Abstract
A prolonged absence of rainfall that results in a temporary reduction or deficit in the amount of natural water available is known as drought. The goal of this article is to examine how drought indices from various nations might be used to simulate the features of drought. Understanding the various drought indexes, as well as their benefits and drawbacks, is crucial. The literature review methodology is employed in this investigation. The Standardized Precipitation Index, or SPI, is the output of the most used modeling technique. Because this technique solely uses the rainfall series, it was discovered that about 57% of the articles utilizing the SPI drought index used the SPI index. The Palmer Drought Severity Index (PDSI), Standardized Precipitation Index (SPI), Standardized Runoff Index (SRI), Standardized Streamflow Index (SSI), and Standardized Precipitation Evapotranspiration Index were used to find additional articles, nevertheless (SPEI). According to several studies, the study methodology often compares drought index approaches using hydrological and meteorological data. It is envisaged that this approach might be applied in other nations to see a place from multiple angles with regard to its hydrology and meteorology.
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