Analysis of relation between Lake Urmia's area with meteorological and hydrological droughts using Landsat satellite images
Abstract: Urmia Lake is one of the biggest super saturation of salt Lake of world which its sea level has severely dropped in recent years and its area has decreased, especially in south and south East regions. Many factors effect on these changing in long-term which included rainfall, temperature, the drought, human factors and sunspots. The purpose of present study was to investigate the effect of drought on reduction of Urmia Lake area in recent 45 years. In this study, standard precipitation index of SPI in 3, 6, 12, 24 and 48 scales was used to investigate the drought procedure. The satellite images of Urmia Lake from 1984 to 2012 were processed by remote sensory tests and required calculations were performed to obtain Lakes are. In addition, the lake changing procedures and the drought effects were investigated. The performed studies showed that Urmia lake area has reduced equal to %56 compared with its maximum area during statistical period of 1984 to 2012.Moreover, the relationships between drought procedure changing, level changes and annual volume of inflow to the lake with lake area were identified in present study.