Abstract
Landslide is the third largest disaster in Indonesia, including in Probolinggo. Approximately 50% of Probolinggo regency area is a potential landslide region. This area is located in the southern part of Probolinggo regency with hilly terrain and slopes. The number of landslide events in 2015-2016 is recorded 21 events. Potential landslide hazard was analyzed by SINMAP (Stability Index Mapping) method using physic condition, slope, digital elevation model, and rainfall. The risk level of landslide hazard is derived from the crosstab between landslide hazard potential and vulnerability index covering exposure aspect, sensitivity, and adaptive capacity with variables consisting of population density, livelihood, the proportion of the vulnerable population, building quality, and the number of poor households. The high risk of landslide hazard in Probolinggo regency is found in four districts of Lumbang, Pakuniran, and Kotaanyar sub-district. Potential landslide areas are spread in the south of Probolinggo Regency, especially in Krucil subdistrict with 15-40 % slopes. Based on the spread of landslide location, as many as 81% of landslide locations occur in high and medium landslide potential areas.
Highlights
Indonesia is a region that has an undulating morphology from coast to mountain
Potential landslide area in Probolinggo regency is dominated by moderate landslide hazard areas with an area of 36.105 Ha or equal to 21.29% of the total area of Probolinggo Regency
Distribution of landslide potential area by subdistrict in Probolinggo regency is shown in following Table 4
Summary
Indonesia is a region that has an undulating morphology from coast to mountain. In line with the situation, Indonesia is a disaster prone area. One of the Natural disasters that hit Indonesia is landslide. According to data from the National Disaster Management Agency (BNPB) in 2016, there is 3649 number of landslide events from 1998 to 2016, spread across Indonesia [1]. East Java Province is one of the high potential areas of landslide disaster. This is due to hilly and mountainous of its topography. It is caused by the high density of population in the hilly area that causing pressure on the ecosystem. The landslides are certainly very detrimental to the community because of the resulting loss of life and the destruction of facilities and infrastructure such as road cuts, damage to irrigation channels, settlements, markets and so forth
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