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All Journal TEKNIK MEDIA KOMUNIKASI TEKNIK SIPIL Jurnal Teknik Sipil JURNAL KARYA TEKNIK SIPIL Jurnal Teknik Sipil dan Perencanaan REKAYASA Jurnal Teknik Sipil Rang Teknik Journal Al Qalam: Jurnal Ilmiah Keagamaan dan Kemasyarakatan Jurnal Rekayasa Sipil Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Borneo Engineering: Jurnal Teknik Sipil JURNAL TEKNIK HIDRAULIK Journal La Multiapp International Journal of Social Service and Research Eduvest - Journal of Universal Studies
Sri Sangkawati Sachro
Departemen T. Sipil FT. UNDIP Jl. Prof. H. Soedarto SH., Tembalang, Semarang 50275
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Electrical & Electronics Engineering Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Neuroscience Physics Social Sciences Transportation

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Analisa Sebaran Genangan Banjir Akibat Keruntuhan Bendungan Tempuran Waryani, Retno Sri; Sachro, Sri Sangkawati; Edhisono, Sutarto
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 31, Nomor 1 (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.
Risk Assessment Of Gonggang Dam In Magetan District, East Java Province Khaidir, Trifad Mochammad; Sangkawati, Sri; Sriyana, Sriyana
Eduvest - Journal of Universal Studies Vol. 4 No. 11 (2024): Journal Eduvest - Journal of Universal Studies
Publisher : Green Publisher Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59188/eduvest.v4i11.44757

Abstract

This study aims to assess the safety risk of the Gonggang Dam located in Magetan Regency, East Java, using traditional methods and the event tree method (Event Tree Analysis). The risk assessment is conducted by identifying potential hazards and failure modes, estimating the probability of failure, and evaluating the level of risk based on the analysis results. The results of the analysis show that the event tree method provides acceptable risk results, while the traditional method shows unacceptable risks. The priority of risk management at Gonggang Dam is focused on monitoring the dam body and inundation area to maintain safety and maximize the life of the dam. Recommendations were given to improve structural safety and regular monitoring.
Analisis Rembesan Bendungan Karian menggunakan Piezometer dan V-notch pada Fase Impounding Rohman, Fauji; Sachro, Sri Sangkawati; Nugroho, Hari
Jurnal Rekayasa Sipil (JRS-Unand) Vol. 21 No. 3 (2025)
Publisher : Civil Engineering Departement, Andalas University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrs.21.3.141-154.2025

Abstract

Infiltrasi air melalui tubuh serta fondasi bendungan merupakan penyebab utama keruntuhan struktur hidraulik dengan kontribusi global mencapai 43 persen. Studi ini meneliti karakteristik aliran air bawah tanah di Bendungan Karian selama fase pengisian awal waduk, mulai September 2023 hingga Mei 2025. Pendekatan penelitian mengombinasikan pengukuran debit secara langsung menggunakan ambang V-notch triangular weir dan analisis tekanan air pori melalui data vibrating wire piezometer. Proses seleksi data diterapkan untuk meniadakan pengaruh aliran permukaan akibat curah hujan. Hasilnya menunjukkan korelasi eksponensial tinggi (R = 0.9428) antara ketinggian muka air dengan debit keluar sistem drainase toe, mengikuti persamaan y = 0.1852x - 4.425. Debit v-notch meningkat dari 1.40 menjadi 8.04 liter/detik sepanjang periode pengamatan. Analisis spasial piezometer memperlihatkan variasi tekanan air di zona inti dengan koefisien korelasi 0.3817–0.9611 bergantung elevasi dan lokasi. Validasi silang antara pengukuran langsung dan estimasi gradien hidrolik menghasilkan R = 0.9184, menegaskan kesesuaian antarperangkat. Secara keseluruhan, kondisi hidraulik Bendungan Karian masih aman namun sistem drainase memerlukan optimalisasi serta pemantauan lanjutan hingga tercapai kestabilan aliran penuh.
Geological Investigation and Treatment of the Cabean Dam Foundation Rachman, Muhammad Perwira; Sangkawati, Sri; Sriyana, Ignatius; Kurniawan, Yudi
Journal La Multiapp Vol. 7 No. 2 (2026): Journal La Multiapp
Publisher : Newinera Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37899/journallamultiapp.v7i2.3077

Abstract

Embankment dams are critical infrastructure requiring comprehensive geological and geotechnical investigation to ensure long-term structural integrity and prevent catastrophic failure. This study presents the results of two-stage Multichannel Analysis of Surface Waves (MASW) investigations conducted at Cabean Dam core zone to characterize shear wave velocity (Vs) profiles and identify weak zones susceptible to seepage and slope instability. The first stage (2022) involved 17 survey lines while the second stage (2025) comprised 11 additional lines targeting critical areas. Shear wave velocity values ranged from 78–756 m/s, indicating significant material heterogeneity. Low Vs anomalies (78–200 m/s) were identified in the upper 0–7 meter depth at survey lines L-01, L-07, L-08, and L-09, correlating with residual soil having high permeability values up to 3.06×10⁻⁴ m/s and Lugeon values reaching 25.34 Lu. Integration of MASW data with borehole logs confirmed material classifications ranging from Site Class E (soft soil) at shallow depths to Site Class B (stiff soil) at greater depths. The identified weak zones pose significant risks for seepage, internal erosion (piping), and slope instability, requiring remedial measures including recompaction, optimized internal drainage design, and enhanced instrumentation monitoring. This research contributes methodological advancement in applying MASW as an integral component of staged investigation protocols for embankment dam projects, particularly for monitoring and refining geological-geotechnical conditions during construction phase. Results serve as a reference for practitioners and researchers in geotechnical dam engineering for improving safety and reliability of embankment dam infrastructure in Indonesia.
Limit Equilibrium Analysis of Slope Reinforcement Under Varying Pore Pressure: A Case Study of Cabean Dam Conduit Channel Rachman, Muhammad Perwira; Sangkawati, Sri; Sriyana, Ignatius
Jurnal Teknik Sipil Vol 26, No 1 (2026): Jurnal Teknik Sipil Universitas Tanjungpura
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jts.v26i1.104448

Abstract

Slope instability induced by rainfall infiltration and increasing pore-water pressure is a common geotechnical problem in tropical regions. This study evaluates the effectiveness of slope-reinforcement methods applied to the conduit channel slope at Cabean Dam, Central Java, Indonesia. Stability analysis was conducted using three limit-equilibrium methods—Ordinary, Bishop Simplified, and Morgenstern–Price—implemented in SLOPE/W. Three slope conditions were analyzed: the original slope configuration, slope flattening combined with soil nail reinforcement, and slope flattening combined with shotcrete treatment. A sensitivity analysis was performed by varying the pore pressure ratio (Ru) from 0.0 to 0.7 to represent different rainfall infiltration conditions. The results indicate that the initial slope condition is unstable, with safety factors below acceptable engineering standards. Soil nail reinforcement significantly improves slope stability but remains sensitive to increasing pore pressure. The combination of slope flattening and shotcrete treatment provides the highest safety factors and the lowest sensitivity to pore-pressure variations, indicating better performance for slope stabilization in high-rainfall environments.
Potensi Erosi Buluh Akibat Mata Air Pada Bendungan (Studi Kasus : Bendungan Titab) Anggara, I Putu Hariawan; Sachro, Sri Sangkawati; Putranto, Thomas Triadi
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 27, Nomor 2 (2021)
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (779.077 KB) | DOI: 10.14710/mkts.v27i2.40192

Abstract

Bendungan merupakan salah satu infrastruktur keairan yang dapat difungsikan sebagai konservasi,pemanfaatan, dan pengendalian daya rusak air. Bendungan Titab merupakan salah satu bendungan diIndonesia yang memiliki multifungsi sebagai air irigasi, air baku dan PLTA. Bendungan ini merupakan tipebendungan urugan batu dengan inti tegak yang memiliki panjang puncak 210 m, lebar 12 m, dan tinggi 78 mdari pondasi terdalam. Bendungan ini dibangun dengan kondisi geologi yang relatif kompleks dan terjadilongsoran pada dinding pelimpah dan ditemukan mata air pada longsoran sehingga perlu dilakukan analisisterhadap potensi piping akibat adanya mata air. Penelitian ini mengkaji potensi terjadinya erosi buluh (piping)akibat pengaruh mata air yang ada di dekat bendungan. Kajian dilakukan berdasarkan pengamatan instrumenselama masa penggenangan Tahun 2016 hingga Tahun 2019. Analisis dilakukan dengan menghitung kriteriapenerimaan (KP) rembesan dan indeks rembesan (Qi) untuk mengetahui perilaku rembesan pada tubuhbendungan dan dilakukan analisis faktor keamanan (FK) terhadap bahaya piping dengan membandingkangradien hidrolik berdasarkan pembacaan instrumen pisometer dan gradien hidrolik material inti tubuhbendungan. Berdasarkan hasil perhitungan kriteria penerimaan rembesan dan indeks rembesan menunjukkanrembesan yang terjadi pada Bendungan Titab tidak aman karena melebihi persyaratan, rembesan rata-rataterjadi sebesar 6,350 > 0,56 liter/menit/m dan Qi > 1. Namun analisis terhadap FK bahaya piping masih amanyaitu sebesar 8,390 > 4.
Co-Authors Afiff Faiq Hakim Harahap Andin Cipto Nugroho Andin Cipto Nugroho, Andin Cipto Anggara, I Putu Hariawan Arief Bayu Setiaji, Arief Atmodjo, Pranoto Samto Azkira Nur Auzan Bertha Silvia Pratiwi, Bertha Silvia Bima Anjasmoro, Bima Dwi Kurniani Dwi Kurniani Dyah Ari Wulandari Dyah Ari Wulandari Fadhlul Rahman Faisal Nurrohman Fattah, Zihad Al Firdazam, Firdazam Firman Hasiholan Fitria Sofi Choirunisa Florentina Kusmiyati Hanny Hafiar Hari Nugroho Hary Budieny Hasan Mudhofar Hasan Mudhofar, Hasan Hayu Rahayu Indah Tri Wahyuni, Indah Tri Ivanna Susanto Iwan K. Hadihardaja Joetata Hadihardaja Khaidir, Trifad Mochammad Kirno Kirno Kresno Wikan Sadono M.Pd S.T. S.Pd. I Gde Wawan Sudatha . Mayasari Mayasari Mohammad Faqih Murdiani, Kiki Marina Nugroho, Adi Prasetya Pakpahan, Samuel Seprian Pranoto S. Atmodjo Pranoto Samto Admodjo Pranoto Samto Atmodjo Pranoto Samto Atmojo Pranoto Samto Atmojo Rachman, Muhammad Perwira Ramadan, Bimastyaji Surya Recha Resnandi Raka Riris Dwi Astuti Risdiana Cholifatul Afifah, Risdiana Rohman, Fauji Roselyn, Melfina Ruzika Habib Satria Waskita Eka Paksi Septina Qurniawati Siswanto Siswanto Siwu, Wulandari Pingkan Sriyana Sriyana Sriyana Sriyana Sriyana, Ignatius Sugiyanto Sugiyanto Suharyanto Suharyanto Suharyanto Sukamta Sukamta Sulistya, Krisna Suprapto Suprapto Sutarto Edhisono Thomas Triadi Putranto, Thomas Triadi Tryamarti, Cindy Wahyu Prasetyo Waryani, Retno Sri Wibowo, Agus Aris Yohanna Fabiola Pane Yudi Kurniawan Yulia Ananda Putri