Ecosensing of Drought and Wet Condition in Shadegan Wetland Using SPEI Index (Years of 1950-2015)

The international Shadegan wetland is one the biggest ponds in Iran and located in Khouzestan province.This wetland is with more than 530 thousand hectares vast wetland registered in the international Ramsar Convention.Climate changes can make negative or passitive conditions by drought or wet periods on water quality and volume of this wetland.Today, concerns about the warming of the earth and damage to vital natural resources, have led researchers to study different periods of drought. Drought is a phenomenon adverse impact on all ecosystems, including wetlands. Because of it, new drought indices should be associated with specific time scales for monitoring and management of water resources. In the study area, data required by the Metrological Agency, water and power authority and by ocean-atmospheric data from NOAA satellites from 1950 to 2015 (65 years old) received. Changes in wetland on the downside and upside of drought and wet were studied by standardized precipitation evapotranspiration index (SPEI). The final model showed decaying and destroying the wetland each year goes by drought from year of 1998.