The different categories of droughts have different causes but similar effects: Meteorological drought occurs when there is a prolonged time with less than average precipitation. Meteorological drought usually precedes the other kinds of drought. As a drought persists, the conditions surrounding it gradually worsen and its impact on the local population gradually increases. Hydrological drought happens when water reserves available in sources such as aquifers, lakes and reservoirs fall below average or a locally significant threshold. Hydrological drought tends to present more slowly because it involves stored water that is used but not replenished. Due to the close interaction with water use, this type of drought is can be heavily influenced by water management. Both positive and negative human influences have been discovered and strategic water management strategies seem key to mitigate drought impact. Like agricultural droughts, hydrological droughts can be triggered by more than just a loss of rainfall. For instance, around 2007 Kazakhstan was awarded a large amount of money by the World Bank to restore water that had been diverted to other nations from the Aral Sea under Soviet rule. Similar circumstances also place their largest lake, Balkhash, at risk of completely drying out. Agricultural or ecological droughts affect crop production or ecosystems in general. This condition can also arise independently from any change in precipitation levels when either increased irrigation or soil conditions and erosion triggered by poorly planned agricultural endeavors cause a shortfall in water available to the crops.
the different categories of droughts have different causes but similar effects meteorological drought occurs when there is a prolonged time with less than average precipitation meteorological drought usually precedes the other kinds of drought as a drought persists the conditions surrounding it gradually worsen and its impact on the local population gradually increases hydrological drought happens when water reserves available in sources such as aquifers lakes and reservoirs fall below average or a locally significant threshold hydrological drought tends to present more slowly because it involves stored water that is used but not replenished due to the close interaction with water use this type of drought is can be heavily influenced by water management both positive and negative human influences have been discovered and strategic water management strategies seem key to mitigate drought impact like agricultural droughts hydrological droughts can be triggered by more than just a loss of rainfall for instance around 2007 kazakhstan was awarded a large amount of money by the world bank to restore water that had been diverted to other nations from the aral sea under soviet rule similar circumstances also place their largest lake balkhash at risk of completely drying out agricultural or ecological droughts affect crop production or ecosystems in general this condition can also arise independently from any change in precipitation levels when either increased irrigation or soil conditions and erosion triggered by poorly planned agricultural endeavors cause a shortfall in water available to the crops