Drought

*Climate variabilies

*Anthropogenic effects

*They have extensive impact on humans beings,enviroment,water resources and agriculture

Is a event of prolonged shortages in the water supply.A drought can last for months or years or 15 days and it can have a substantial impact on the ecosystem and agriculture of the affected region.

In rivers the ecological effects of drought typically result in gradual adjustments of invertebrate community structure and functioning

Wetted channel margins,become dewatered and dry

In 2017-18 the crops have withered and the ranchers are culling herds after an unusually dry growing season.

Argentina was in one of the main countries of the world soybean and corn producers