Bathymetry in Abu Musā Island Using Remote Sensing Techniques

Document Type : Original Article

Authors

1 Assistant Professor, Department of Environmental Science, Natural Resources Faculty, Lorestan ‎University, Khorramabad, Iran.

2 Ph.D. student of oceanography, Researcher of the Department of Environmental Geography Studies, Madde ‎Danesh Studies Center‎, Tehran, Iran.

10.22124/gscaj.2025.26528.1288

Abstract

Bathymetry is particular important for managing and monitoring coastal islands and preparing accurate maps and information about these shallow areas. In this regard, bathymetry using satellite imagery has provided a broad perspective in shallow coastal areas due to its high efficiency and low cost. Therefore, in the present study, an experimental bathymetry study of Abu Musā island was conducted with the aim of obtaining more information about the phenomena and features of shallow water areas using Sentinel-2 images and the Google Earth Engine (GEE) web platform. Additionally, pre-processing was also carried out to remove the effects of surface reflection for accurate bathymetry estimation in two time periods, tidal and non-tidal, in comparison with the ICZM project data. According to the results, in Abou Musā Island, the classification of bathymetric points during tidal conditions had correlation coefficients and errors of R2 = 0.96 and RMSE = 1.11, and outside the low tide, R2 = 0.74 and RMSE = 2.3. The obtained results indicated that the bathymetric accuracy has decreased due to tidal effects in this island. This means that due to the shallow water column in the intertidal areas, the relationship between the logarithm ratio and water depth cannot be properly evaluated, because there is not enough correlation between the data used to define the logarithm/depth relationship, which results in a decrease in the correlation coefficient between the green/blue band ratio and water depth in the intertidal area (during the calibration of the experimental bathymetric technique). Furthermore, the validation results of the measured depth points and the estimated depth points showed that there is a high correlation between these points. These results indicated the high accuracy of the Sentinel-2 satellite images and the pre-processing set performed in the experimental bathymetry process in shallow coastal areas. Therefore, this technique can be used as an efficient method in the bathymetry process in other target islands and shallow coastal areas.

Highlights

- Bathymetry using satellite imagery has provided a broad perspective in shallow coastal areas due to its high efficiency and low cost.

- Experimental bathymetry is an efficient method that can also be utilized in the bathymetric process for other islands and shallow coastal areas.

Keywords

Main Subjects

References

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