Multiscale Spatial Assessment of Determinant Factors of Drought Susceptibility: Study at Area of Central Java

¹ Department of Geographic Information Science, Faculty of Geography, Universitas Gadjah Mada, Yogyakarta, Indonesia
² Badan Nasional Penanggulangan Bencana (BNPB), Jakarta, Indonesia

^* Corresponding author: sudaryatno@ugm.ac.id

Abstract

A multiscale drought vulnerability study has been conducted in Boyolali Regency and the entire Central Java Province using a modeling approach with several spatial analysis methods. This study compares two mappings in the same area with different scales. Mapping agricultural drought vulnerability at different scales will produce different results on several parameters because the coverage and data used have different accuracies. Both mapping scales use data from April to September 2023. The parameters used in both mappings are also the same, namely the Normalized Difference Vegetation Index (NDVI) to determine vegetation density, Normalized Difference Water Index (NDWI) to determine humidity levels, Land Surface Temperature (LST), and land use/landcover with different weights. A multiscale agricultural drought vulnerability study is needed to understand the differences in scale in research related to agricultural drought vulnerability can produce different results. The results of this study are expected to provide a deeper understanding of the implications of scale selection for drought vulnerability studies, especially in Boyolali Regency and Central Java Province.