Suitability of GNSS for analysis of soil subsidence in Recife in a highly urbanized coastal area

Luna, Rejane Maria Rodrigues de; Garnés, Silvio Jacks dos Anjos; Cabral, Jaime Joaquim da Silva Pereira; Santos, Sylvana Melo dos

doi:10.1007/s11069-021-04513-2

Cited by 4 publications

(2 citation statements)

References 19 publications

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“…Juntas, essas abordagens podem ser utilizadas para monitorar e avaliar o potencial de desastres naturais, como terremotos, deslizamentos de terra e erosão costeira. Estudos envolvendo a integração de uma abordagem MT-InSAR com técnicas utilizando observações do GNSS podem ser destacados em Pezzo et al (2023), Kumar, Dwivedi e Martha (2022), de Luna et al (2021), Yalvac (2020), Farolfi et al (2019, Hu, Chen e Zhang (2019), , Chen et al (2017), Roque et al (2016), Hastaoglu (2016), e Komac et al (2015).…”

Section: Introductionunclassified

Emprego da Técnica PSInSAR como Ferramenta Complementar em Análise de Subsidências. Caso de Estudo: Bairro Guabirotuba – Curitiba – PR

Alves,

Dalazoana,

Krueger

et al. 2023

Rev. Bras. Cartogr.

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Para entender e monitorar adequadamente os riscos decorrentes de processos deformantes, como a subsidência, é fundamental identificá-los e avaliar sua magnitude adequadamente. O uso do GNSS é amplamente difundido para avaliar o panorama geral dessas instabilidades, seja por meio de posições absolutas ou medições contínuas dos pontos dentro das áreas afetadas. Por outro lado, a técnica interferométrica em uma abordagem multi-temporal (MT-InSAR), como a técnica PSInSAR, permite monitorar e detectar pequenas variações no terreno causadas por movimentos da superfície, como deslizamentos de terra ou subsidência. Nesse sentido, este manuscrito tem como objetivo complementar os resultados de uma análise de subsidência por meio de observações GPS realizadas em uma região do bairro Guabirotuba, em Curitiba (PR), utilizando o processamento interferométrico empregando a técnica PSInSAR com base em 77 imagens SAR do satélite Sentinel-1A, adquiridas na órbita descendente durante o período de 2016 a 2022. Os resultados revelaram que as estações da rede GPS implantada no Guabirotuba apresentaram uma velocidade extremamente lenta quando projetadas na direção da linha de visada (LoS) do satélite. A projeção na LoS dos deslocamentos relativos das coordenadas (north, east, up) e das velocidades apresentou comportamentos semelhantes e, em alguns pontos, divergentes quando comparados aos resultados obtidos com a técnica PSInSAR.

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Section: Introductionunclassified

Emprego da Técnica PSInSAR como Ferramenta Complementar em Análise de Subsidências. Caso de Estudo: Bairro Guabirotuba – Curitiba – PR

Alves,

Dalazoana,

Krueger

et al. 2023

Rev. Bras. Cartogr.

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“…The study of land subsidence due to the reduction of groundwater using a geodetic technique originates from the application of terrestrial measurement methods, such as GNSS (Romão et al, 2003;Santos et al, 2010;Santos et al, 2012;Luna et al, 2021) and precision geometric leveling (Luna et al, 2017). Among these techniques, so far, the slow sinking of soils in the southern zone is capable of being detected by geometric leveling.…”

Section: Introductionmentioning

confidence: 99%

Monitoring of land subsidence in the city of Recife/Brazil using Sentinel-1 SAR interferometry

Ruiz-Armenteros

Souza

Cabral

2022

Proceedings of the 5th Joint International Symposium on Deformation Monitoring - JISDM 2022

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One of the main causes of land subsidence in the world is the exploitation of groundwater above the regeneration capacity of the aquifer systems. However, the rapid urban growth in estuarine areas can also contribute to the development of this phenomenon. An example of this occurs in the city of Recife, northeastern Brazil. The municipality is built on an estuarine plain composed of several rivers (Capibaribe, Beberibe, Tejipió), which formation results from the occupation of humid areas and mangroves. In recent decades, the excessive removal of water resources from the subsoil has caused the reduction of more than 100 meters of the deep aquifer piezometric level in some places. The presence of these factors in Recife may contribute to land subsidence. To detect this phenomenon, the Persistent Scatterer Interferometric Synthetic Aperture Radar (PSInSAR) technique was used. The dataset consisted of 135 Sentinel-1A Interferometric Wide (IW) Single Look Complex (SLC) images from September 2016 to April 2021. The images were acquired in descending orbits and VV polarization. The results of the PSInSAR analysis reveal that in Recife there are several areas of land subsidence with a rate close to -15 mm/year. The main occurrence of soil settlement is observed in large recently built areas in the west zone, and small areas in the north zone. Minor cases occur in the southern zone due to the exploitation of groundwater. The identification of these land subsidence areas can help in the study of urban drainage to avoid flooding sites and in the adoption of mitigating measures for the suitable use of underground water resources.

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Comprehensive database of land subsidence in 143 major coastal cities around the world: overview of issues, causes, and future challenges

Pedretti,

Giarola,

Korff

et al. 2024

Front. Earth Sci.

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Subsidence refers to the gradual lowering or sudden sinking of the ground surface and is known to impact human lives in terms of damages to the infrastructures, utility lines, and buildings as well as changes in the surficial drainage systems and groundwater conditions. The impacts of land subsidence will be greater in the future, considering the sea level rise, population growth, intensification of coastal erosion and extreme events, as well as increase in flood risk or freshwater salinization, mostly in coastal cities. The main aim of this work is to provide an open-source, peer-reviewed, and comprehensive database identifying the main and secondary causes of land subsidence in 143 coastal cities. We highlight the potential impacts of subsidence that are still unknown in some at-risk cities and non-existence of mitigation measures. The database additionally shows that mitigation measures, specifically those addressing subsidence due to groundwater extraction, have proven successful in the past. The proposed database aims to increase the knowledge on the subsidence phenomenon and also global awareness of land subsidence issues among researchers, the scientific community, stakeholders, and policymakers in terms of urban planning and development.

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Suitability of GNSS for analysis of soil subsidence in Recife in a highly urbanized coastal area

Cited by 4 publications

References 19 publications

Emprego da Técnica PSInSAR como Ferramenta Complementar em Análise de Subsidências. Caso de Estudo: Bairro Guabirotuba – Curitiba – PR

Emprego da Técnica PSInSAR como Ferramenta Complementar em Análise de Subsidências. Caso de Estudo: Bairro Guabirotuba – Curitiba – PR

Monitoring of land subsidence in the city of Recife/Brazil using Sentinel-1 SAR interferometry

Comprehensive database of land subsidence in 143 major coastal cities around the world: overview of issues, causes, and future challenges

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