SPATIAL ANALYSIS OF TSUNAMI THREAT LEVEL IN THE COASTAL OF JEMBER REGENCY, EAST JAVA, INDONESIAKHOIRUL ANWAR, MAX RUDOLF MUSKANANFOLA AND MUHAMMAD HELMI
As the most vulnerable country for tectonic earthquakes, Indonesia is surrounded by ring of fire from Eurasia, Indo-Australia and the Pacific plate. One of the most vulnerable areas in Indonesia is the coastal area of Jember Regency which is located in the south coast of Java. The development of mapping technology is one of the options in determining the location of disaster prone zones. The application of Geographic Information System based on technology combined with remote sensing data is one of computational media that can be used to determine tsunami threat level based on some physical parameters, thus producing new output in the form of thematic map. This study aims to determine the level of threat of coastal areas of Jember Regency against tsunami waves. Multi-criteria analysis based on Geographic Information System (GIS) and Remote Sensing (RS) to know the level of tsunami threat in Jember Regency, the researcher uses several geospatial variables from land elevation, land slope, coastal typology, morphology, distance from coastline, distance from river, land use, and terrestrial protection to build weighting schemes for geospatial variables. This paper reviews briefly the physical parameters (altitude, slope, coastal characteristics and distance from the coastline), as well as the determination of tsunami threat levels in Jember Regency based on spatial analysis. In general, Jember Regency has 4 districts that are highly threatened by the tsunami disaster. They include Kencong District, Gumukmas District, Puger District, and Ambulu District. While the other 2 districts of Wuluhan District and Tempurejo Districts possess low and very low threat levels.
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