Analisis Kerawanan Longsor Berdasarkan Parameter Geologi dan Geospasial di Biluhu Timur, Kecamatan Batudaa Pantai, Gorontalo

Najib Modeong, Muh Kasim, Ronal Hutagalung

Abstract


Biluhu Timur Village and its surroundings, located in Batudaa Pantai District, Gorontalo Regency, have a topography ranging from hills to coastal plains and relatively high rainfall, which makes them prone to landslides. This study aims to analyze the geological and geomorphological conditions and to map landslide susceptibility zones in Biluhu Timur Village and its surroundings at a scale of 1:25,000. The method used is Multi Criteria Evaluation based on a Geographic Information System (GIS), applying scoring, weighting, and overlay of six parameters: slope, rainfall, lithology, land use, soil type, and lineament density. The study area consists of four geomorphological units and four rock units, namely basalt, diorite, reef limestone, and coastal deposits, with joints as the secondary structure. The analysis of an area of 2,899.48 ha shows that high susceptibility covers 1,455.51 ha (49.16%), moderate susceptibility 1,351.29 ha (47.64%), and low susceptibility 92.68 ha (3.20%). Biluhu Timur Village falls within the high susceptibility class.


Keywords


Landslide Susceptibility; Geographic Information System; Scoring and Overlay; Geology; Biluhu Timur

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References


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DOI: https://doi.org/10.37905/jrpi.v3i4.41814

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