Abstarct: River morphology changes can make several problems in river management such as increasing river bed level, changing water surface profile river flow direction, erosion of the riverbed, widening the river bed and affecting on agricultural land around the river, negative effects on structures built around the river, destruction of vegetation around the river and reduced resistance against flood. Therefore, one of the important and required ways to manage river and reduce costs and possible damage is to consider morphology changes and long-term planning baxsed on these investigations. According to the importance of the issue in this research, morphology changes renge of the Zayandehroud River that is located in the center of Iran was investigated. In this research, range erosion and morphology changes in Zayandehroud River with 11 kilometer length in east of Isfahan in Choum Bridge with Longitude 13-46-51 and latitude 06-35-32 and 1576 height to Golestaneh village investigated using numeric al model CCHE2D. Therefore, maximum and registered annual discharge in hydrometer station in Choum Bridge and Pierson distribution with 5 parameters in the river discharge are calculated with different return period. Then, flow simulation using mapped cross sections with scale 1 to 25000, information related to particles aggregation test in riverbed and determination of Manning roughness coefficient in return periods 5,10,20 and 50 years has been performed. Finally, flow simulation wes performed using CCHE2D model. The results obtained from simulation represents that the flow in return periods 5, 10 and 20 years are subcritical and it is supercritical only in discharge upper 140 m3/s in 50 year return period. Also, speed and shear stress are investigated in four cross sections in interval length which represents speed and shear stress is acceptable in the beginning of interval and basic bends. But in 180 degree bend at the end of interval, speed changes and shear stress and its numeric al value have been very high. By comparing the shear stress with critical shear stress, this result is obtained in which in first interval bend to 20 year return period, no erosion is obtained, but at the end of interval, the discharge in 5 year return period the erosion took plea in outlet bend. In the following, erosion comparison in different sections and return periods has been performed which represents that the most erosion is made in external bend in section 4. Also, morphology changes in related interval has bend performed by studying satellite images in 2002 and 2016. The results of this research represent that in 2002, average curve radius and arc length were 194.45 and 315.4 meter respectively which was changed in 2016 as respectively 190.5 and 336.2 meter. Also, it wes determined by studying center angles that in 2002, 37.5,58.3 and 20.8 percents of bends are undeveloped twist (Pichanrood), developed twist respectively and very developed twist and in 2016, 4.2,20.8,54.28 percent of bends are as undeveloped twist, developed twist and very developed twist respectively which represents the changes in riverbed over the time.