Japan Deluge Transit & Grid Cascade Simulator

Operational Scenarios

Hydrological Forcing

Rainfall Intensity 115 mm/hr

Pump Discharge Capacity 65 mm/hr

Substation Flood Water Depth 42 cm

Civil Defenses

Higashi-Kanto Expressway Flood Wall

Narita Ballast Sump Pumps (Keisei/JR)

Chiba Feeder Flood Isolation Switches

Rail Status SEVERED

Stranded at NRT 12,850

Power Outage 20,000

Cascade Telemetry

Peak Stranded Passengers

12,850

Homes Without Power

20,000

Flooded Substations

4 / 6

Grid Recovery Time

18.5 hrs

Infrastructure Inundation Log

⚠️
Keisei Skyliner Mainline: Inundation 50mm over ballast threshold (Trip Cut)
⚠️
JR Narita Express Corridor: Silt runoff at Sakura junction
⛔
Higashi-Kanto Expressway: Submerged between Yotsukaido & Narita IC
⚡
Chiba East 66kV Transformer: Ingress trip triggered (20,000 homes offline)

Grid Restoration Curve (Hours)

Calculated step-down feeder dewatering & transformer insulation dry-out cycle.