Investigation of breakwater on flow pattern and shoreline stabilization in Karoun river Using software (CCHE2D)

Subject Areas : Marine structures

بابک نیک خوی ¹ , امین بردبار ^{2 *}

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Received: 2020-11-13 Accepted : 2021-08-17 Published : 2019-06-01

Keywords: Simulation, شبیه سازی, Erosion, فرسایش, رودخانه, river, CCHE2D, drop, آبشکن,

Abstract :

One of the common methods of controlling river erosion is the use of impermeable culverts. In case of correct design and implementation, in addition to lateral erosion control, it leads to recovery and restoration Lands along rivers. If not implemented correctly and incorrectly designed, it may intensify erosion and destruction of arable soils. Perhaps the most important part of drop design is their location. There is no specific theory for determining the length of drops as well as their distance. In this study flow pattern was simulated around simple drops in the Karoun River between Ahvaz and Khorramshahr within 5 km south of Ahvaz. Installing the breaker in the outer arch due to slowing down Prevents erosion and thus stabilizes the beach. With the increase of discharge from 100 to 2000 cubic meters per second, the flow velocity has increased from 0.17 meters per second to 2.1 meters per second and with the installation of the drop, the flow rate has increased from 0.11 m / s to 0.57 m / s. Also, the shear stress increased from 0.08 N / m2 to 9.36 N / m2 and with the installation of the shear stress breaker, it increased from 0.03 N / m2 to 0.72 N / m2. The results of reducing the flow velocity and shear stress by installing a drop indicate the size of the impact area of the breaker on preventing erosion of the outer arch banks

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