Drought is a complex phenomenon that has harmed more people than any other natural disaster in the last century (Below, 2007). Drought assessment tools include…
What do the NDVI values mean ? In remote sensing, the most commonly used index is the NDVI. But how do you figure it out?…
The precipitation concentration index (PCI), proposed by Oliver (1980) and developed by De Luis and others in 1997. It is an index to analyze the…
Standardized precipitation and Evapo-transpiration index The SPEI (Standardized Precipitation Evapotranspiration Index) is a variant of the widely used Standardized Precipitation Index (SPI). In evaluating drought,…
