Question

Causes of Drought and prevention and mitigations

Answer 1

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Drought can be triggered by a high level of reflected sunlight and above average prevalence of high pressure systems, winds carrying continental, rather than oceanic air masses, and ridges of high pressure areas aloft can prevent or restrict the developing of thunderstorm activity or rainfall over one certain region.

Answer 2

Answer:

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Drought

Drought is when a region receives below-average precipitation, resulting in prolonged shortages in its water supply, whether atmospheric, surface or ground water.

Drought is no longer a natural disaster; it is direct consequence of human activity. Drought leads to scarcity of food-grains (akal) , water (jalkal), fodder (tinkal) and often all of these (trikal).

The most prolonged Drought ever in the world occured in the Atacama desert in Chile (400 Years).Drought can be triggered by a high level of reflected sunlight and above average prevalence of high pressure systems, winds carrying continental, rather than oceanic air masses, and ridges of high pressure areas aloft can prevent or restrict the developing of thunderstorm activity or rainfall over one certain region.

prevention

Once a region is within drought, feedback mechanisms such as local arid air, hot conditions which can promote warm core ridging, and minimal evapotranspiration can worsen drought conditions.Protection, mitigation and relief

Agriculturally, people can effectively mitigate much of the impact of drought through irrigation and crop rotation. Failure to develop adequate drought mitigation strategies carries a grave human cost in the modern era, exacerbated by ever-increasing population densities.Strategies for drought protection, mitigation or relief include

mitigation

Dams – many dams and their associated reservoirs supply additional water in times of drought.

Cloud seeding – a form of intentional weather modification to induce rainfall. This remains a hotly debated topic, as the United States National Research Council released a report in 2004 stating that to date, there is still no convincing scientific proof of the efficacy of intentional weather modification.

Desalination – of sea water for irrigation or consumption.Rainwater harvesting – Collection and storage of rainwater from roofs or other suitable catchments.

Recycled water – Former wastewater (sewage) that has been treated and purified for reuse.

Transvasement – Building canals or inter-basin transfer of river water as massive attempts at irrigation in drought-prone areas.