymetry in the Gulf of Chania, NW Crete, Greece, from WorldWiew-2 multispectral imagery
Author(s): Paraskevi Drakopoulou; Vasilis Kapsimalis; Issaak Parcharidis; Kosmas Pavlopoulos
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Paper Abstract

Shallow water bathymetry is recognized as one of the most fundamental topics in environmental studies, seabed morphology research and management of the coastal zone. The detailed mapping as well as the long-term monitoring of the changes in shallow marine relief is important for the successful completion of coastal construction and environmental projects. In recent years, optical satellite imagery is proving to be a useful tool to determine coastal bathymetry, as it provides a time- and cost- effective solution to water depths estimation. In this paper, the two most popular and successful approaches for bathymetry retrieval, the Lyzenga (1985) linear bathymetry model and the Stumpf et al. (2003) ratio method, have been applied to Worldview-2 satellite imagery, in order to derive the more accurate bathymetric model for the shallow-water region of the Chania Gulf, located in NW Crete Island, Greece. This area is sea-grass free and is dominated by sandy substrate with a few rocky outcrops. The models are implemented over the total study area - no separation in subareas according to the bottom type. The results are compared with echo sounding ground truth depth data. The outcomes of the statistical analysis indicate that the linear model provides increased accuracy than the ratio one over the sandy bottom. On the contrary, in those parts covered by rocky bottoms, none of the two models provided satisfactory results.

Paper Details

Date Published: 6 August 2018
PDF: 10 pages
Proc. SPIE 10773, Sixth International Conference on Remote Sensing and Geoinformation of the Environment (RSCy2018), 107730W (6 August 2018); doi: 10.1117/12.2326189
Show Author Affiliations
Paraskevi Drakopoulou, Hellenic Ctr. for Marine Research (Greece)
Harokopio Univ. (Greece)
Vasilis Kapsimalis, Hellenic Ctr. for Marine Research (Greece)
Issaak Parcharidis, Harokopio Univ. (Greece)
Kosmas Pavlopoulos, Paris-Sorbonne Univ. Abu Dhabi (United Arab Emirates)

Published in SPIE Proceedings Vol. 10773:
Sixth International Conference on Remote Sensing and Geoinformation of the Environment (RSCy2018)
Kyriacos Themistocleous; Giorgos Papadavid; Silas Michaelides; Vincent Ambrosia; Diofantos G. Hadjimitsis, Editor(s)

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