Historical Flood Archive/Verified Disaster Scenarios
Disaster Event Library
Curated and verified historical flood inundation scenarios with ground-truth Copernicus Sentinel-1 SAR observations, OpenStreetMap road networks, and hydrological gauge data.
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Active Benchmark2022-06-20
Assam Brahmaputra Basin Flooding
Barpeta, Assam, India
Extent412.8 km²
Cut Off61,100
Roads41.7 km
Archived Scenario2008-08-28
Bihar Kosi River Embankment Breach
Supaul & Madhepura, Bihar, India
Extent2840 km²
Cut Off320,000
Roads185 km
Archived Scenario2018-08-16
Kerala Extreme Precipitation & Reservoir Surge
Ernakulam & Alappuzha, Kerala, India
Extent680.5 km²
Cut Off145,000
Roads112.4 km
Archived Scenario2020-08-19
Godavari Basin Lower Reach Inundation
East & West Godavari, Andhra Pradesh, India
Extent520 km²
Cut Off48,000
Roads64 km
Verified Copernicus Sentinel-1May 28 – June 28, 2022
Assam Brahmaputra Basin Flooding
Catastrophic monsoon riverine inundation across Barpeta-Mandia corridor
Inundation Area
412.8 km²
Sentinel-1 C-SAR drop
Civilians Isolated
61,100
Severed access corridors
Roads Cut Off
41.7 km
Submerged culverts
Peak Inundation
2022-06-20
CWC crest recorded
Disaster Narrative & Hydrology
Pre-monsoon cloudbursts triggered severe flooding across 32 districts, affecting over 5.4 million people. Specular radar reflection dropped below -14.5 dB over 412.8 km² in Barpeta district, isolating major char communities along the Brahmaputra and Beki rivers.
Remote Sensing & Sensor Provenance
Sentinel-1A C-SAR (10m)
Sentinel-2 MSI
CWC Gauge Beki River
Analytical Findings & Rescue Considerations
Continuous radar penetration through 100% monsoon cloud cover (Track 121)
NetworkX graph analysis identified 5 completely severed char settlements
Kalgachia Civil Hospital isolated; Beki river gauge recorded +1.86m above danger level
Spatial Extent: [90.75, 26.25, 91.15, 26.55]