Optimization of a multi-sensor satellite-based waterline method for rapid and extensive tidal flat topography mapping

IF 2.6 3区地球科学 Q1 MARINE & FRESHWATER BIOLOGY

Estuarine Coastal and Shelf Science Pub Date : 2025-03-04 DOI:10.1016/j.ecss.2025.109235

Jingyo Lee , Keunyong Kim , Geun-Ho Kwak , Won-Kyung Baek , Yeongjae Jang , Joo-Hyung Ryu

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引用次数: 0

Abstract

Tidal flats are crucial ecosystems at the land-ocean interface. As the ecological value of tidal flats is emphasized, there is a need for precise tidal flat topographic maps as basic data for ecosystem protection and restoration planning. This study presents an optimized satellite-based waterline method for mapping the topographic changes in tidal flats, along the west coast of South Korea. We evaluated the accuracy and efficiency of digital elevation model (DEM) generated using multi-sensor satellite data (Landsat 8/9, Sentinel-2A/B, and Sentinel-1A) collected over a one-year period. The optimal data collection period was found to be 5 months, as extending the collection period beyond this did not result in a significant improvement in DEM quality, based on the mean absolute error (MAE) threshold. At a data collection period of 5 months, the Fusion DEM had an MAE of 25.6 cm, making it approximately 8.16% more accurate than the Optical DEM and about 49.56% more accurate than the SAR DEM. Our method accounts for rapid environmental changes due to climatic effects and human activities, providing a reliable model for monitoring vital tidal-flat ecosystems.

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来源期刊

Estuarine Coastal and Shelf Science 地学-海洋学

CiteScore

5.60

自引率

7.10%

发文量

374

审稿时长

9 months

期刊介绍： Estuarine, Coastal and Shelf Science is an international multidisciplinary journal devoted to the analysis of saline water phenomena ranging from the outer edge of the continental shelf to the upper limits of the tidal zone. The journal provides a unique forum, unifying the multidisciplinary approaches to the study of the oceanography of estuaries, coastal zones, and continental shelf seas. It features original research papers, review papers and short communications treating such disciplines as zoology, botany, geology, sedimentology, physical oceanography.