Parameter Tree:
EARTH SCIENCE SERVICES > ENVIRONMENTAL ADVISORIES > HYDROLOGICAL ADVISORIES > DROUGHT

Definition:
Drought should be considered relative to some long-term average condition of
balance between precipitation and evapotranspiration (ET) in a particular area,
a condition often perceived as "normal." Common to all types of drought is the
fact that they originate from a deficiency of precipitation that results in
water shortage for some activity or for some group. It is also commonly
recognized that other meteorological elements, such as temperature, wind, and
relative humidity, may aggravate the severity and impacts of drought in some
instances.


A Drought Advisory may report on drought occurring in a particular region.


Reference:
Adapted from:
http://www.env.gov.bc.ca/rib/wat/rfc/archive/2001/200106/drought.htm