GEOLOGY

Detailed explanation-1: -A drought is defined as “a period of abnormally dry weather sufficiently prolonged for the lack of water to cause serious hydrologic imbalance in the affected area.”-Glossary of Meteorology (1959).

Detailed explanation-2: -Dry patch of lawns occurs when the soil in certain areas becomes water-repellent. As a consequence the grass suffers from severe drought, even in wet weather. The result is the appearance of patches of dead grass, with the soil proving very difficult to re-wet.

Detailed explanation-3: -A drought is a period of time when an area or region experiences below-normal precipitation. The lack of adequate precipitation, either rain or snow, can cause reduced soil moisture or groundwater, diminished stream flow, crop damage, and a general water shortage.

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.