Normalised Difference Vegetation Index Based Drought Monitoring Using Remote Sensing and GIS
B Sreekanthand S Vidhya Lakshmi
Abstract
Abstract The objective of this research is to analyse vegetation’s reactions to precipitation. Three Pinups sp. combinations and water tension conditions (pine) forests and NDVI’s assessment of the capacity to identify drought and water stress in this sort of ecosystem. For the purposes of this analysis, a 30-year time series of NDVI indices, derived from SPOT-Vegetation data, is built for all three study sites and compared with field measured precipitation data for the same time span. Results indicate a good relationship between the two indices suggesting a stronger capacity for investigating the vegetation water status. In general, fluctuations in high seasonal precipitation tend to have a strong influence on both NDVI ratios, while a smoother spread of precipitation results in a poorer relationship with the two indices.