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All Journal International Journal of Renewable Energy Development Jurnal Teknik Sipil
Andi Egon, Andi
Alumni Prodi Teknik Sipil FTSL-ITB.
Chemistry Civil Engineering, Building, Construction & Architecture Energy

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Perbandingan Beberapa Formula Perhitungan Gerusan di Sekitar Pilar (Kajian Laboratorium) Soeharno, Agung Wiyono Hadi; Soekarno, Indratmo; Egon, Andi
Jurnal Teknik Sipil Vol 13, No 1 (2006)
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (742.374 KB)

Abstract

Abstrak. Sungai adalah salah satu sumberdaya air yang penting bagi kehidupan. Alur sungai ada yang lurus dan ada pula yang berkelok-kelok. Sarana transportasi jalan yang melintasi sungai memerlukan jembatan. Pada jembatan dengan bentang yang relatif lebar, umumnya memerlukan struktur pilar untuk menopangnya. Pilar yang ditanam pada dasar sungai memerlukan kriteria disain sedemikian sehingga bila dasar saluran disekitar pilar jembatan tersebut tergerus, maka gerusan tersebut tidak mencapai kedalaman yang membahayakan kestabilan pilar. Dalam penelitian ini, model pilar dibangun pada model sungai di Laboratorium Uji Model Fisik Hidraulik, Fakultas Tehnik Sipil dan Lingkungan ITB. Kedalaman gerusan lokal yang terjadi pada model diamati untuk berbagai aliran debit yang berbeda. Hasil pengamatan yang didapat dibandingkan dengan hasil hitungan dari beberapa formula. Formula Colorado State University (CSU) adalah formula yang paling mendekati hasil pengamatan.Abstract. River is water resources, which is important for humankind. The morphology of the river might to be straight or to be meander. A highway that cross a river needs a bridge. In the wide river, the bridge needs pillars to support it. Pillars that construct in the river need to have design criteria so that erosion that might be happened would not cause the pillars to be unstable. In this research, models of pillars in the river model were constructed in the Hydraulic Laboratory, Civil Engineering Departement ITB. Local Scours of the pillars were examined in the various discharges.The results were compared with several methods. The method of Colorado State University (CSU) is recomended in calculating the depth of the local scour in the reseach model condition.
Model Hidrodinamika Pasang Surut di Perairan Kepulauan Bangka Belitung Radjawane, Ivonne M.; Saputro, Bagus S.C.; Egon, Andi
Jurnal Teknik Sipil Vol 25, No 2 (2018)
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2123.24 KB) | DOI: 10.5614/jts.2018.25.2.5

Abstract

AbstrakDinamika pasang surut di perairan Kepulauan Bangka Belitung dipengaruhi oleh pasang surut (pasut) dari Laut Cina Selatan dari sebelah utara dan Laut Jawa di sebelah selatan, selain itu terdapat juga pengaruh proses lokal akibat perairan dangkal dan selat sempit. Untuk mengetahui pola dan dinamika pasut yang di perairan Bangka Belitung, dilakukan simulasi model numerik delapan komponen pasut (M2, S2, K1, O1, N2, P1, K2, dan Q1) selama 14 hari (4 - 17 Januari 2009). Simulasi menggunakan model DHI MIKE21 Flow FM, yaitu model hidrodinamika dua dimensi horisontal dengan skema mesh fleksibel. Syarat batas model diperoleh dari Oregon State University Tidal Inversion Software (OTIS) yang dikenal sebagai program Tidal Model Driver (TMD. Hasil dari simulasi model divalidasi terhadap data lapangan pada enam stasiun Babel Ocean Observation and Technologies (BOOST) Center. Hasil simulasi model menunjukkan bahwa pola pasang surut di perairan Kepulauan Bangka Belitung didominasi oleh tipe harian tunggal (diurnal) dengan komponen pasang surut K1 yang terbesar kemudian diikuti oleh komponen O1. Hasil simulasi model juga menunjukkan bahwa dinamika pasang surut pada perairan Bangka Belitung dipengaruhi oleh dinamika Laut Cina Selatan yang memiliki pola pasang surut harian tunggal (diurnal), dimana komponen terbesar K1 terdispersi dari Laut Cina Selatan menuju Selat Karimata dan perairan Bangka Belitung.AbstractTidal dynamics in Bangka Belitung Archipelago waters is influenced by the tidal from South China Sea from the north, the Java Sea from the south, and local processes due to shallow water and narrow strait. To understand the tidal dynamics in Bangka Belitung waters, a numerical model has been simulated with 8 major tidal constituents (M2, S2, K1, O1, N2, P1, K2, and Q1) for a period of 14 days (4 to 17 January 2009). The simulation was carried out using DHI’s MIKE 21 Flow FM software, a 2-dimension flexible mesh hydrodynamic model. The model boundary conditions were obtained from the Oregon State University Tidal Inversion Software (OTIS), also known as the Tidal Model Driver (TMD). The model has been validated against measurement in six stations of BOOST Center (Babel Ocean Observation and Technologies). The simulation results show that the tidal dynamic in Bangka Belitung waters is dominated by diurnal tidal constituent, with K1 is the largest tidal constituent then followed by O1. The result also indicates that the tidal dynamic in Bangka Belitung waters is dominated influenced by the diurnal constituents K1 coming from the South China Sea dispersed towards the Karimata Strait and Bangka Belitung water.  
Tidal Current Energy Resources Assessment in the Patinti Strait, Indonesia Novico, Franto; Sudjono, Evi Hadrijantie; Egon, Andi; Menier, David; Methew, Manoj; Pratama, Munawir Bintang
International Journal of Renewable Energy Development Vol 10, No 3 (2021): August 2021
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.2021.35003

Abstract

Indonesia is currently intensively developing its renewable energy resource and targets at least 23% by 2025. As an archipelago country, Indonesia has the potential to benefit from its abundant renewable energy resources from its offshore regions. However, the short tidal range of mixed semi-diurnal and the suitable tidal turbine capacity may hinder marine renewable energy development in Indonesian waters. This paper presents higher-order hydrodynamic numerical models to provide spatial information for tidal current resource assessment of the Patinti Strait. The present study applied the hydrographic and oceanographic method to produce input of the numerical model. Based on the selected simulation analysis, the highest current speed could be identified around Sabatang and Saleh Kecil Island with up to 2.5 m/s in P1 and 1.7 m/s in P4. Besides, the operational hours for the two observation points are 69% and 74.5%, respectively. The results indicate that this location is of prime interest for tidal turbine implementation as an energy source, for medium capacity (300 kW) and high capacity (1 MW).
Co-Authors Agung Wiyono Hadi Soeharno, Agung Wiyono Hadi Franto Novico Indratmo Soekarno Ivonne M. Radjawane Menier, David Methew, Manoj Pratama, Munawir Bintang Saputro, Bagus S.C. Sudjono, Evi Hadrijantie