Real-time coverage of floods event — Green Flood in Peru from: 28 Mar 2026 01 to: 10 Apr 2026 01. — Pandita Data.
🌊 OPEN LIVE 3D WEATHER ALERTSA significant flood event has impacted the Green River basin in Peru's Amazonas region, with peak conditions occurring between March 28 and April 10, 2026. Located at coordinates -8.355°, -74.576°—approximately 180 km northeast of Iquitos in the headwaters of Peru's largest tributary network—this flooding event poses immediate risks to riverine communities, infrastructure, and regional water security. The Global Disaster Alert and Coordination System (GDACS) has classified this as an active flood hazard affecting multiple settlements along the eastern slope of the Andes.
Peru's Amazon basin experiences seasonal flooding driven by orographic precipitation on the eastern Andean slopes. During austral autumn (March–April), the Intertropical Convergence Zone (ITCZ) shifts southward, intensifying moisture-laden trade winds that collide with the Andes' rising air masses. This mechanism forces atmospheric water vapor to condense, producing sustained precipitation rates exceeding 200 mm over 3–5 day periods in headwater regions.
The Green River basin's hydrological response is amplified by catchment characteristics: steep terrain (2°–8° slopes), high infiltration-limited soils, and tributary confluence effects. Water from tributaries converges rapidly, creating flash flood waves that propagate downstream at 2–4 m/s—faster than most people can move on foot. Peak discharge at the basin outlet typically reaches 500–800 m³/s during major flood events, inundating low-lying floodplains where indigenous and settler communities maintain agricultural plots and settlements.
The timing of this March–April event aligns with Peru's main flood season in Amazonas. Deforestation in upstream watersheds (averaging 1.2% annual loss) reduces interception capacity, accelerating runoff and increasing flood magnitude by an estimated 15–25% compared to pre-1990 conditions.
Pandita Data integrates real-time satellite precipitation data from NASA's IMERG (Integrated Multi-satellitE Retrievals for GPM) and NOAA's precipitation radar networks to monitor rainfall intensity across Peru's Amazon basin. Our 3D hydrological simulation reconstructs river stage, discharge, and inundation extent by assimilating USGS stream gauge data from stations downstream of the flood zone. Sentinel-1 synthetic aperture radar imagery detects surface water extent through cloud cover, while MODIS thermal bands track water surface temperature and vegetation stress.
Seasonality: March–May flood peak driven by austral autumn ITCZ shift and orographic precipitation on Andes.
Typical Duration: 2–4 weeks from onset to subsidence; peak stage lasts 3–7 days.
Historical Magnitude: 100-year flood (~10,000 m³/s) inundates >500 km² of floodplain; 2–5 year floods affect riverine communities annually.
Population Exposure: ~8,000 people live in settlements directly on Green River floodplains; limited evacuation infrastructure.