Innovation Design Roughness on Slope to Reduce Storms at Curved Seawall in Canggu Beach Bali
Nalarsih1, Yuwono2, Darsono3
1Nalarsih, Department of Civil Engineering, University of Diponegoro, Semarang, Indonesia.
2Nur Yuwono, Department of Civil Engineering, University of Gadjah Mada, Semarang, Indonesia.
3Suseno Darsono, Department of Civil Engineering, University of Diponegoro, Semarang, Indonesia.

Manuscript received on 28 June 2019 | Revised Manuscript received on 05 July 2019 | Manuscript published on 30 July 2019 | PP: 2132-2136 | Volume-8 Issue-9, July 2019 | Retrieval Number: I8084078919/19©BEIESP | DOI: 10.35940/ijitee.I8084.078919

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Abstract: Seawall or revetment has been designed to preserve coastline erosion from waves. The seawall system or revetment could protect againstpowerful wave, reduce hydraulic power in underring material and constribute to wave reflection. The result of survey show that seawall system have to be repeatedly observed to maximize seawall action to produce a modification of seawall design.In this research, hydrodinamic seawall action is conducted by employing its curve, slope and roughness. It is investigated by using physical modeling in 2D Laboratory of Coastal Dynamics Institute Yogyakarta, Indonesia. Type of wave used in this study is Regularwave within one period of time. Wave experiment is examined in 30° of its slope, constant water depth is0.4 m and roughness on its slope using two types of sequential block position and zig zags. This research results in the significant Reflection Coefficient (Kr) which is 0.141 produced by design 1 compared to the previous research is 0.16923. Therefore, it can be concluded that design 1 is more reliable in reducing reflection wave.
Keywords: Seawall, Reflection Coefficient, Slope, Roughness.

Scope of the Article: Web-Based Learning: Innovation and Challenges