Comparison of Meteorological Drought using SPI and SPEI

Drought assessment is crucial for effective water resources management in a river basin. frequency has increased worldwide recent years due to global warming. In this paper, an attempt made assess the meteorological drought Punpun basin, India using two globally accepted indices namely, Standardized Precipitation Index (SPI) and Evapotranspiration (SPEI). The SPI SPEI at 1-, 3-, 6-, 9-, 12-month timescale were obtained analyze temporal variability of different levels. Correlation analysis available observed data gridded been carried out correlation coefficient was found be 0.956. Hence rainfall from year 1991 2020 used further analysis. Potential evapotranspiration (PET) calculation computed by Thornthwaite method. Water deficit throughout as there decrease increase PET during selected period. results show that period 2004 2006 2009 2010 are periods both almost all timescale. intensity duration have after 2004. A negative trend seasons on timescale, which clearly shows transition near normal moderately dry time highest between scale with R² value 0.92 RMSE 0.28. main outcome study strong same scales adopted study. dependency temperature also Doi: 10.28991/cej-2021-03091783 Full Text: PDF