The sea level fluctuations effects on geomorphology and morphodynamics of the Caspian Sea Coasts (case study of Gorgan Bay)

The Caspian Sea is the greatest  Lake in the world. It witness substantial fluctuation during the geological time. The study area located in Mazandran  Province at south east of Caspian Sea. In this study effects of  sea level fluctuation on south east of Caspian sea (Miankhaleh spit and  Gorgan Bay) has been studied in detail. The present research is a combination of field investigation, together with  photometry , study of  aerial photos and satellite image interpretations belong to a period of  40 years. The effect of the sea water fluctuation from 1975 to 2014 on the size of Gorgan Bay, sandy Miankhaleh split, along with construction of protective walls, breakwaters, inundation of agriculture land, roads and land use change have been discussed and investigated.