What are standardized drought indices?

The Standardized Drought Method forecasts drought in terms of standardized indices. The standardized indices are used to indicate water deficits (drought) in different domains of the water cycle (precipitation, evaporation, groundwater, runoff). The most well-known is the Standardized Precipitation Index (SPI).

What are the three drought indices?

The standardized precipitation index (SPI), Palmer drought severity index (PDSI), and standardized precipitation evapotranspiration index (SPEI) have been defined as representative indices for drought analysis based on hydrologic and meteorological data 46 . ...

What are the three drought indices?

The standardized precipitation index (SPI), Palmer drought severity index (PDSI), and standardized precipitation evapotranspiration index (SPEI) have been defined as representative indices for drought analysis based on hydrologic and meteorological data 46 . ...

Which is an index used to monitor drought in the US?

Among them, the Palmer Drought Severity Index (PDSI) is the most prominent index of meteorological drought used in the United States for drought monitoring and research, and its variants have been used to quantify long-term changes in aridity over land in the 20th and 21st century.

Which index is widely used for predicting drought?

SPI is a probabilistic index derived from a tailed distribution of rainfall deficit. Therefore, the scale of SPI is not linear. This has made the forecasting of droughts using conventional statistical methods more challenging.

What are indices for drought monitoring?

Amongst the indicators of meteorological drought, the Standardized Precipitation Index (SPI) and Standardized Precipitation-Evapotranspiration Index (SPEI) are the most well-known.

What are the climate indices for drought?

The Palmer Drought Severity Index (PDSI) uses readily available temperature and precipitation data to estimate relative dryness. It is a standardized index that generally spans -10 (dry) to +10 (wet). Maps of operational agencies like NOAA typically show a range of -4 to +4, but more extreme values are possible.

What is the name of the index which is widely used for predicting drought?

The Standard Precipitation Index (SPI) It can be used on a variety of time scales, which allows it to be useful for both short-term agricultural and long-term hydrological applications. A drought event occurs any time the SPI is continuously negative and reaches an intensity of -1.0 or less.

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I a, , M. Bayasgalan b , S. Khudulmur b , C. Gandush a,c , C.J. Tucker d a The Remote Sensing Laboratory, Jacob Blaustein Institute for Desert Research, Ben Gurion University of the Negev, Sede Boker Campus 84990, Israel b National Remote Sensing Center, Ministry of Nature and Environment, Mongolia c Institute of Meteorology and Hydrology, Ministry of Nature and Environment, Mongolia d Laboratory for Terrestrial Physics, NASA/Goddard Space Flight Center, USA Received 1 August 2005; received i.

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