Short-time analysis of shoreline based on RapidEye satellite images in the terminal area of Pecém Port, Ceará, Brazil

Abstract

Coastal environments are highly dynamic and sensitive to interference and variations caused by the numerous natural and anthropogenic agents. The northern coast of Northeastern Brazil has undergone intense erosion in recent years. However, the construction of the Pecém Port modified the beach and shoreline features differently from the adjacent areas. This article describes using remote-sensing images integrated with a Geographic Information System to evaluate the sedimentary balance and morphological changes observed in the sandy beach area that was affected by the construction of Pecém Port. Two methods were applied to the RapidEye images to quantify the short-time changes that occurred on the coast. The Digital Shoreline Analysis System method showed that the beach width increased west to the port, which was calculated by the Change Polygon Approach determined by intersecting and uniting polygons to estimate the difference between the areas over time. The short-time analysis results showed changing coastal morphology, demonstrating that the anthropic interventions in the region are transforming significantly the natural elements that make up the region landscape. Between 2011 and 2014, the investigated beach stretch of approximately 3 km suffered an accretion process of more than 102,000 m 2 over 3 years. The high spatial resolution of satellite images, digital processing imaging techniques and geostatistical methods were effective in this study, allowing understanding the recent changes in the area.

Primary drivers of multidecadal spatial and temporal patterns of shoreline change derived from optical satellite imagery

“…Free-of-charge publicly available optical satellite imagery can now be used to provide short-term to multi-decadal shoreline data from the local to the global scale using different techniques (e.g. Liu et al, 2017;Duarte et al, 2018;Toure et al, 2019;Sánchez-García et al, 2020;Bishop-Taylor et al, 2021). On microtidal beaches, satellite-derived shoreline (SDS) errors are typically under 10 m (e.g.…”

A review and meta-analysis of remote sensing data, GIS methods, materials and indices used for monitoring the coastline evolution over the last twenty years

“…QuickBird has been used by Almonacid-Caballer et al (Jaime et al, 2016); Andredaki et al (2014); Mann and Westphal ; Da Guia ; Ford (Murray, 2013) and Faik et al (2008). RapidEye has been used by Duarte et al (2018). Corona has been used by Annibale et al (Annibale Guariglia et al, 2009) and Bulent et al (2004) and Pleiades has been used by Pantanahiran (2019).…”

“…Furthermore, SPOT images have been used by Valderrama- Landeros and Flores-de-santiago ( 2019 (Cooley Paul & Barber David, 2003). Rapid-eye has been used by Duarte et al (2018). Some indicative relative studies which have used medium-resolution data are presented in the next paragraph.…”

“…An estimation in coastal equilibrium made by Weicheng ( 2007) using multitemporal Satellite SPOT images. Duarte et al (2018) used Rapid-eye imagery to evaluate the morphological changes observed in a beach in Brazil. Indian high-resolution satellites, such as IRS 1 C/1D and IRS (Pan) have been used by Mujabar et al (Sheik & Chandrasekar, 2013) IRS 1 C/1D; Rasuly et al (Aliakbar et al, 2010), 2002.…”

Geotecnologias na análise da dinâmica costeira do estuário do Rio Caeté – Pará l (Edição 530)

“…Em produtos de sensoriamento remoto para determinação da linha de costa, pode-se basear através do limite existente entre a praia alta ("praia-verdadeira") e a vegetação dunar ou mangue, sendo este um dos principais indicadores proposto por Boak e Turner (2005), pois é o limite de mais fácil identificação nas fotografias e responde bem à evolução de médio termo ou curto período (DUARTE et al, 2018). Os melhores resultados são encontrados com produtos de altíssima resolução espacial (SEKOVSKI et al, 2014).…”