Flood Plain Zoning of Gamasiab River in Different Return Periods

Flood plains rivers are fertile lands that are considered by humans and people are always demanding the development of these areas. Therefore, protection and management of flood plains is essential. In this research, an interval of about 80 kilometer from the Gamasiab River in Kermanshah province was studied. First, using OLI and sentinel sensor for marginal lands classification object oriented method. The results of the verification showed that the sentinel sensor map is more accurate than the OLI sensor. So, to simulate the flood plain, periods 25, 50, and 100 of the sentinel sensor image were used. The results showed that in all periods, more than 95 percent of the extracted areas are related to two waterland fields and dryland fields, because flood plains of the rivers are fertile lands that are considered by humans and humans are always demanding the development of these areas. In addition, residential properties in the 25 period are 2/29 hectare, all of which are riverside villages, Hence, it is necessary that by establishing the rules and implementation of the civil regulations of flood plains, which is one of the direct control mechanisms of land use in these areas, Incorrect use of the land around the river has become its authorized use and the river boundaries have been identified.