Effect of dredging on hydraulic and reduce flood in downstream river (Case study: Karun River downstream interval between Ahvaz and Farsyat)

Abstract

This study modeled the effects of hydraulic dredging on the lower Karun river in Ahvaz range to the<br />village is Farsyan . using software 4.1 HEC-RAS, one-dimensional model of the flow field was<br />simulated . After entering the information into the model and its calibration based on the selected,<br />design flow model was implemented to extract the water surface elevation levels and spreading areas<br />were measured . The river cross sections have been modified in a way that will solve the problem.<br />Then adjusted based on grades , calculate the approximate volume of dredging and dredging<br />performance optimization strategies were presented . According to the tables referenced in the text, the<br />results indicate that dredging have little effect on the reduction of water surface elevation in the flow<br />with the return period. however, the results indicated an increase in the flow rate of dredging.