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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基于多传感器卫星水线法的快速大范围潮滩地形制图优化

潮滩是陆地-海洋界面的重要生态系统。随着滩涂生态价值的日益重视，滩涂地形图的准确性成为滩涂生态系统保护和恢复规划的基础资料。本研究提出了一种优化的基于卫星的水线方法，用于绘制韩国西海岸潮滩的地形变化。我们评估了使用多传感器卫星数据（Landsat 8/9， Sentinel-2A/B和Sentinel-1A）收集的一年时间内生成的数字高程模型（DEM）的精度和效率。根据平均绝对误差（MAE）阈值，最佳数据收集周期为5个月，因为超过5个月的收集周期不会导致DEM质量的显着改善。在5个月的数据采集周期中，Fusion DEM的MAE为25.6 cm，比Optical DEM精度提高约8.16%，比SAR DEM精度提高约49.56%。我们的方法考虑了气候影响和人类活动导致的快速环境变化，为监测重要的潮滩生态系统提供了可靠的模型。

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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.