assesment of mechanicaloperationson hydrodynamic features of flood

the flood is one of the natural disasters that doesnt create itself but the landuse change will be caused it that makes a lot of human and financial losses every year. in this study in gonbad chi basin to assess the impact of watershed mechanical operation on flood mapping used fuzzy method and ahp method and composition of slope mapping, landuse, permeability and flow accumulation that called base mapping. in next setp by determining thelocation ofmechanicaloperations andseparationofthe operationaccordingto dam height and determine the extent of the effect of the mechanical operation using elevation contour lines, the mapping of impact of watershed management operations was prepared. in the end with composition of base mapping with impact of mechanicaloperations, a new map that called flood mapping is created. although the results have a positiveapproximately9% impact on reducing the risks of flood but these results in a sufficient number of suitable structures would be more effective than showed.