Variation of agriculture drought in Ninh Thuan province in the period of 1991-2019

Abstract

     Drought in the South-Central region in general and in Ninh Thuan province is very complicated, greatly affecting life and production in the region. This study presents the method and results of analysis of changes in agricultural drought characteristics based on NDVI and VSDI indexes in Ninh Thuan province from 1991 to 2019. These agricultural drought indexes are calculated based on data from Landsat satellite images collected along with six drought events in the study area. Research results have shown that, for agricultural droughts from the period 1991 - 2019, Ninh Thuan province often suffers from droughts ranging from fair drought to extremely severe drought. The area with extreme drought and extreme drought often accounts for 15.7% - 28%, causing waste of land resources and can greatly affect the production and living activities of people. VSDI index has great similarities with other term index indexes such as NDDI, NDWI, and surface temperature is easy to calculate, and can be widely applied in the future