#Drought Tools in AgriMetSoft:
https://agrimetsoft.com/dmap
https://agrimetsoft.com/rdit
https://agrimetsoft.com/mdm
Playlist in AgriMetSoft: https://agrimetsoft.com/drought_course
#Drought_Lesson Videos: https://bit.ly/36TrmEJ
Meteorological #Drought_Indices and #Drought_Classification
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What is Meteorological Drought's definition?
What are Meteorological_Drought Indexes?
What are rainbased Meteorological #Drought_Indices?
What is the Drought Classification concept?
The American Meteorological Society (1997) groups drought definitions and types into four categories: meteorological or climatological, agricultural, hydrological, and socioeconomic. The definitions of meteorological drought are locationspecific since normal precipitation is a function of the climate. Some definitions of meteorological drought focus on the length of time since the last precipitation event (number of consecutive dry days). In contrast, others focus on the magnitude of the precipitation departure from usual. Meteorological drought focuses on the deviation of local water balance from normal conditions. Meteorological drought refers to a lack of rainfall compared to longterm means.
Drought characterization is typically done with the help of drought indices. Drought indices are tools that combine different datasets into a single number which aids decisionmaking in water resources planning (Adnan, 2017). Most drought indexes are based on meteorological or hydrological variables. To decrease the impact and loss caused by drought, it is vital to obtain realtime information on the occurrence, scope, intensity, duration, and impact of drought.
We have three different kinds of meteorological drought indices: 1) Rainbased drought indices that include SPI (Standardized Precipitation Index), DI (Deciles Index), EDI (Effective Drought Index), PI (Percentile Index), CZI (ChinaZ index), MCZI (Modified CZI), RAI (Rainfall Anomaly Index), and ZScore index. These indices only need rainfall data as input data for calculating meteorological drought. 2) The second type includes SPEI (Standardized Precipitation Evapotranspiration Index) and RDI (Reconnaissance Drought Index), which need Evapotranspiration data besides precipitation data, and 3) The third group consists of PDSI (Palmer Drought Severity Index) and KBDI (KeetchByram Drought Index) that need temperature and other data beside rainfall data.
All types of drought originate from a deficiency of precipitation that results in a water shortage for some activity or some group (Wilhite and Glantz 1985). Fortunately, rainfall is an accurate and more commonly available element over a long period of record.
We have another concept entitled "Main drought classification," in which we can denote five main categories for the drought classification, namely D0 (abnormally dry), D1 (moderate drought), D2 (severe drought), D3 (Extreme drought), and D4 (exceptional drought)
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