Tsunami Hazard and Built Environment Damage Observations from Palu City after the September 28 2018 Sulawesi Earthquake and Tsunami

摘要: The 2018 Sulawesi earthquake (Mw 7.5) and tsunami destroyed many buildings caused more than 3300 fatalities in Sulawesi, Indonesia. Damage reports satellite images from Palu City indicated severe impacts to lifelines infrastructure within 300 m the coastline. Seven-weeks after a field survey was carried out measure flow depths record damage levels for buildings, roads electricity infrastructure. Above ground level measured at 371 building sites ranged 0.1 3.65 m, with 1.05 m mean 0.55 m standard deviation. team also recorded attributes 463 7.9 km of road 455 utility poles. We observed that non-engineered ‘light timber’ ‘lightly reinforced concrete’ construction frame were highly susceptible ‘non-structural’ component when respectively exceed 0.4 m 1 m above first finished floor level, while unrepairable or complete regularly exceeded 1.2 m. Only non-structural engineered ‘reinforced buildings. While depth traces could not be affected pole components, hazard intensity parameters can obtained inundation maps estimate conditions contributing levels. information presented herein forms an important evidence base support future risk research