ABSTRACT

Jember Regency has six sub-districts prone to tsunami disasters, one of which is Ambulu Sub-district. In 1994, it was discovered that two beaches in Ambulu District were affected by the tsunami disaster. The potential for a tsunami disaster on the coast of Ambulu District could affect the safety of tourists and coastal communities in Ambulu District. This research aims to develop mitigation priorities with spatial modeling to help visualize the worst possibility of occurring. The method used is spatial analysis by processing DEM data into slope, then filling in the roughness coefficient value for land cover, followed by modeling tsunami inundation, analyzing affected land use, and using the Analytical Hierarchy Process (AHP) to determine mitigation priorities. The results of this research showed that the tsunami inundation area with a 4 m wave scenario reached 219.09 ha, while the tsunami inundation area with an 11 m wave scenario reached 765.23 ha. The highest area of land affected by tsunami inundation in the 2 scenarios is agricultural land, with an area of 68.71 ha and 343.95 ha. Based on the area obtained, it can help in determining mitigation actions with the help of the AHP method so that priority mitigation directions for the tsunami disaster in Ambulu District, Jember Regency, are obtained, namely the use of tsunami dampening buildings and education, counseling, and public awareness.