EQ2; what factors influence the hydrological system over short and long term timescale?
Drought: a shortfall or deficiency of water over an extended period of time.
- The measurement of drought depends on the country/ environment and rainfall
norms.
Reasons for drought;
Meteorological Drought: Long term
precipitation is lower than normal over a
long period.
Agricultural Drought: insufficient soil
moisture to meet the needs of the crops.
Hydrological Drought: deficiencies in
surface and subsurface water supplies.
Socio- economic/ famine Drought:
demand for water supply (social and
economic purposes) exceeds the
availability. May lead to famine and
widespread humanitarian crisis.
Agricultural
drought is a
consequence of
meteorological.
Agricultural can
lead to famine.
They are all
consequences of
no rain.
Meteorological is
the reason for the
other reasons of
drought.