A decade-long silent ground subsidence hazard culminating in a metropolitan disaster in Maceió, Brazil

Abstract Ground subsidence caused by natural or anthropogenic processes affects major urban areas worldwide. Sinkhole formation and infrastructure fractures have intensified in the federal capital of Maceió (Alagoas, Brazil) since early 2018, forcing authorities to relocate affected residents and pl...

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Autores principales:	Magdalena Vassileva, Djamil Al-Halbouni, Mahdi Motagh, Thomas R. Walter, Torsten Dahm, Hans-Ulrich Wetzel
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/5fcb96d532704a48a41a91739ebc3768
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spelling	oai:doaj.org-article:5fcb96d532704a48a41a91739ebc37682021-12-02T18:15:24ZA decade-long silent ground subsidence hazard culminating in a metropolitan disaster in Maceió, Brazil10.1038/s41598-021-87033-02045-2322https://doaj.org/article/5fcb96d532704a48a41a91739ebc37682021-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-87033-0https://doaj.org/toc/2045-2322Abstract Ground subsidence caused by natural or anthropogenic processes affects major urban areas worldwide. Sinkhole formation and infrastructure fractures have intensified in the federal capital of Maceió (Alagoas, Brazil) since early 2018, forcing authorities to relocate affected residents and place buildings under demolition. In this study, we present a 16-year history (2004–2020) of surface displacement, which shows precursory deformations in 2004–2005, reaching a maximum cumulative subsidence of approximately 200 cm near the Mundaú Lagoon coast in November 2020. By integrating the displacement observations with numerical source modelling, we suggest that extensive subsidence can be primarily associated with the removal of localized, deep-seated material at the location and depth where salt is mined. We discuss the accelerating subsidence rates, influence of severe precipitation events on the aforementioned geological instability, and related hazards. This study suggests that feedback destabilization mechanisms may arise in evaporite systems due to anthropogenic activities, fostering enhanced and complex superficial ground deformation.Magdalena VassilevaDjamil Al-HalbouniMahdi MotaghThomas R. WalterTorsten DahmHans-Ulrich WetzelNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Magdalena Vassileva Djamil Al-Halbouni Mahdi Motagh Thomas R. Walter Torsten Dahm Hans-Ulrich Wetzel A decade-long silent ground subsidence hazard culminating in a metropolitan disaster in Maceió, Brazil
description	Abstract Ground subsidence caused by natural or anthropogenic processes affects major urban areas worldwide. Sinkhole formation and infrastructure fractures have intensified in the federal capital of Maceió (Alagoas, Brazil) since early 2018, forcing authorities to relocate affected residents and place buildings under demolition. In this study, we present a 16-year history (2004–2020) of surface displacement, which shows precursory deformations in 2004–2005, reaching a maximum cumulative subsidence of approximately 200 cm near the Mundaú Lagoon coast in November 2020. By integrating the displacement observations with numerical source modelling, we suggest that extensive subsidence can be primarily associated with the removal of localized, deep-seated material at the location and depth where salt is mined. We discuss the accelerating subsidence rates, influence of severe precipitation events on the aforementioned geological instability, and related hazards. This study suggests that feedback destabilization mechanisms may arise in evaporite systems due to anthropogenic activities, fostering enhanced and complex superficial ground deformation.
format	article
author	Magdalena Vassileva Djamil Al-Halbouni Mahdi Motagh Thomas R. Walter Torsten Dahm Hans-Ulrich Wetzel
author_facet	Magdalena Vassileva Djamil Al-Halbouni Mahdi Motagh Thomas R. Walter Torsten Dahm Hans-Ulrich Wetzel
author_sort	Magdalena Vassileva
title	A decade-long silent ground subsidence hazard culminating in a metropolitan disaster in Maceió, Brazil
title_short	A decade-long silent ground subsidence hazard culminating in a metropolitan disaster in Maceió, Brazil
title_full	A decade-long silent ground subsidence hazard culminating in a metropolitan disaster in Maceió, Brazil
title_fullStr	A decade-long silent ground subsidence hazard culminating in a metropolitan disaster in Maceió, Brazil
title_full_unstemmed	A decade-long silent ground subsidence hazard culminating in a metropolitan disaster in Maceió, Brazil
title_sort	decade-long silent ground subsidence hazard culminating in a metropolitan disaster in maceió, brazil
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/5fcb96d532704a48a41a91739ebc3768
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A decade-long silent ground subsidence hazard culminating in a metropolitan disaster in Maceió, Brazil

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