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All Journal The Jurnal Arsip Rekayasa Sipil dan Perencanaan (Journal of Archive in Civil Engineering and Planning) Journal of The Civil Engineering Student
Ziana Ziana
Departemen Teknik Sipil, Universitas Syiah Kuala
Civil Engineering, Building, Construction & Architecture Engineering Transportation

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ANALISIS KAVITASI PADA BANGUNAN MERCU PELIMPAH BENDUNGAN KRUENG SABEE MENGUNAKAN MODEL FISIK SKALA 1:30 Cut Dwi Refika; Ziana Ziana; Ikhlasul Amal
Jurnal Arsip Rekayasa Sipil dan Perencanaan Vol 6, No 1 (2023): Jurnal Arsip Rekayasa Sipil dan Perencanaan
Publisher : Prodi Magister Teknik Sipil Unsyiah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jarsp.v6i1.32603

Abstract

The spillway as a complementary building for the dam functions to release a volume of water that is not accommodated in the dam during a flood (overtopping). To support the continuity of the function of the dam, a safety factor is needed to avoid the potential failure of the weir construction. One of the safety of dams is safety against hydraulic failure, namely cavitation. This problem is caused by an increase in the water level from the dam which can cause changes in flow characteristics and result in damage to the spillway overpass building. The characteristics of the flow passing through the spillway will depend on the shape and nature of the crest of the overflow itself. The phenomenon of cavitation can be observed from a physical model of the dam. The physical model was designed according to the construction plan for the Krueng Sabee Dam which was carried out at the River and Beach Laboratory of the Faculty of Engineering, Syiah Kuala University with a model scale of 1: 30. The outflow discharge from the crest of the spillway is discharged with return periods of 2, 5, 10, 25, 50, 100  and 1000 years. The Krueng Sabee Dam, which is located in Aceh Jaya Regency, Aceh Province, is a multi-purpose dam. This research aims to study the cavitation that occurs in the spillway crest according to the planning of the Krueng Sabee Dam using a physical model test. The research analysis method used to calculate the cavitation safety value is the calculation of the cavitation index. The cavitation index value is affected by pressure and flow velocity. The results of the analysis show that the cavitation index value at each measurement point is greater than 1. Based on the results of the analysis of the cavitation index, its show that cavitation does not occur in the spillway crest of the Krueng Sabee Dam at all return periods, so there is no need for surface protection of the spillway crest.
Analisis Permasalahan Saluran Drainase Di Desa Jeumpet Ajuen Kecamatan Darul Imarah Aceh Besar Syaidinulla Alhabib; Ziana Ziana; Cut Dwi Refika; Nina Shaskia
Journal of The Civil Engineering Student Vol 6, No 4 (2024): Volume 6 Nonor 4 Desember 2024
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/journalces.v6i4.31605

Abstract

Floods often hit Aceh Province, especially in Aceh Besar District, Jeumpet Ajuen Village, Darul Imarah District. The main cause of flooding is high rainfall intensity which causes drainage channels to be unable to accommodate water discharge. This study aims to determine the flood discharge, the existing capacity of the channel, and the condition of the drainage channel based on the flood discharge and the existing capacity. The channel under review is the primary channel in Jeumpet Ajuen Village. Primary data was obtained through direct measurement of drainage channel dimensions, while secondary data was in the form of maximum daily rainfall from three rainfall stations in Aceh Besar District. The method used is the modified rational method for hydrological analysis and the HEC-RAS 6.0 application for hydraulic analysis. Data on planned flood discharge and existing dimensions were inputted into HEC-RAS. The discharges entered were discharges with a return period of 5 years and 10 years. HEC-RAS results showed that all review points experienced runoff, especially the left channel with runoff ranging from 0,99 meters to 3,65 meters for a 10-year return period. The existing capacity of the drainage channel is greater than the planned flood discharge, which is Qs = 14,797 m3/det greater than Qt = 9,248 m3/det. However, the existing capacity experiences runoff because the channel discharge is very large for the existing channel dimensions.
Co-Authors Cut Dwi Refika Cut Dwi Refika Ikhlasul Amal Nina Shaskia Syaidinulla Alhabib