Application of Geomorphic River Recovery in River Management Case Study:Northen Alborz, LavijRud Catchment

Rivers have a complicated، various condition in the diverse environment as studied by hydrology، geomorphology، hydraulics، ecology and engineering. River geomorphology studies the river process and landforms and examines the evolution of the river''s landscape، which can play an important role in identifying river channel characteristics and behavior. Designs with river engineering enable precise examinations of rivers leading to declines in property damage. In this study we initially determined the type of river style. Then، with three degrees of freedom، the channel morphology، plan form، river bed characteristics، capacity for adjustment، and relevant geoindicators for each degree of freedom for each river style were determined. Next، we interpreted the river''s evolution by using ergodic reason to assess whether irreversible geomorphic change occurred. The geomorphic recovery potential of each reach was determined by assessing the connectivity of the reaches and interpreting limiting factors and pressures. In the LavijRud catchment eight river styleswere identified. More steep headwaters have intact condition and gorges، low sinuosity planform with discontinuous floodplain and high energy with gravel bed river styles have a high river recovery potential. Cut-fill، bedrock controlled with discontinuous floodplain and confined with occasional pocket floodplain river styles have moderate river recovery potential. Confined with slump bank river style have a low river recovery potential and their conditions are degraded. Results show that river styles in this catchment also have respectively 65% high، 28% moderate and 7% low river recovery potential. Management prioritization of each river style observed the river''s geomorphic conditions and recovery potential.