Nepal-China Transboundary Flood Basin Analyzer

Headwater: Nyalam, Tibet Drop: 2,850 m

Transboundary Hydrological Front: Tibetan Plateau (3,780m) ➔ Melamchi / Barhabise (850m)

Verified figures: 1,385 fatalities, 5,515 missing across Tibetan & Nepal frontier communities.

Casualty & Triage Distribution Verified Source Data

1,385

Confirmed Dead

5,515

Reported Missing

Active Impacted Sector Sindhupalchok / Kavre

Local Sector Casualties 610 Dead · 2,240 Missing

Estimated Peak Surge Speed 14.8 m/s (53 km/h)

Post-Breach Elapsed Time +02h 45m

Glacial / Monsoonal Surge Volume 3,400 m³/s

Calculated Wave Front Elevation 1,620 m ASL

Downstream Inundation Level +7.4m Above Flood Stage

Active Evacuation Radius Priority Tier-1 (0-1.5 km buffer)

Araniko Hwy: Severed Friendship Bridge: Submerged Rasuwagadhi Border: Blocked Air Triage Heli: Tribhuvan/Dhulikhel

Landslides and torrential debris torrents have severed major trans-Himalayan arteries, complicating SAR for the 5,515 missing persons.