Drought Index By Gridded Data

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Since calculating different indices are sometimes sophisticated and time-consuming, so researchers need comprehensive software. As we know, there are three main drought types, namely meteorological, agricultural, and hydrological droughts. The DMAP (Drought Monitor And Prediction) software can calculate different drought indices in three different types of drought that are listed in the following:
1- Meteorological drought
A: Rain Based-drought indices (Salehnia et al., 2017):
SPI (Standardized Precipitation Index, McKee et al. 1993, 1995
DI (Deciles Index), Gibbs and Maher, 1967
PN (Percent of Normal Index), Willeke et al. (1994)
CZI (China-Z Index), Wu et al. (2001)
MCZI (Modified CZI), Wu et al. (2001)
EDI (Effective drought Index), Byun and Wilhite (1999)
RAI (Rainfall Anomaly Index), van Rooy (1965)
ZSI (Z-score Index), Palmer (1965)
B: Other meteorological drought indices:
PDSI (Palmer Drought Severity Index), Palmer (1965)
PHDI (Palmer Hydrological Drought Index), Palmer (1965)
SPEI (Standardized Precipitation Evapotranspiration Index), Vicente-Serrano et al., 2010
RDI (Reconnaissance Drought Index), Tsakiris and Vangelis, 2005.
2- Agricultural drought indices
ARI (Agricultural Rainfall Index), Nieuwolt, 1981
SMDI (Soil Moisture Deficit Index), Narasimhan and Srinivasan, 2005
ETDI (Evapotranspiration Deficit Index), Narasimhan and Srinivasan, 2005
3- Hydrological drought indices
SWSI (Surface Water Supply Index), Garen, 1993
SDI (Streamflow Drought Index), Nalbantis and Tsakiris, 2009

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Sir nice i need some information

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