HOW WOULD YOU DEFINE A DROUGHT?
Long-term records allow us to build a historical picture of drought in an area. This can be tricky as drought is influenced by many variables, including the amount of rainfall, its timing, run-off, temperature and humidity, season and the environment. However, because these factors are seldom properly recorded, we mostly use weather data, notably rainfall, to define drought. Simply put, drought is an unusually dry period.
Arguably, the best way to classify an area as experiencing drought is by its effects on the ground, such as crop failure, scarcity of drinking water, fodder shortages, reduced stream flow, and plant and animal mortality.
Droughts are, of course, a feature of semi-arid rangelands owing to the high rainfall variability typical of such areas. It’s small wonder…
