What is agricultural drought

image

Agricultural drought by definition refers to conditions that result in adverse plant responses, which can range from reduced crop and forage yields to total crop or forage failure.


What is agricultural drought in South Africa?

South Africa is highly susceptible to drought impacts on agriculture, given its high water reliance. Drought risk varies substantially between irrigated and rainfed agricultural systems. The most extreme drought for rainfed croplands is observed in Northern Cape, North West and Limpopo.


What is the impact of an agricultural drought?

Drought can stunt the growth of crops, resulting in a decline in the size and quality of produce. Consumers may expect to see higher prices for local food as farmers cope with lower yields and higher expenses. Limited water availability for washing produce may lead to sanitation and health issues for consumers.


What are 4 types of droughts?

Types of DroughtMeteorological Drought. Sequence of drought occurrence and impacts for commonly accepted drought types. … Agricultural Drought. … Hydrological Drought. … Socioeconomic Drought. … Ecological Drought.


Where do we find agricultural drought?

Agricultural drought usually occurs when soil water availability to plants in a specific area has dropped to a level threshold that is insufficient for crop development, growth, and maturation and thus adversely affects the final crop yield Mannocchi et al., 2004 .


What causes an agricultural drought?

Agricultural droughts can occur for various reasons, including low precipitation, the timing of water availability, decreased access to water supplies, or increased water demands from the sector. Responses from the agricultural sector to this type of drought often exacerbate other types of droughts.


How can agricultural drought be triggered by?

Droughts typically begin with a lack of precipitation (meteorological drought), which can be aggravated by increased evapotranspiration owing to high temperatures, which can spread to the land surface and result in reduced soil moisture (agricultural drought) and streamflow (called hydrological drought).


What is the difference between meteorological drought and agricultural drought?

Meteorological drought is defined as a lack of precipitation over a region for a period of time, hydrological drought is defined as a period with inadequate water resources (surface and subsurface), and agricultural drought is usually related to soil moisture and can also lead to crop failure (Mishra and Singh, 2010).


What are the five main types of drought?

Droughts are categorized into four major categories namely agricultural, meteorological, hydrological and socio-economic drought (Wilhite & Glantz 1985). The type of drought depends mainly on the characteristics of drought namely intensity, duration, frequency, and area coverage.


What defines a drought?

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).

Leave a Comment