| Issue |
E3S Web Conf.
Volume 605, 2025
The 9th International Conference on Energy, Environment, Epidemiology and Information System (ICENIS 2024)
|
|
|---|---|---|
| Article Number | 03041 | |
| Number of page(s) | 8 | |
| Section | Environment | |
| DOI | https://doi.org/10.1051/e3sconf/202560503041 | |
| Published online | 17 January 2025 | |
Spatial and temporal monitoring of drought hazards in Opak Watershed
1 Department of Environmental Sciences, Faculty of Mathematics and Natural Sciences, Universitas Sebelas Maret, Indonesia
2 Department of Civil Engineering, Faculty of Engineering, Universitas Sebelas Maret, Indonesia
3 Department of Environmental Engineering, Faculty of Infrastructure Planning, Universitas Pertamina, Jakarta Selatan 12220, Indonesia
* Corresponding author: i.suryawan@universitaspertamina.ac.id
The Opak Watershed in Yogyakarta Province has been under persistent drought threat. This study monitored drought conditions spatially and temporally using Sentinel-2 satellite imagery and rainfall data. The Standardized Precipitation Index (SPI) was employed for drought assessment based on rainfall, while the Normalized Difference Vegetation Index (NDVI) and Normalized Difference Moisture Index (NDMI) evaluated drought via satellite images. A Pearson correlation analysis revealed significant relationships: SPI and NDVI (r = 0.527), SPI and NDMI (r = 0.704), and NDVI and NDMI (r = 0.921). The findings provide a comprehensive understanding of drought patterns and trends, revealing critical insights into the development of drought conditions over time and across various locations within the Opak Watershed.
© The Authors, published by EDP Sciences, 2025
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