Investigation of Flood Effects on Morphological Changes Using Series of Satellite Pictures (Case study Bazoft River)

Investigating changes in the behavior of rivers is of particular importance in the protection of hydraulic structures and the determination of the boundaries of the river bed, as well as the reduction of possible damages. Dams are among the structures that have the greatest impact on river morphology. Therefore, it is very important to study the morphology of rivers flowing to large dams in planning and ease of strategic decision making on the construction of engineering structures along the river. In recent years, due to the unique characteristics of remote sensing and satellite imagery, many studies have been done to investigate river morphological changes. In this research, the study uses 26 Landsat satellite images to investigate the morphological changes of the Bazoft River between 1985-2015. In this regard, the present study investigates morphological changes of the Basoft River, one of the northern Karun sub basins, which finally enters the Karun 4 dam. In this study, using 26 satellite images of Landsat ETM+ and OLI, the displacement pattern of the main river channel, along with the variations in width and sinousity due to sedimentation and erosion processes in long and short periods up to the year 2015 and caused by large floods in this period were investigated.