Drought in West Sumbawa: Non-Structural Mitigation Efforts Through Mapping and Policy Recommendations

Abstract

This study aims to map the level of drought across sub-districts in West Sumbawa Regency. The research was conducted through several stages, including preparation, collection of both primary and secondary data, data processing, data analysis, and the development of a comprehensive assessment. The primary data required include the Normalized Difference Vegetation Index (NDVI) map, Normalized Difference Water Index (NDWI) map, Land Surface Temperature (LST) map, average Rainfall map, hydrogeological map, and land use map. The drought level mapping in West Sumbawa Regency was carried out using an overlay technique involving six parameters through remote sensing, which was subsequently processed using ArcGIS software. The results indicate that high to very high drought levels occur in Pototano, Brang Rea, and Jereweh sub-districts. The spatial distribution of drought levels can be utilized to establish priority areas, particularly Pototano, Sekongkang, and Jereweh sub-districts, in decision-making processes as part of drought disaster mitigation efforts and as an early warning measure to prevent more severe future impacts.