InSAR subsidence monitoring

A radar-based monitoring workflow that quantifies land subsidence across the Semnan plain and aligns it with ground truth observations.

Slide 1

Millimetric subsidence rates mapped for Semnan’s critical infrastructure via PS/SBAS processing.

Slide 2

Analytical GIS view combining hotspot clusters, trend charts and infrastructure filters for inspections.

Slide 3

Longitudinal subsidence profile paired with maintenance actions for rail safety.

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Geospatial analytics

InSAR subsidence monitoring

A radar-based monitoring workflow that quantifies land subsidence across the Semnan plain and aligns it with ground truth observations.

StatusOperational

ProvinceSemnan

DomainGeospatial analytics

Executive summary

Land subsidence threatens infrastructure and communities in Semnan. Our programme processes Sentinel-1 radar stacks to measure ground deformation and translates the results into actionable reports for provincial committees.

Challenges addressed

Lack of frequent, reliable deformation measurements.
Exposure of roads, transmission lines and urban assets to gradual sinkage.
The need to document evidence for regulatory coordination.

Delivery approach

Ingest monthly Sentinel-1 scenes and perform time-series InSAR processing.
Cross-validate displacements with GPS and field surveys.
Publish hotspot maps and commentary for decision-makers.

Delivered outcomes

Interactive deformation layers with temporal trends.
Briefings for the groundwater task force.
Recommendations on where to expand ground instrumentation.

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