Peak Discharge (Q_max)
2,840 m³/s
Wave Front Velocity
11.4 m/s
Flood Crest Pos.
Km 8.4 (Gorge)
Lead Time (Village Plain)
34 min 12 s
High-Gradient Catchment Valley Profile (4,800m → 800m)
Sim Time:
00:00:00
Multi-Station Hydrograph Telemetry (Discharge m³/s vs Time)
Kinematic Wave Routing
Catchment Settlement Risk & Evacuation Thresholds
| Station / Settlement | Elev. | Distance | Est. Arrival | Peak Stage | Status / Action |
|---|
Disaster Presets
Cloudburst Precipitation Rate
85 mm/hr
Antecedent Soil Moisture Saturation
78%
Breach / Outburst Volume (GLOF/LDOF)
4.2 M m³
Manning's Bed Roughness (n)
0.062 (Boulder Choke)
Catchment Basin Area
340 km²
Debris / Sediment Entrainment Ratio
35% Bulking
Mechanics & Hydrology Model
Steep Valley Hydrodynamics
In steep Himalayan catchments (>35° headwaters to 8° valley floors), flood surge attenuation behaves fundamentally differently from lowland rivers. Supercritical flow regimes (\(Fr > 1\)) and massive debris entrainment (up to 50% sediment volume) induce hyper-concentrated slurry waves that resist normal kinematic diffusion.
Early Warning Window
Surge fronts traveling at 8–15 m/s compress acoustic and sensor lead times. As seen in Nepal's Melamchi (2021) and Seti River (2012) tragedies, moraine dam breaches create rapid cascading chokes where flood heights surge 12+ meters above baseline in less than 15 minutes.