EVERYDAY SCIENCE

Detailed explanation-1: -Drought is the most serious physical hazard to agriculture in nearly every part of the world. Categorized four basic approaches to measuring drought: meteorological, hydrological, agricultural, and socioeconomic.

Detailed explanation-2: -Drought is a long period without rains leading to a severe shortage of water in the region. The soil continues to lose water by evaporation and transpiration. If, however, it does rain at all or the rainfall is very low for a long period, the loss of water from the soil is not made up and hence the soil becomes dry.

Detailed explanation-3: -Meteorological Drought is based on the degree of dryness or rainfall deficit and the length of the dry period. Hydrological Drought is based on the impact of rainfall deficits on the water supply such as stream flow, reservoir and lake levels, and ground water table decline.

Detailed explanation-4: -Natural causes. Some droughts have occurred naturally, plaguing humankind throughout much of our history. Altered weather patterns. Excess water demands. Deforestation and soil degradation. Global warming. Climate change. Fluctuating ocean and land temperatures.