Oman Sea Tsunami Risk Assessment along the Makran Coast

Natural Disaster Risk Assessment Is a vital step in establishing standards and generally prioritizing efforts to decline hazards risk. therefore, The Tsunami event is considered as one of the most devastating natural disasters. This Natural Phenomenon Can be considered as a serious threat in coastal areas, ports and piers and cause irreparable damages. Historical Records Indicate that tsunamis in the Indian ocean could influence parts of southeastern Iran. in addition to the risk of tsunamis coming from the Indian ocean, the active Makran fault is located in the vicinity of the coastline of the Oman sea and at a distance of about 100 km. This Fault Is the most dangerous fault that is located parallel to the Iranian coastline and is capable of causing large tsunamis. Also, Makran region is tectonically capable of causing large earthquakes induced tsunami and obviously the tsunami risk from Makran subduction zone is a serious threat to the southern coast of Iran that making the study of tsunami risk necessary for this region. The aim of this study was to assess the vulnerability of coasts in Sistan and Baluchestan province to tsunami risk. in this study, fuzzy logic and analytical hierarchy process (AHP) Models were combined to extract and analyze the vulnerability of the coasts in this province to tsunami risk. In This Study, the risk of tsunami vulnerability in the coasts of Sistan and Baluchestan were assessed in five classes as very low, low, medium, high and very high using four parameters including distance to coastline, elevation, slope, and vegetation cover. Fuzzy-AHP method using satellite images and spatial data within google earth engine cloud based environment and geographical information system. The results showed that 217.08 km2, 542.64 km2, 978.84 km2, 1218.35 km2, a1286.76 km2 of the study area are placed in very low vulnerability, low vulnerability, moderate vulnerability, high vulnerability, and very vulnerable regions, respectively. The Chabahar, Konarak and Bryce cities as well as majority of the coastal villages are located in the high vulnerability Tsunami Zone