GIS-BASED ANALYSIS OF SLOPE, LANDSLIDE AND FLOOD HAZARDS, AND LAND USE INTEGRATED WITH INDIGENOUS KNOWLEDGE IN NAGARI SIJUNJUNG, INDONESIA

This study aims to examine how the traditional settlement of Nagari Sijunjung, guided by the Minangkabau philosophy of Alam Takambang Jadi Guru, aligns with the area's physical characteristics and functions as an inherent disaster risk reduction system.Specifically, it analyzes the relationship between slope conditions, land use, and hazard potential by integrating indigenous spatial planning with Geographic Information System (GIS)-based risk analysis.The study was conducted in Nagari Sijunjung, a 157.1 ha cultural heritage site in West Sumatra, Indonesia, containing 77 traditional Rumah Gadang, sacred sites, and diverse clan settlements.Spatial datasets from satellite imagery, Digital Elevation Model (DEM), and official maps were overlaid with indigenous zoning to assess congruence between cultural principles and hazard avoidance strategies.Results show that flat and gentle slopes (0-8%) serve as the core zones for settlements and agriculture, while steeper slopes (8-15%) are preserved as protected forest or rubber plantations, functioning as ecological buffers against landslides.Flood-prone River plains are allocated for seasonal agriculture, while settlements are located on slightly elevated terrain.In conclusion, indigenous zoning closely aligns with physical hazard assessments based on slope, soil, geology, rainfall, and land use analysis, demonstrating that traditional planning offers a culturally grounded and hazard-aware model for community-based disaster risk reduction.