TSUNAMI COASTLINE BARRIER ASSESSMENT CHABAHAR PORT, IRAN

Chabahar port located in the southeast of Iran has a high tsunami potential risk. Any earthquake with higher than 7.0 (Mw) magnitude occurs in Makran Subduction Zone, can produce a tsunami and the Chabahar port will be affected. The greatest earthquake experienced in the Makran subduction zone was in 1945, with an 8.2 Mw, which caused the catastrophic tsunami with 4,000 fatalities. According to the report of Remembering the1945 Makran Tsunami , compiled by the Intergovernmental Oceanographic Commission (UNESCO/IOC), the maximum inundation of Chabahar port was 367 meters toward the dry land, which had a height of 3.6 meters from the sea level. In this paper, a coastal barrier with 5 meters height in the entire coastal line of Chabahar port is simulated and the effect of this coastal barrier against tsunami waves using evaluated differently during earthquake 8.0, 8.1, 8.2, 8.3 and 8.4 (Mw). The simulation provided that the coastline barrier will be effective and preserve the Chabahar port from tsunami waves during the earthquake with the magnitude up to 8.3 (Mw) and prevent the tsunami waves to the Chabahar port during inundation. While in the normal situation (without a coastal barrier) the tsunami waves will reach to Chabahar port 13 minutes after earthquake rupture and finally the maximum run-up will achieve to 18.3 meters above mean sea level and tsunami inundation will be 7.44 Km^2 on the dry land of Chabahar port.