1. Study of physical modeling and empirical bed changes in single meandering river by developing shortcut.
- Author
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Prawito, Adi, Suhardjono, Masrevaniah, Aniek, and Suharyanto, Agus
- Subjects
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MEANDERING rivers , *BED load , *SEDIMENT control , *RIVER channels , *SEDIMENT transport , *SEDIMENT analysis - Abstract
River handling by developing shortcut causes a lot of new problems. To determine the changes in the river bed that occur in a single meandering river with the angle of 90 by developing shortcut, a study was carried out covering hydraulic behavior and sedimentation characteristic. Physical and empirical modeling in this study were carried out with smooth sand bed material. Flow discharge that enters to the model used with various input discharge, that is Q=2.183 lt/s, Q=2.997 lt/s, Q=3.891 lt/s, Q=4.858 lt/s and Q=5.893 lt/s. After running the physical model, analysis of the calculation of sediment volume at the control point were carried out using the MPM method (Meyer-Peter and Muller). The results of physical modeling, shortcut development is very influential to lowering river water surface. The sediment control at bends and shortcut show the same trend between the physical model and the MPM empirical calculation, that is, at the bend there is a sediment derivation from the first flow test, then in the test there is an escalation in sediment transport. Whereas in the shortcut, there was an escalation in sediment from the first flow test, then in the next flow test there was a derivation in sediment even though the discharge was increased. From the comparison of the bed load transport's value, there is a significant difference between the physical modeling and the MPM empirical method. So, the MPM formula is modified, so that the results obtained are closer to the physical model. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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