عنوان مقاله [English]
In the past 50 years, rising and falling of the Caspian Sea water level, as a part of its normal behavior, destroyed many of agricultural, residential and commercial lands. The current legal frontage of Caspian Sea is expressed buffer of 60 meters from the latest extended point of water level in 1342 based on the given definition in coastal law. According to Caspian Sea water level in the mentioned year (-27.66 meter), 88.87 percent of the Mazandaran province coastline is submerged within the area of this frontage. In this study, to achieve the vulnerability index of Mazandaran province coast area against sea water level fluctuation, five variables were used in two forms of natural and human origins. Regarding with the purpose of the study, the variables include ground elevation changes, slope, coastal landforms, land use and distance from the road. Determine the primary and secondary frontages in Mazandaran Province showed that in the area of 1389 shoreline to a level of -24.7 m (primary frontage), most areas is belonged to natural structures, agriculture and orchard lands. Natural structures have the most area with 8045 hectares which equivalent to 35.7 percent of the primary frontage area. In the secondary vertical frontage (elevation level of -24.7 to -23.5 meters), agricultural lands are dominant with 9644 hectares and have the most area in this front.