Haikou(China)
Geodetic risk profile para sa (20.044°N, 110.1999°E). Ang Haikou ay nauuri sa ilalim ng Extreme Frontline. Ang baybayin ay inuri bilang South China Coastal Basin & Island Arc. Coastal flats 2–5m backed by hills; high exposure to rapid-intensification super typhoons.
🛰️ Talaan ng mga Bagyo na Dumaan Malapit sa Lungsod
Kinalkula gamit ang opisyal na coordinate mula sa RSMC at IBTrACS.
| Pangalan ng Bagyo | Taon | Pinakamalapit na Distansya | Lakas ng Bagyo | Presyon ng Sentro | Bilis ng Hangin | Epekto sa Lupa |
|---|---|---|---|---|---|---|
| 🌀Narra(narra-2026) | 2020 | 28.5 km | tropical storm | 998 hPa | 65 km/h | ⚠️ Direktang Pagtama ng Eyewall (<60km) |
| 🌀Maysak(maysak-2026) | 2020 | 106.3 km | tropical depression | 995 hPa | 72 km/h | 🌪️ Nasa Loob ng Malakas na Hangin |
| 🌀Saudel(saudel-2026) | 2020 | 212.7 km | tropical storm | 996 hPa | 65 km/h | 🌊 Daluyong ng Bagyo at Pag-ulan |
| 🌀Fengshen(fengshen-2025) | 2020 | 294.2 km | tropical storm | 998 hPa | 74 km/h | 🌊 Daluyong ng Bagyo at Pag-ulan |
| 🌀Noul(noul-2026) | 2020 | 538.2 km | severe tropical storm | 975 hPa | 108 km/h | 🌊 Daluyong ng Bagyo at Pag-ulan |
Mga Mekanismo ng Panganib at Ebidensya
Pagsusuri mula sa datos ng panahon hanggang sa tibay ng mga gusali.
01Shallow Bathymetry & Storm Surge Amplification
Grade A (NOAA NCEI IBTrACS / RSMC Real-Time Observation)Historical tracking records verify that cyclone centers have approached within 28.5 km of the city (e.g., Narra with central pressure of 998.0 hPa and winds of 65.0 km/h).
South China Coastal Basin & Island Arc. Direct deep-water oceanic swell crashing onto shallow reef/bay systems.
The inverse barometer effect (approx. 1 cm sea level rise per 1 hPa pressure drop) combined with intense onshore wind stress pushes massive water masses across shallow continental waters, preventing natural tidal egress.
Coastal flood gates and frontline barrier dikes experience hydrodynamic loading far exceeding normal astronomical high tides. Ground floor structures in low-elevation zones face severe submersion risks.
02Boundary Layer Wind Shear & Built Environment Drag
Grade A (Anemometer Ground Truth Archive)Tropical cyclones entering the local coastal zone generate sustained gale-force winds exceeding 65.0 km/h with peak gusts surpassing 65.0 km/h.
Coastal flats 2–5m backed by hills; high exposure to rapid-intensification super typhoons.
As tropical cyclone winds transition from frictionless open ocean to rugged urban coastal surfaces, intense velocity shears and canyon aerodynamic funneling develop between street canyons and high-rise clusters.
Roof membranes, exterior curtain glass, rooftop HVAC units, and unanchored signage are subjected to localized negative pressure suction peaks (uplift failure).
03Compound Pluvial Inundation & Riverine Backwater
Grade B (Regional Hydrological Gage Observations)Slow-moving or stalling cyclones within 300 km deliver multi-day cumulative precipitation commonly exceeding 250–500 mm within 24 to 48 hours.
Low-lying drainage outfalls discharging directly into tidal rivers or bays with minimal hydraulic gravity gradient.
When peak overland stormwater runoff coincides with storm surge wave setup, coastal river mouths become hydraulically choked (tailwater backwater effect), preventing stormwater egress and forcing water back into municipal conduits.
Inland lowlands and underpasses flood rapidly even before the storm center makes closest approach, cutting off secondary evacuation arteries.
🛡️ Gabay sa Paghahanda at Paglikas
Mga tagubilin ayon sa katangian ng lupa at baybayin ng lungsod.
- •Inspect roof fastenings, remove outdoor loose debris, and seal terrace drainage grates.
- •Deploy certified hurricane shutters or impact-rated plywood over vulnerable seaward fenestration.
- •Verify generator fuel reserves and relocate critical utilities above the local 100-year base flood elevation.
- •Move all vehicles from underground parking garages to designated elevated parking structures.
- •Prepare 72-hour emergency potable water reserves (minimum 3 liters per person per day) and non-perishable rations.
- •Strictly comply with local emergency management mandatory evacuation orders for coastal zones A & B.
🌐 Ugnayan ng mga Baybaying Lungsod sa Rehiyon
Tingnan ang iba pang kalapit na lungsod sa parehong karagatan.