What question did this study set out to answer?

To assess and characterize urban subsidence in Maceió, Brazil, from 2016 to 2024.

December 9, 2025Remote SensingOpen Access

Beyond Salt Mining: Urban Subsidence Hotspots Characterization in Maceió (Brazil), 2016–2024

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Comprehensive analysis reveals urban subsidence patterns in Maceió, indicating risks of flooding and coastal erosion.

To assess and characterize urban subsidence in Maceió, Brazil, from 2016 to 2024.
Utilized SBAS-InSAR ground-motion data from Sentinel-1
Integrated geological and geomorphological context
Applied well-density mapping and physical-environmental metrics
Analyzed morphological metrics to delineate subsiding zones.
Identified multiple subsidence mechanisms across the city
Mapped subsidence covering approximately 55 km2, with 5 km2 exceeding 10 mm yr−1
Revealed connections between subsidence and coastal and lagoonal erosion
Highlighted the need for strategies addressing mining legacies and groundwater abstraction.

Lima et al. (2025) studied this question.

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