Introduction:   Drought, as a natural disaster, has a major impact on agriculture and ecosystem of the affected region. Droughts occur mainly in areas like Iran being located in the world dry belt, with below normal levels of rainfall.  There is a need to study and predict the drought situation because, according to statistics, Iran is among the most water-stressed countries, with serious probl...

Introduction: Currently, desertification is a catch-up of many countries in the world, including developing countries. This problem is seen not only in dry and semi-arid areas, but also in parts of the semi-humid areas. Desertification involves processes that are both natural causes and human inferiority. Land degradation is referred to as desertification due to one or a combination of processe...