Question

how can drought be triggered by Physical natural conditions
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Answer 1

hi hope my answer helps :)

How can droughts be triggered by physical natural conditions in South Africa?

Wanders: “The stronger the El Niño signal, the less water is available in the region. These lower discharges also have a direct influence on water storage levels in the reservoirs. If there is a continuous shortage of water feeding the reservoirs, this will inevitably lead to water shortages and thus drought.

Here are the 5 natural and human causes of drought:

1) Land and water temperatures cause drought.

2) Air circulation and weather patterns also cause drought.

3) Soil moisture levels also contribute to drought.

4) Drought can also be a supply and demand of water issue.

How can droughts be triggered by physical natural conditions in South Africa?

Answer 2

Physical natural conditions that trigger drought are:

Very less precipitation

• One of the major causes of drought is very less precipitation or no precipitation at all.
• Precipitation rates vary every year and also vary from region to region.
• When the precipitation rate is less than the average and it sustains for a longer period of time, it results in droughts.
• High-temperature changes and wind pattern changes are factors that lower the rainfall rates.

El Nino

• El Nino effect is the change in ocean temperature due to the combined effect of atmospheric changes and ocean currents.
• This effect gives rise to very hot, dry weather resulting in droughts.

Dry season

• The dry season is a season in regions with tropical climates.
• It is the season without any rainfall which comes every year.
• Low humidity is the main characteristic of this season.
• Thus, the evaporation rates are extremely high during this season
• This dries up almost all the water bodies, thus resulting in droughts.
• This season is also prone to higher temperatures and hence it worsens the droughts.