Analisis Zonasi Permukiman Terhadap Risiko Longsor dan Banjir Hidrometeorologi Desa Sembalun Lawang, Gunung Rinjani
DOI:
https://doi.org/10.33830/Reksabumi.v5i2.14571.2026Keywords:
geospatial analysis, settlement zoning, DEM, spatial planning, Mount RinjaniAbstract
Sembalun Lawang Village is a highland area located on the slopes of Mount Rinjani that is prone to landslides and hydrometeorological flooding due to steep terrain, young volcanic materials, and high annual rainfall. This study aims to evaluate the suitability of settlement zoning in relation to landslide and hydrometeorological flood risks using a geospatial analysis approach. The data used include 8-meter resolution DEMNAS, 1:25,000 scale Rupa Bumi Indonesia (RBI) data, 2023 land use data, rainfall data for the 2015–2024 period, Sentinel-2 image interpretation, and field verification at 10 sample points. The analysis was conducted through slope classification, surface flow accumulation analysis, actual settlement distribution mapping, and spatial overlay to generate multi-risk-based settlement zoning recommendations. The results show that annual rainfall in the study area ranges from 3,000 to 4,000 mm/year, with 55% of the area exceeding 4,000 mm/year. Actual settlements are concentrated in lower areas with slopes of <15%, which are relatively stable geomorphologically but function as surface runoff accumulation zones. In contrast, some planned settlement zones are located on slopes of >25%, which have higher instability potential. The final zoning results indicate that the high-security/recommended zone covers 1,085.58 ha or 24.68% of the study area, the medium-security/conditional zone covers 934.62 ha or 21.25%, while the low-security/control zone dominates with 2,378.77 ha or 54.07% of the study area. These findings emphasize the need to evaluate settlement zoning through a risk-informed spatial planning approach by integrating slope stability and surface runoff dynamics to support safer, more adaptive, and sustainable settlement development.
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