Low-cost mapping of coastal geomorphology by remote sensing in Angels Cove, Arraial do Cabo, Brazil

IF 0.5 Q4 GEOGRAPHY, PHYSICAL

Revista Brasileira de Geomorfologia Pub Date : 2023-12-09 DOI:10.20502/rbgeomorfologia.v24i4.2416

Ruan Vargas, Julio Cesar de Faria Alvin Wasserman, Camila Américo dos Santos, Agenor Cunha da Silva, Fábio Ferreira Dias

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引用次数: 0

Abstract

Bathymetry is a crucial information for understanding coastal geomorphological processes. This study aims to evaluate the applicability of Satellite-Derived Bathymetry (SDB) as a low-cost alternative for coastal geomorphological mapping in Angels Cove. Sentinel-2B images were used for generation of SDBs of coastal environments by two empirical methodologies. Depths were measured in situ by echo sounding for calibration and validation of the models. The models of Angels Beach calibrated with 100% and 50% of the control points were evaluated for cost and time reduction. All SDBs of Angels Beach presented similar geomorphological features and statistics results, with correlations of r ≅ 0.94 both in calibration and validation. When considering half of the control points for model calibration, the total cost for the mapping is estimated to reduce by approximately 50%. A SDB of a submerged sandbar was also mapped with a correlation of r ≅ 0.98 with depth field data. SDB can be used for a quick and low-cost assessment of the geomorphology in Angels Cove. New SDB models can be evaluated from higher spatial resolution satellites to reduce errors.

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利用遥感技术在巴西 Arraial do Cabo 的天使湾绘制低成本海岸地貌图

水深测量是了解沿岸地貌过程的重要信息。本研究旨在评估卫星衍生水深测量法（SDB）作为一种低成本的海岸地貌测绘方法在天使湾的适用性。采用两种经验方法，利用哨兵-2B 图像生成沿岸环境的 SDB。通过回声测深对深度进行了实地测量，以校准和验证模型。对用 100%和 50%的控制点校准的天使湾模型进行了评估，以减少成本和时间。天使海滩的所有 SDB 都呈现出相似的地貌特征和统计结果，校准和验证的相关性均达 r ≅ 0.94。如果将一半的控制点用于模型校准，测绘总成本估计可降低约 50%。还绘制了一个淹没沙洲的 SDB，其与深度场数据的相关性为 r ≅ 0.98。SDB 可用于对天使湾的地貌进行快速、低成本的评估。可利用空间分辨率更高的卫星对新的 SDB 模型进行评估，以减少误差。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Revista Brasileira de Geomorfologia GEOGRAPHY, PHYSICAL-

CiteScore

1.30

自引率

40.00%

发文量

审稿时长

16 weeks

期刊介绍： The Revista Brasileira de Geomorfologia are focused on research, analysis and application of knowledge for the development of models of large sets of relief; fluvial dynamics; the processes of aspects, such as erosion and mass movements and their impact; survey, assessment and recovery of degraded areas; surveys and assessments of natural resources; thematic mapping and integrated relief; environmental zoning; among other relevant aspects of the land relief on any scale. From a technical and instrumental basis for the development of these studies, studies that use instruments to the survey, the interpretation and generalization of data on various aspects of the Earth''s surface, including the forms of occupation and use (s) company (s) human (s). As well as the use and integration of methods and techniques that enable geo technical and instrumental character important in scientific production and the definition of public policies.