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All Journal Civil Engineering Forum Teknik Sipil Inersia : Jurnal Teknik Sipil dan Arsitektur MEDIA KOMUNIKASI TEKNIK SIPIL Jurnal Teknik Sipil agriTECH Semesta Teknika Jurnal Teknik Sipil Cantilever: Jurnal Penelitian dan Kajian Bidang Teknik Sipil Journal of the Civil Engineering Forum Prosiding Seminar Nasional Teknik Sipil UMS Jurnal Geografi LIngkungan Tropik (Journal of Geography of Tropical Environments)
Joko Sujono
Departemen Teknik Sipil Dan Lingkungan, Fakultas Teknik, Universitas Gadjah Mada, Yogyakarta.
Agriculture, Biological Sciences & Forestry Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Engineering Transportation

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Performance of Dodging Channels and Cofferdams Against Flood Flows in the Construction of Bener Dams Lestari, Yuni; Istiarto, Istiarto; Sujono, Joko
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 19 No. 2 (2023): December
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v19i2.58182

Abstract

Bener Dam is one of the new dams built in Bogowonto River, in Guntur Village, Bener District, Purworejo Regency. Bener Dam was constructed to fulfill the irrigation and raw water demand, and also as a flood control, and a micro-hydro power plant, conservation, and tourism that can improve the economy. The diversion works of the Dam consist of the construction of a cofferdam and a diversion tunnel. The cofferdam and diversion tunnel need to be planned well to prevent the river from overflowing through the main dam and causing material losses and casualties. Therefore it is necessary to study the performance of cofferdam and the diversion tunnel of Bener Dam against the flood discharge. In this study, the diversion tunnel flood routing was carried out by HEC-RAS software version 4.1.0. The design flood uses return periods of 25 and 50 years. The flood routing simulation is carried out by two scenarios: the flow simulation on the existing conditions and the flow simulation on the diversion tunnel. The research results show that the Bogowonto River still can accommodate 25-year, and 50-year floods along the river channel. The cofferdam with a peak elevation of +235 m which is designed with a discharge of 410 m3/s is also capable of diverting the flood discharge with a return period of 25 years and 50 years. The diversion tunnel of Bener dam is planned by a horseshoe shape F, with a 25-year flood design with 7m tunnel diameter Based on the flood routing analysis, it was found that the maximum water elevation in the diversion tunnel was +221 m, and with outflow of 332 m3/s. The 50-year flood routing in the diversion tunnel results maximum water elevation of +222 m with an outflow of 396 m3/s. The flood simulation shows the flow characteristics in the diversion tunnel in the form of open channel flow because the tunnel is not filled by water. Then, the maximum flow velocity on the diversion tunnel is ±14.3 m/s which exceeds the permissible velocity so it can cause damage due to erosion and affect the amount of sediment transport.
A Review of Recent Developments on Modeling Low Impact Development (LID) Technique: Tinjauan Terhadap Perkembangan Terkini dalam Pemodelan Teknik Low Impact Development (LID) Al Amin, Muhammad Baitullah; Sujono, Joko; Triatmadja, Radianta
Cantilever: Jurnal Penelitian dan Kajian Bidang Teknik Sipil Vol. 13 No. 1 (2024): Cantilever
Publisher : Department of Civil Engineering and Planning, Faculty of Engineering, Sriwijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35139/cantilever.v13i1.320

Abstract

Urban areas are more susceptible to flooding and water body contamination due to the detrimental effects of urbanization. As a result, a sustainable urban drainage system, also known as low impact development (LID) technique, is required. Although this technique can be extensively applied, the planning and design processes are multi-dimensional, multi-variable, and site-specific, which must consider various local conditions and factors. Consequently, these processes can be very complicated and time-consuming for professionals, necessitating support from computer modeling. This study intends to thoroughly explore the idea of LID modeling, various available computer models, and other tools for its optimization and decision-making processes. The most recent trustworthy journal publications that addressed the subjects under discussion were reviewed. This paper used the descriptive and comparative approaches as the analytical methods. According to the findings of the review, Storm Water Management Model (SWMM) is the computer model in LID modeling that is most frequently employed. This model is a fundamental package for dynamic urban rainfall-runoff modeling, and it has the benefits of being lightweight, simple to use, and an intuitive user interface. Besides, this model is public domain (free to use), open source, and interoperable with many hydro modeling applications. A specific LID editor module is also included in this model for modeling different LID units. To acquire the best LID planning and design from multiple criteria and alternatives, it is also necessary to use metaheuristic algorithms as an optimization model and a multi-criteria decision-making (MCDM) model in addition to the rainfall-runoff model. The authors believe combining the hydrologic and hydraulics models integrated with geographical information systems (GIS), metaheuristic algorithms, and MCDM is the most comprehensive and appropriate method for LID modeling in urban watersheds.
Evaluation of Satellite-based Rainfall Data in Flood Prediction Wisnulingga, Bayu Krisna; Sujono, Joko; Jayadi, Rachmad
Semesta Teknika Vol 26, No 2 (2023): NOVEMBER
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/st.v26i2.19036

Abstract

Rainfall-runoff transformation is a solution to the difficulty of obtaining observed discharge data in flood prediction analysis. Rainfall-runoff transformation requires observed rainfall data with a high rate of accuracy spatially. However, observed rainfall data is also often not available. Satellite rainfall data is commonly used to replace observed rainfall data. However, the accuracy of satellite rainfall data still needs to be tested. This study applied rainfall-runoff transformation to the observed rainfall data and the PERSIANN, GPM, and GSMaP satellite rainfall data in the Opak Watershed using GAMA I SUH method, which were then compared with the observed hydrograph at the AWLR Kretek during the flood event that occurred in Yogyakarta Province due to Cyclone Cempaka to evaluate their accuracy. The results showed that the GPM data generated a hydrograph that is the closest to the observed hydrograph, both the shape and the peak of the hydrograph.
Redaman Banjir Pasca Pembangunan Bendungan Ciawi dan Sukamahi Hartono, Alexandre Octavio; Istiarto, I; Sujono, Joko
Prosiding Seminar Nasional Teknik Sipil UMS 2022: Prosiding Seminar Nasional Teknik Sipil UMS
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (282.459 KB)

Abstract

Bendungan Ciawi dan Sukamahi yang dibangun di hulu Sungai Ciliwung merupakan salah satu upaya pemerintah untuk mengurangi banjir DKI Jakarta. Kedua bendungan tersebut dibangun dengan konsep dry dam sehingga tidak menampung air pada kondisi aliran sungai normal dan hanya berfungsi untuk mereduksi debit banjir. Pemodelan dan kalibrasi hidrologi DAS Ciliwung Hulu dilakukan untuk mengetahui karakteristik DAS Ciliwung Hulu dengan bantuan software HEC-HMS. Data yang digunakan untuk melakukan kalibrasi adalah data hujan dan aliran pada tanggal 16-18 Januari 2013. Kemudian dilanjutkan dengan simulasi banjir menggunakan debit 50 tahun, 100 tahun, dan PMF untuk mengetahui kinerja bendungan terhadap banjir. Metode yang digunakan untuk penelusuran banjir adalah level pool routing dan channel routing (time lag method). Hasil penelusuran banjir 50 dan 100 tahunan menunjukan redaman banjir yang cukup besar yaitu 36,4%-39% untuk banjir 50 dan 100 tahunan. Kontribusi redaman banjir oleh Bendungan Ciawi adalah 80-85% dan Bendungan Sukamahi adalah 15-20% dari total redaman banjir.
Co-Authors Al Amin, Muhammad Baitullah Anita Yuliana Bambang Triatmodjo Bambang Triatmodjo Bayu Krisna Wisnulingga Corri Eriza Elenora Gita Alamanda Sapan Fatchan Nurrochmad Hartono, Alexandre Octavio Ismoyojati, Goyu Istiarto Istiarto Istiarto, I Karlina Karlina Karlina Pamungkas, Yusuf Aji Rachmad Jayadi Radianta Triadmadja Rahardjo, Adam Pamudji Refika, Cut Dwi Sasmito Sasmito Sasmito Sasmito, Sasmito Sri Harto, Br Sri Harto, Br, Sri Yuni Lestari