A Drought index is the computed numerical representations of drought severity, assessed using climatic or hydrometeorological inputs,
including precipitation, temperature, streamflow, groundwater and reservoir levels, soil moisture and snowpack.
They aim to measure the qualitative status of drought on the landscape for a given time period. Indices are technically
indicators as well.
- source: Integrated Drought Management Program
"When drought is described only in terms of lower than expected rainfall, it is referred to as a meteorological drought.
Other names for drought are related to their impact. These include agricultural, hydrological, and socio-economic drought.
The common feature is that impacts often persist long after a meteorological drought has ended – i.e. when it starts to rain again.
The distinction between the various droughts, while clear to water professionals and those directly affected, is not always so clear to the public."
For more information regarding Drought please visit the Integrated Drought Management Program