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All Journal MEDIA KOMUNIKASI TEKNIK SIPIL Journal of Innovation and Applied Technology Jurnal Teknik Pengairan: Journal of Water Resources Engineering Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Teknika Jurnal Pengabdian Masyarakat untuk Negeri (UN-PENMAS) Jurnal Teknik Sumber Daya Air Jurnal Teknologi dan Rekayasa Sumber Daya Air Geosfera Indonesia
M. Amar Sajali
Teknik Pengairan Fakultas Teknik Universitas Brawijaya
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Physics Social Sciences Other

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Journal : Jurnal Teknik Pengairan: Journal of Water Resources Engineering

 1 
Uji Model Fisik Bangunan Pelimpah Bendungan Saka Gilas Dengan Skala 1:50 Rahmah Dara Lufira; Muhammad Amar Sajali; Suwanto Marsudi; Very Dermawan
Jurnal Teknik Pengairan: Journal of Water Resources Engineering Vol. 10 No. 1 (2019)
Publisher : Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (658.486 KB) | DOI: 10.21776/ub.pengairan.2019.010.01.7

Abstract

The physical hydraulic model carried out in the laboratory is intended to determine the hydraulic behavior of the flow in hydraulic structures. The aim of Hydraulic model test of Sakagilas Dam spillway is to determine the flow profile that occurs in spillway system, including flow depth, velocity, water flow pressure, and Froude numbers. Also to find out the hydraulic performance of side spillway design, transition channel, chute way channel, energy dissipator, and escape channel. Investigation of water flow pressure in the spillway system (side channel spillway, transition channel, and especially chute way channel) was measured and analyzed to determine the condition of structure safety against cavitation and vibration flow.The spillway of Saka Gilas Dam is a side channel spillway (Fixed+Gated) with an Ogee spillway. The shape of the side spillway is circular quarter circle (45⁰). Preliminary observations on the physical model test are carried out under the condition of Original Design, which if there is a poor flow hydraulic behavior, design modifications will be made. The design modification is intended to get the best flow hydraulic behavior, according to the standard design criteria for the side channel spillway system.
Analisa Safety Factor Sheet Pile Pada PLTMG Pontianak Peaker Dengan Aplikasi Geo5 Muhammad Amar Sajali; Rahmah Dara Lufira; Suwanto Marsudi; Aufa Hanan A
Jurnal Teknik Pengairan: Journal of Water Resources Engineering Vol. 10 No. 2 (2019)
Publisher : Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1406.536 KB) | DOI: 10.21776/ub.pengairan.2019.010.02.01

Abstract

In the past decade, the development of land retaining construction is growing rapidly as optimization of available land use. The purpose of this study is to hold the soil in order to avoid landslide due to the structural load other than the use of available space. The results of the sheet pile analysis at Pontianak Peaker PLTMG found that the SF number in the condition without earthquake (safe condition) is 2.00 and the number of SF in earthquake conditions is 1.40. Based on the results of sheet pile analysis at S-02 and S-03 points in conditions without earthquakes, low tide-without earthquakes, floods-without earthquakes, normal-earthquakes, receding earthquakes, and earthquake floods with earthquakes returning 500 years in analysis the structure and analysis of slope stability are said to be "safe" because the conditions without earthquakes SF values greater than 2.00 and earthquake conditions SF values greater than 1.40.
Reproduction and Characterization of Sedimentation Phenomena in Tanjung Perak Port through Numerical Simulation Using Delft3D Camila, Adristi Nur; Murakami, Keisuke; Sajali, M. Amar; Haribowo , Riyanto
Jurnal Teknik Pengairan: Journal of Water Resources Engineering Vol. 16 No. 1 (2025)
Publisher : Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.pengairan.2025.016.01.7

Abstract

Tanjung Perak Port in Surabaya, one of the biggest ports in Indonesia, faces significant sedimentation problems that can affect operational capacity. This research aims to investigate these sedimentation problems using a 3-dimensional numerical model with Delft3D software, analyzing wave, tidal, and topographic changes to recommend effective sediment management. This research focuses on Tanjung Perak Harbor in Surabaya, Indonesia, using Delft3D numerical modeling to analyze sedimentation phenomena and examine topography, tidal, wave, and sediment characteristics, and river inflow data from the Mas River and Lamong Rivers. This research divides the depth into three layers with the smallest grid size dx= 10 m and dy= 10 m. Sediment diameter data, used in this simulation with an average grain size (D50) of 0.28 mm from inside the port, will be simulated simultaneously with tidal and wave motion. This simulation is for 1 month using a scale factor of 12, making the simulation equal to 1 year. From the simulation results, the effect of wave movement is relatively small. At 3 locations in the Tanjung Perak port area, sedimentation with an average change in depth of 0.8 m/year was caused by sedimentation carried from the Lamon River and Mas River. Therefore, dredging recommendations are conducted to reduce sedimentation in the port area by constructing a jetty at the mouth of the Mas River. The results showed that the average depth increase changed to 0.4 m/year after the jetty was built, but some erosion occurred around the jetty, 0.0056 m/year.
Assessing Liquefaction Risk at Timika Steam Power Plant through Cyclic Stress Ratio Analysis Using Borehole Data Marsudi, Suwanto; Lufira, Rahmah Dara; Sajali, Muhammad Amar; Putra, Sebrian Bessely Mirdeklis; Asmaranto, Runi; Prasetyorini, Linda
Jurnal Teknik Pengairan: Journal of Water Resources Engineering Vol. 16 No. 1 (2025)
Publisher : Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.pengairan.2025.016.01.9

Abstract

Energy infrastructure, particularly power plants, is critical in national and regional development. This study aims to determine the optimal placement and design of the Timika PLTU (power plant) by conducting comprehensive soil and rock investigations, focusing on seismic risks. The primary objective is to assess the geotechnical conditions of the site to ensure structural stability and safety in this high-seismicity zone. Key methods used in this study include borehole drilling, soil classification tests, and seismic hazard analysis. The soil at the site is classified as medium (SD) with Vs values ranging from 175 to 350 m/sec, and the seismic zone’s coefficient (Z) is 0.6, indicating significant seismic potential. The results reveal that specific design measures, such as sheet piles and retaining walls, are necessary to mitigate the risks of lateral collapse in areas with significant soil excavation. Furthermore, seismic design considerations were incorporated to improve the plant’s earthquake resistance. The findings of this study provide essential geotechnical data and practical recommendations, ensuring the safe and resilient construction of the PLTU Timika in a region prone to seismic activity while guiding future infrastructure projects in similar high-risk zones.
Co-Authors Abi Aulia Yanottama Aditama, Dimas Hafiz Anggara Wiyono Wit Saputra, Anggara Wiyono Wit Aufa Hanan A Beselly Putra, Sebrian Mirdeklis Camila, Adristi Nur Dewanti, Wahyuning Dian Sisinggih Dian Sisinggih Dian Sisinggih Donny Harisuseno Donny Harisuseno Donny Harisuseno Ery Suhartanto Evi Nur Cahya Faiz Muflih Hadi, rafli mas Haribowo , Riyanto Haribwowo, Riyanto Hidayat, Mustafa Mukti Indriana Vaninda Karin Irsam, Ramadhanti Mutiara Keisuke Murakami Laksono Trisnantoro Linda Prasetyorini Linda Prasetyorini Moch Rizky Sya'bana Mohammad Dahlan Firmansyah Muchammad Zidan Muh. Rivan Saranani Muhammad Fahmi - Muhammad Ridho Abdillah Narendra, Narendra Agung Setya Virgosa Otta, Rhea Rachma Pitojo Tri Juwono Pitojo Tri Juwono R. Haryo Briantama Rahawarin, Ridho Fahreza Rahmad Aziz Saputra Rahmah Dara Lufira Reza Andrean Riyadi, Bagus Riyanto Haribowo Riyanto Haribowo Runi Asmaranto Setiyowati, Yunita Ayu Sofriansyah, Rafi Satria Sumiadi Sumiadi, Sumiadi Suwanto Marsudi Ussy Andawayanti Utami, Rizki Tri Very Dermawan Very Dermawan Wibowo, Hindrawan Tri Winnie Meilinda Dewi