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Preliminary identification of earthquake triggered multi-hazard and risk in Pleret Sub-District(Yogyakarta,Indonesia)

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Geo-Spatial Information Science 2021年第2期24卷 256-278,I0006页

作者： Aditya Saputra Christopher Gomez ioannis delikostidis Peyman Zawar-Reza Danang Sri Hadmoko Junun Sartohadi Faculty of Geography Universitas Muhammadiyah SurakartaCentral JavaIndonesia Graduate School of Maritime Sciences Laboratory of Volcanic Risks at Sea Kobe UniversityKobeJapan Geography Department School of ScienceUniversity of CanterburyChristchurchNew Zealand Geography Faculty Universitas Gadjah MadaYogyakartaIndonesia Department of Soil Science Faculty of AgricultureUniversitas Gadjah MadaYogyakartaIndonesia

Yogyakarta is one of the large cities in Central Java,located on Java Island,*** city,and the Pleret sub-district,where the study has taken place,is prone to earthquake hazards,because it is close to several seismically active zones,such as the Sunda Megathrust and the active fault known as the Opak *** a devastating earthquake of 2006,the population of the Pleret sub-district has increased ***,the housing demand has increased,and so is the pace of low-cost housing that does not meet earthquake-safety requirements,and furthermore are often located on unstable *** local alluvial material covering a jigsaw of unstable blocks and complex slope is conditions that can amplify the negative impacts of *** this context,this study is aiming to assess the multi-hazards and risks of earthquakes and related secondary hazards such as ground liquefaction,and coseismic *** achieve this,we used geographic information systems and remote sensing methods supplemented with outcrop study and existing seismic data to derive shear-strain *** results have revealed the presence of numerous uncharted active faults with movements visible from imagery and *** that the middle part of the study area has a complex geological structure,indicated by many unchartered faults in the *** this newly mapped blocks combined with shear strain data,we reassessed the collapse probability of buildings that reach level>0.75 near the Opak River,in central Pleret *** the buildings and from population distribution,we could determine that the highest risk was during nighttime as the buildings susceptible to fall are predominantly housing *** secondary hazards follow a slightly different distribution with a concentration of risks in the West.

关键词： Earthquake multi-hazard and risk coseismic landslide outcrop study liquefaction

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