Transboundary Himalayan Mudslide & Upstream Risk Cascade Analyzer

Alpine Valley Longitudinal Cross-Section Filling Impoundment

Downstream Flood Wave Propagation & Alert Window

Dam Crest Height 55.0 m

Peak Breach Outflow 3,850 m³/s

Surge Arrival (45km) 1.85 hrs

Evacuation Lead Window 5.57 hrs

Hydraulic & Landslide Dam Parameters

Dam Crest Height 55 m

Debris Mass Volume 4.20 M m³

River Baseflow 480 m³/s

Tributary Inflow 210 m³/s

Gorge Bed Width 65 m

Downstream Settlement 45 km

Valley Gradient 14°

Breach Formation Time 6.5 hrs

Computed Upstream & Breach Hazards

Time to Overtopping 7.42 hrs

Lake Capacity 18.45 M m³

Upstream Inundation 8.20 km

Total Inflow Rate 690 m³/s

Hydrological Engine Note: Calculations utilize Costa-Froehlich empirical breach formulations: Q_p = 0.607 * (V_w^0.295) * (h_w^1.24) combined with Saint-Venant 1D routing wave approximations for transboundary gorge propagation.