SAR

NEPAL FLASH FLOOD & SAR CORRIDOR ANALYZER LIVE OPS: BHOTEKOSHI / TRISHULI

GRID: 27°58'N 85°57'E • BASIN HYDRODYNAMICS & COMMS BLACKOUT MODEL

1. Topographic Corridor Longitudinal Profile & Flood Surge

Simulation T+ 00:00:00
SURGE FRONT VELOCITY: 4.8 m/s
PEAK HYDROGRAPH DISCHARGE: 1,840 m³/s
UPSTREAM ELEVATION DROP: 3,400m → 1,220m (Δ 2,180m)
CLICK/SCRUB TO INSPECT SECTORS
ACTIVE SURGE CREST: Sector B (KM 14.2)
+25 min
SECTOR A (KM 4)
Tatopani Gate
SUBMERGED (+4.2m)
SECTOR B (KM 14)
Liping Bridge
CRITICAL (+2.8m)
SECTOR C (KM 26)
Barhabise Hub
RISING (+1.4m)
SECTOR D (KM 42)
Balephi Confluence
SAFE (+0.3m)

2. Canyon VHF/Satellite Line-of-Sight Shadow Visualizer

RAY TRACE: SEVERE SHADOW (84% BLACKOUT)
GORGE ASPECT RATIO: 1:0.35 (Steep V-Canyon)
SAT ELEVATION CUTOFF: > 58° Required
VHF 156.8 MHz (CH 16) 1.2 km Max Range (Gorge blocked)
L-BAND IRIDIUM WINDOW 11 min / 100 min orbit
RECOMMENDED AIR DROP Ridge Relay: Ridge Point 85.96°E

3. Tactical Forcing Controls & Presets

MANNING N=0.065
Cloudburst Precipitation: 115 mm/hr
Light Monsoon (20) Extreme Cloudburst (200+)
Catchment Runoff Index: 0.88 (Saturated Glacial)
Debris Damming & Silt Load: 42% (High Mudflow)
Helicopter Rescue Ceiling: 1,800 ft AGL (Marginal)

4. SAR Sector Triage & Manifest

TOTAL TRAPPED: 68 PAX

Grounded in Sky News field reports: 27-person trekking group isolated at Liping Gorge + remote tea houses.

SECTOR B: LIPING GORGE / KM 14 PRIORITY 1 - IMMEDIATE
Group: 27-Pax Tour Group (Missing)
Est. Bridge Status: WASHED OUT (94%)
Last Contact: 4 hrs ago (VHF Dead)
Isolation Risk: 96 / 100
ACTION: Dispatch foot mountain guide team via High Ridge contour (Avoid riverbed trail).
SECTOR A: TATOPANI HOT SPRINGS / KM 4 PRIORITY 2 - HIGH
Population: 18 Villagers & 4 Trekkers
Bridge Clearance: Submerged (-0.8m)
Terrain Hazard: Debris Slump Active
Isolation Risk: 82 / 100
SECTOR C: BARHABISE MARKET / KM 26 PRIORITY 3 - MONITOR
Population: 15 Local Tea House Staff
Time to Crest ETA: +38 Minutes
Highway Access: Partial Mud Block
Isolation Risk: 58 / 100
SECTOR D: BALEPHI STAGING BASE / KM 42 SAFE - SAR BASE
SAR Personnel: 32 Army / APF Rescuers
Helipad Status: OPERATIONAL
Comms Relay: VHF Repeater Active
Isolation Risk: 12 / 100