Last modified: 2022-09-03
Abstract
Jeneberang watershed has an important role in maintaining environmental stability, especially for the surrounding areas. In 2004 a landslide occurred in the Jeneberang watershed which caused casualties and material losses. This study aims to determine the distribution and level of landslide hazard in the Jeneberang watershed and to formulate an effective scenario to reduce the level of the hazard. This research is located in Jeneberang watershed, South Sulawesi Province. The data used include data on the weight of each parameter and criteria for determining landslide susceptibility obtained from expert interviews, land use maps obtained from analysis of Landsat 8 OLI satellite imagery in 2020, slope maps, rainfall maps, forest area status maps, and type maps. land. The method used is the integration of AHP and MCE for landslide hazard assessment, GIS analysis and Spatial Decision Making for scenario simulation. The results of the analysis show that the rainfall parameter has the highest weight in determining the level of landslide hazard with a value of 0.327, the results of the MCE analysis for assessing the level of landslide hazard in the Jeneberang watershed show that there are 19,108 ha or 18% of the area in the Jeneberang watershed which is classified as a high hazard level. The results of the analysis show that the use of effective scenarios reduces the landslide hazard at a high hazard level. In the optimistic scenario it can reduce the high hazard level by 49%, while in the moderate scenario it is effective in reducing the high hazard level by 53%, while in the pessimistic scenario it is effective in reducing the high hazard level by 79%.
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