PEMETAAN TINGKAT KERAWANAN BENCANA BANJIR DI KECAMATAN LENGAYANG, KABUPATEN PESISIR SELATAN, SUMATERA BARAT

Abstract

This study aims to (1) determine the level of flood hazard vulnerability in Lengayang District, Pesisir Selatan Regency, and (2) map the spatial distribution of areas based on their flood hazard vulnerability levels in the same district. A quantitative descriptive research method was employed. Data collection techniques included documentation, observation, and literature review. Data analysis utilized a scoring and overlay method based on Geographic Information Systems (GIS), incorporating five parameters: elevation, rainfall, land use, slope, and distance to rivers. The study results indicate that (1) flood hazard vulnerability in Lengayang District is categorized into three classes: low, medium, and high vulnerability. (2) Areas with low flood hazard vulnerability account for 65% (43,897 hectares) of the territory, distributed across eight nagari (villages) in Lengayang District. Medium vulnerability areas account for 26% (16,779 hectares), distributed across nine nagari, while high vulnerability areas account for 4% (2,670 hectares), distributed across seven nagari.