Morphometric Changes between Peroba and Redonda Beaches, Icapuí-Ceará Region, Brazil, Applying High Resolution Remotely Piloted Aircraft Images from 2020 to 2021

IF 0.5 Q4 GEOGRAPHY, PHYSICAL Revista Brasileira de Geomorfologia Pub Date : 2023-10-30 DOI:10.20502/rbgeomorfologia.v24i4.2331

Mário Silva Chacanza, Narelle Maia de Almeida, George Satander Sá Freire, Cláudio Ângelo da Silva Neto, Matheus Edson Mendes Medeiros, João Capistrano de Abreu Neto

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Abstract

Beaches are regions of the coastal zone where the effects of interaction between marine, terrestrial and atmospheric ecosystems are often seen. Natural and anthropic agents act together in coastal processes, which may result in erosion or accretion. If the erosion is intense and continuous, it will represent a severe problem, especially in densely occupied and economically significant beaches, such as the beaches of Peroba and Redonda that have registered erosive events. Thus, this work aimed to analyze the variation of the coastline and the volume of beach sediments through a historical series of one year employing a remotely piloted aircraft, conjugated with the analysis of sediments collected in fields. At Peroba beach, the shoreline was stable, having varied by about 0,87 m/year, and the volume indicated a positive sediment balance of about 18.815 m3. At Redonda beach, the coastline degraded by about 1,27 m/year. The volume indicated a negative sediment balance of -1.230 m3. The beaches were mainly characterized by sediments of very fine and fine sand fractions. The volume variation indicated similar trends to the shoreline, with more significant deposition in the west and erosion in the east.

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巴西Icapuí-Ceará地区Peroba和Redonda海滩之间的形态变化，应用2020 - 2021年高分辨率遥控飞机图像

海滩是海岸带的区域，在那里经常可以看到海洋、陆地和大气生态系统之间相互作用的影响。自然因素和人为因素在海岸过程中共同作用，可能导致侵蚀或增生。如果侵蚀是强烈和持续的，这将是一个严重的问题，特别是在人口密集和经济意义重大的海滩，如Peroba和Redonda的海滩，已经发生了侵蚀事件。因此，这项工作旨在利用遥控飞机，结合野外收集的沉积物分析，通过一年的历史序列来分析海岸线和海滩沉积物的体积的变化。在Peroba海滩，海岸线稳定，变化幅度约为0.87 m/年，体积表明泥沙正平衡约为18.815 m3。在Redonda海滩，海岸线以每年约1,27米的速度退化。体积显示负泥沙平衡为-1.230 m3。滩涂以极细砂和细砂组分为主。体积变化趋势与海岸线相似，西部沉积明显，东部侵蚀明显。

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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.