Hazard Analysis
Grouping of landslide-prone areas is done by using Geographical
Information System (GIS) program. The analysis includes landslide,
slope, lithology and groundwater flow data using Cummulative Rainfall
Departure (CRD) as a factor that encourages change.
In the analyst’s point of view each of these factors has different
weights or effects and the landslide disaster analysis in the lower
regions is eliminated.
The data to be modeled and analyzed were obtained from the IPCC with
basic projections (1980-2017), projections I (2018-2023) and projection
II (2024-2030), as one of the factors driving environmental changes to
disaster hazard maps for landslides. The frequency of rainfall, the
occurrence and a lot of rain water is different in each season.
In Indonesia there are 2 seasons, the rainy season usually occurs in
October-May. And the dry season occurs in April-October. Each season has
different rainfall characteristics. It causes different impacts on the
impacts that can trigger the occurrence of landslides. However, if it is
linked to climate change then the impact can be attributed to changes in
rainfall. Therefore, landslide hazard modeling can be used as a
reference for landslide projections that occur in the future by
analyzing rainfall scenarios occurring on a monthly basis for future
projection.