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All Journal Rekayasa Sipil RACIC : Rab Construction Research Borneo Engineering: Jurnal Teknik Sipil Jurnal Ekonomi
Ignatius Sriyana
Universitas Diponegoro
Civil Engineering, Building, Construction & Architecture Economics, Econometrics & Finance

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Analisis Probabilitas Kegagalan Bendungan Pacal Menggunakan Metode Event Tree Analysis Andrean Rahady Juanizar; Suripin Suripin; Ignatius Sriyana; Suprapto Suprapto
Borneo Engineering : Jurnal Teknik Sipil Volume 6 Nomor 2 Tahun 2022
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Borneo Tarakan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35334/be.v1i2.2652

Abstract

Kegagalan bendungan merupakan suatu bencana besar yang dapat menimbulkan kerugian besar dan dapat menimbulkan korban jiwa. Usaha dalam mengidentifikasi kemungkinan kegagalan bendungan dapat dilakukan dengan analisis risiko kegagalan bendungan. Pada penelitian ini, dilakukan analisis risiko untuk menentukan nilai probabilitas kegagalan tahunan pada Bendungan Pacal yang terletak di Kabupaten Bojonegoro. Analisis dilakukan dengan menginventarisasi seluruh mode kegagalan yang mungkin terjadi berdasarkan laporan inspeksi besar yang dilaksanakan di bendungan. Setiap potensi bahaya yang ada dilakukan perhitungan perkiraan risiko dengan menggunakan metode FMECA. Terhadap seluruh potensi bahaya yang memiliki nilai risiko dan kekritisan yang tinggi, dilakukan analisis risiko menggunakan metode pohon kejadian (event tree) sehingga diketahui proses kejadian yang mungkin terjadi. Hasil analisis yaitu probabilitas kumulatif dari beberapa potensi bahaya kegagalan Bendungan Pacal adalah sebesar:  1,29 x 10-5. Probabilitas kegagalan bendungan tertinggi yaitu pada potensi bahaya deformasi tubuh bendungan. Status risiko Bendungan Pacal berada dalam "batas yang ditoleransi untuk bendungan eksisting". Untuk mengurangi risiko bahaya kegagalan bendungan, direkomendasikan untuk dilakukan analisis deformasi lebih lanjut dan dilakukan penanganan pada keretakan pada plat beton untuk menghindari terjadinya perluasan keretakan.
Nilai Indeks Kesiapan Program Modernisasi Irigasi pada Daerah Irigasi Sucen Jawa Tengah Melfina Roselyn; Ignatius Sriyana
Rekayasa Sipil Vol. 17 No. 2 (2023): Rekayasa Sipil Vol. 17 No. 2
Publisher : Department of Civil Engineering, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rekayasasipil.2023.017.02.13

Abstract

Modernization of irrigation systems plays a huge role in realizing a participatory irrigation management system oriented towards efficiency, effectivity, and sustainability of irrigation systems to support food and water security. This study aims to evaluate the modernization readiness of the Sucen Irrigation, referring to the five pillars of irrigation modernization as measured by the readiness index score (IKMI). The method used in this research is direct observation and interviews. The result from this study shows that Sucen Irrigation Area got a moderate category with a total score of 63.5 which the result for each pillar is 14.8 of the IKMI score for Water Availability, 17 for Irrigation Facilities and Infrastructure, 10.6 for the Irrigation Management System, 14.2 for Institutional Management, and 6.9 for the last pillar which is Human Resources Management. Therefore, the moderate category points to modernization should be postponed to improve the irrigation system within 1-2 years.
MANGGAR DAM RISK ASSESSMENT BASED ON THE ANDERSEN MODIFICATION METHOD Yudha Pratama Narra Putra; Ignatius Sriyana; Suprapto Suprapto
Jurnal Ekonomi Vol. 12 No. 3 (2023): Jurnal Ekonomi, 2023, September
Publisher : SEAN Institute

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Abstract

Dams are massive water structures built for a spesific purpose, usually used for irrigation, raw water, flood control, and hydropower. Besides having great benefits also have the potential for failure as well. With such a large failure potential, the dam must continue to be monitored and maintained by carrying out Routine Operation and Maintenance activities. With the data obtained during the operation and Maintenance activites, we can anticipate the potential dam failure by conducting a Risk Assessment. Risk Assessment is used to determine repair and rehabilitation priorities that are balanced with budget availability and restore the service function of the dam. Manggar Dam is a dam that built by damming the Manngar Besar River. The Manggar Dam is located on the Manggar Besar River under the River Basin Unit (BWS) Kalimantan III in East Kalimantan Province. The method used in this research is Modified Andersen, wich is based on technical characteristics, safety plans, and the existing conditions of the dam. Using Inspection data that BWS Kalimantan III and Dam Office get. With visual inspections in the field, results of major inspection reports, and other technical documents. The results of this study indicate that the Manggar Dam is an old dam that has been repaired and built to enlarge its capacity. With the Andersen Modification method, the Manggar Dam gets a Total Risk Index Score (IRtot) of 19, wich means that the dam is in good condition and has a low risk of failure. There are only a few improvements that need to be made.
EVALUASI KEMAMPUAN BENDUNGAN JLANTAH DALAM MEREDUKSI BANJIR Siti Robiatul Adawiyah; Ignatius Sriyana; Suharyanto Suharyanto
Racic : Rab Construction Research Vol. 9 No. 2 (2024): DESEMBER
Publisher : LPPM Universitas Abdurrab

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36341/racic.v9i2.4914

Abstract

The Jlantah Dam is a multi-purpose dam that was built in 2019. Besides the benefits, the dam also has potential danger if it floods and cause overtopping. Flood discharge is influenced by rainfall and land cover conditions. BMKG noted that the La Nina phenomenon occurred in 2020 – 2022 which had an impact on increasing rain intensity. Apart from that, from 2017 – 2023 there has been a change in land cover in the Jlantah Dam catchmen area. This research aims to analyze flood discharge at Jlantah Dam with current rain conditions and land cover and evaluate the safety of the dam against overtopping through HEC-HMS flood routing. The results of the HEC-HMS flood discharge analysis show that there is an increase in average flood discharge of ± 3,27% from the 2017 study. Based on the results of the flood routing, the dam's freeboard at discharge return periods 2, 5, 10, 25, 50, 100, 1000 years, and PMF respectively: 4,2 m; 3,9m; 3,8m; 3,5m; 3,3m; 3m; 2,6m; and 0,9m. At the PMF discharge there was a decrease in the freeboard of 0,35 m from the 2017 study but it remained safe against overtopping. The flood reduction at return periods 2, 5, 10, 25, 50, 100, 1000 years, and PMF respectively: 33%; 33%; 32%; 30%; 29%; 26%; 24%; and 17%.
Co-Authors Andrean Rahady Juanizar Melfina Roselyn S. Suripin Siti Robiatul Adawiyah Suharyanto Suharyanto Suprapto Suprapto Suprapto Suprapto Yudha Pratama Narra Putra