Sutarto Edhisono
Civil Engineering Department, Faculty Of Engineering, Diponegoro University

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Prediksi Pola Distribusi Sedimentasi Waduk Sepaku Semoi Lina Dwi Damayanti; Dyah Ari Wulandari; Sutarto Edhisono
AGREGAT Vol 7, No 2 (2022)
Publisher : Universitas Muhammadiyah Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/ag.v7i2.14789

Abstract

Proses sedimentasi waduk yang diakibatkan erosi lahan Daerah Tangkapan Air (DTA) waduk maupun longsoran tebing di sekeliling area genangan merupakan permasalahan utama waduk karena dapat menganggu pengoperasian waduk dan mengurangi usia rencana waduk. Pembangunan Bendungan Sepaku Semoi di Kabupaten Penajam Paser Utara menghasilkan efek tampungan normal waduk dengan volume 10,06 juta m3 yang direncanakan sebagai sumber air baku untuk memenuhi kebutuhan Kota Balikpapan dan Kabupaten Penajam Paser Utara serta pengendalian banjir di DAS Sepaku. Waduk Sepaku Semoi yang direncanakan memiliki usia guna 50 tahun dengan tampungan mati 1,06 juta m3 tentu tidak terlepas dari permasalahan sedimentasi, sehingga diperlukan analisis untuk memprediksi besarnya volume sedimen menggunakan pendekatan erosi dan pola distribusi sedimen di seluruh permukaan waduk menggunakan metode empiris pengurangan luas (empirical area reduction method) dalam periode 50 tahun. Berdasarkan hasil analisis, selama periode 50 tahun diperoleh volume total sedimen yang masuk waduk adalah 7,69 juta m3, elevasi nol baru pada +15,78 m dengan kapasitas tampungan normal berkurang menjadi 3,77 juta m3. Hal ini mengindikasikan pengurangan volume yang signifikan sampai akhir usia guna waduk sehingga penanganan permasalahan sedimentasi di Waduk Sepaku Semoi perlu menjadi perhatian.
Analisa Kebutuhan Instrumentasi Geoteknik Dry Dam Bendungan Sawangan Kabupaten Minahasa Utara Farhan Zaky; Hari Nugroho; Sutarto Edhisono
Borneo Engineering : Jurnal Teknik Sipil Volume 7 Nomor 2 Tahun 2023
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Borneo Tarakan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35334/be.v7i2.3661

Abstract

 Located in the downstream watershed, Manado city is at risk of hydrometeorological disasters such as flooding every year, especially in conjunction with high tides. One solution to the city's flooding problem is to provide flood water storage by building the Sawangan dry dam in North Minahasa Regency. In building a dam, dam safety is a very important requirement to minimize disaster risks for the community such as property losses and damage to infrastructure downstream of the dam. Dam safety is highly dependent on the accuracy of planning and during construction. The safety of a dam also depends on the operation stage, the implementation of maintenance, as well as intensive and continuous supervision, monitoring the behavior of the dam and its building facilities. The purpose of the geotechnical instrumentation analysis study of Sawangan Dam in North Minahasa Regency is to determine the ideal geotechnical instrumentation needs in the process of optimal and periodic observation of dam behavior. Geotechnical parameters affect dam behavior due to soil strength related to pore water pressure, water seepage, deformation characteristics of foundation and embankment materials during construction and after construction. Determination of the amount of geotechnical instrumentation installed at Sawangan Dam is based on technical data of the dam dimensions. Based on the analysis conducted, the required geotechnical instrumentation components are; pore water pressure gauges, dam deformation gauges installed inside and outside the embankment, groundwater level gauges, seepage gauges, reservoir water level gauges, and other supporting components. By installing geotechnical instrumentation using telemetry systems or integrated computer systems, data acquisition, management and security are easier.
Penilaian Risiko Bendungan Manggar Dengan Metode Modifikasi ICOLD: Risk Assessment Manggar Dam With Modification ICOLD Method Devi Ismijayanti; Robert J. Kodoatie; Sutarto Edhisono
Media Ilmiah Teknik Sipil Vol. 11 No. 3 (2023): Media Ilmiah Teknik Sipil
Publisher : ​Institute for Researches and Community Services Universitas Muhammadiyah Palangkaraya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33084/mits.v11i3.4699

Abstract

Dam failure has fatal consequences. This is especially true for the infrastructures as well as population settling around the dam. Due to this reason, operation and maintenance of dams should put special care and attention on dam safety. Unfortunately, the budget allocated for dam operation and maintenance for many dams in Indonesia is still very limited. Therefore, it is necessary to determine the priority scale of maintenance or rehabilitation of dams based on its risk classification through a risk assessment. The risk assessment conducted for this research uses the modified ICOLD method. The modified ICOLD method is based on the results of a major inspection conducted in 2019. The results showed that Manggar Dam is categorized as a medium risk dam with a total risk score of 45. Recommended actions to minimize the risk of harm to dam failure included improved operations and maintenance management, improved quality of human resources managing dams, and improved reporting management
Analisa Sebaran Genangan Banjir Akibat Keruntuhan Bendungan Tempuran Waryani, Retno Sri; Sachro, Sri Sangkawati; Edhisono, Sutarto
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 31, Nomor 1, JULI 2025
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/mkts.v31i1.68548

Abstract

The Tempuran Dam is one of the oldest dams in Indonesia and is currently experiencing a lot of damage, which could potentially lead to dam failure such as a dam collapse. To reduce the impact of losses resulting from dam collapses, it is necessary to analyze flood inundation patterns in the context of disaster mitigation. The dam failure analysis was modeled using HEC-RAS software with failure conditions due to overtopping and due to piping. The input in this modeling is the PMF plan discharge which is generated using HEC-HMS modeling with the HSS SCS method. The data required for HEC-HMS modeling are raster maps, land use maps, soil type maps and Hersfield method PMP rainfall plans. From the analysis results, it was found that the PMF planned flood was 115.54 m3/sec. The area of the flood inundation due to the collapse of the Tempuran Dam, the bottom piping condition was 2.61 km2 and the depth of the flood varied between 0 m to 3 m, where the area most deeply affected by the inundation was Purwosari Village, Blora Kota District. From the mapping results, the areas affected by flood inundation due to the collapse of the Tempuran Dam are Tempuran Village, Sendangharjo Village, Ngadipurwo Village, Purwosari Village, Patalan Village and Tempurejo Village. Where the fastest flood travel time is 48 minutes to Tempuran Village and the longest flood travel time is 5.25 hours to Tempurejo Village.