Drought Monitoring during the dry season by NDDI index on Google Earth Engine, a case study at Dak Nong province
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Keywords

Drought index
composite images
Google Earth Engine. chỉ số hạn hán NDDI
ảnh tổ hợp
công cụ Google Earth Engine

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How to Cite

Tong, T. H. A., Nguyen, P. H., Le, H. D., Vo, H. H., & Pham, T. L. (2020). Drought Monitoring during the dry season by NDDI index on Google Earth Engine, a case study at Dak Nong province. Journal of Geodesy and Cartography, (46), 49–56. https://doi.org/10.54491/jgac.2020.46.52

Abstract

In this study, the authors analyzed the relationship between the NDVI, NDWI, NDDI indexes and drought condition of Dak Nong province. Landsat images data in dry season from 2005-2019 quickly collected, pre-processed and calculated on Google Earth Engine. The results showed that NDWI and NDDI are more sensitive indicatior for drought than NDVI. In which, NDDI value > 0.8 and NDWI <0.1 are areas with slight drought. The higher the NDDI index, the higher the ability of a drought phenomenon. Therefore, this NDDI can be used as an indicator for drought monitoring for Dak Nong province during the dry season.
https://doi.org/10.54491/jgac.2020.46.52
PDF (Tiếng Việt) | Download: 389

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