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All Journal Civil Engineering Forum Teknik Sipil Jurnal Ilmiah Teknik Sipil International Journal of Science and Engineering (IJSE) MEDIA KOMUNIKASI TEKNIK SIPIL Jurnal Ilmiah Desain & Konstruksi IPTEK The Journal for Technology and Science Jurnal Teknik Sipil Jurnal Teknik Pengairan: Journal of Water Resources Engineering Semesta Teknika Teknisia Eco Rekayasa Jurnal Teknik Sipil Journal of the Civil Engineering Forum Civil Engineering Journal FROPIL (Forum Profesional Teknik Sipil) Civil and Environmental Science Journal (CIVENSE) JURNAL TEKNIK HIDRAULIK JURNAL SUMBER DAYA AIR Community Empowerment Prosiding Seminar Nasional Teknik Sipil UMS Jurnal Geografi LIngkungan Tropik (Journal of Geography of Tropical Environments) LIMNOTEK

Djoko Legono

Departemen Teknik Sipil Dan Lingkungan, Fakultas Teknik, Universitas Gadjah Mada

Author-ID : 305546

Arts Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Education Engineering Environmental Science Public Health Social Sciences Transportation

Published : 43 Documents Claim Missing Document

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Strategic Sustainable Management for Water Transmission System: A SWOT-QSPM Analysis Ni Made Sumiarsih; Djoko Legono; Robert J. Kodoatie
Journal of the Civil Engineering Forum Vol. 4 No. 1 (January 2018)
Publisher : Department of Civil and Environmental Engineering, Faculty of Engineering, UGM

In general, the problem of a water resources infrastructure, especially the raw water transmission system, is that the actual discharge is not in accordance with design discharge because of water losses along the transmission system.To restore the capacity to the design discharge, a comprehensive strategy is required. Various strategy methods have been developed especially the strategy of managing a system. This paper discusses how to analyze the comprehensive strategy with system component approach for water transmission system. The research used Klambu-Kudu Water Transmission System in Semarang, Central Java, Indonesia as a case study. Strategy analysis of Klambu-Kudu Water Transmission System utilized the modified Strength, Weakness, Opportunity, and Threats (SWOT) with Likert scale and Quantitative Strategic Planning Matrix (QSPM) method. SWOT analysis is was carried out to obtain a comprehensive strategy on each component of the water transmission system (intake, mud pouch, siphon, gutter, bridge, culvert, regulator doors, suppletion, drain pipe, and / or excavation), while the QSPM method is required to analyze the strategic priorities of component of Klambu Kudu Water Transmission System. Key factors of water transmission system performance were obtained from the discussion of experts, the management of Klambu Kudu Water Transmission System and the community. The results are a priority of strategies which are dominated by the opportunity factors to solve the problem of weakness (operation and maintenance, sedimentation, damage) and threats (water theft, destruction of buildings, flood) as well as maximizing the strengths (condition of the component, function, accessibility).

Snake Line Performance Applying Single Pixel X-Band MP Radar Data (Case of Mt. Merapi Area, Indonesia) Ani Hairani; Adam Pamudji Rahardjo; Djoko Legono; Istiarto Istiarto
Journal of the Civil Engineering Forum Vol. 5 No. 3 (September 2019)
Publisher : Department of Civil and Environmental Engineering, Faculty of Engineering, UGM

The short-duration-rainfall monitoring techniques have become important recently due to the high demand for disaster risk mitigation. Such techniques produce important information on the rainfall intensity during heavy rainfall in the form of snake line. At the same time, use of X-Band Multi-Parameter Radar (XMP Radar) in rainfall monitoring has increased significantly because of its capacity to cover wide area. An assessment on the snake line performance that was developed based on XMP Radar and ground rainfall monitoring instrument (i.e. Automatic Rainfall Recorder or ARR) has been applied to Mt. Merapi area, Java, Indonesia. Selected rainfall data of November-December 2018 were examined. The assessment used a single pixel of radar data at the location of the ARR. The result shows that rainfall data obtained from XMP Radar are lower than those from ARR. The computed snake line obtained from XMP Radar differs from that from ARR data. The XMP Radar underestimates the warning level by about two level out of four.

Correcting Radar Rainfall Estimates Based on Ground Elevation Function Roby Hambali; Djoko Legono; Rachmad Jayadi
Journal of the Civil Engineering Forum Vol. 5 No. 3 (September 2019)
Publisher : Department of Civil and Environmental Engineering, Faculty of Engineering, UGM

X-band radar gives several advantages for quantitative rainfall estimation, involving higher spatial and temporal resolution, also the ability to reduce attenuation effects and hardware calibration errors. However, the estimates error due to attenuation in heavy rainfall condition cannot be avoided. In the mountainous region, the impact of topography is considered to contribute to radar rainfall estimates error. To have more reliable estimated radar rainfall to be used in various applications, a rainfall estimates correction needs to be applied. This paper discusses evaluation and correction techniques for radar rainfall estimates based on ground elevation function. The G/R ratio is used as a primary method in the correction process. The novel approach proposed in this study is the use of correction factor derived from the relationship between Log (G/R) parameter and elevation difference between radar and rain gauge stations. A total of 4590 pairs of rainfall data from X-band MP radar and 15 rain gauge stations in the Mt. Merapi region were used in evaluation and correction process. The results show the correction method based on the elevation function is relatively good in correcting radar rainfall depth with values of Log (G/R) decreased up to 81.1%, particularly for light rainfall (≤ 20 mm/hour) condition. Also, the method is simple to apply in a real-time system.

Sustaining Water-Related Heritage Infrastructures as Part of An Integrated Water Resource Management Program Radianta Triatmadja; Djoko Legono; Budi Wignyosukarto; Fatchan Nurrochmad; Sunjoto Sunjoto
Journal of the Civil Engineering Forum Vol. 6 No. 2 (May 2020)
Publisher : Department of Civil and Environmental Engineering, Faculty of Engineering, UGM

The history of the water resources development in the world is generally inspired by the physical, climate and socioenvironment conditions such as geographical, culture and civilization at the local level. For many years, humans have spent tremendous efforts and time improving the quality of life through adequate water utilization. This research, therefore, aims to analyze the ancient water-related infrastructures as cultural heritages in creating a functional and adequate design. Data were obtained from the Mataram Canal in Yogyakarta Province which was selected due to the success story and various benefits associated with the Indonesian history of water resources in Central Java provinces. Today, some places along the canal have become tourist destinations, and it is more popular in Yogyakarta due to its architectural history. However, the diversification of water utilization in fishery ponds along the canal and the shift in land utilization from rice field to housings, and government buildings may undermine the function of the canal. The factual condition associated with the periodic decrease in irrigation command does not make the Mataram Canal useless. Therefore, efforts to maintain its function through restoration, and revitalization, can enhance water supply for irrigation and other purposes such as fish ponds and, pollutant dilution. The Strength-Weakness-Opportunity-Threat (SWOT) method with some key performance indicators was adopted to access the necessity of the sustainability program of the Mataram Canal as the heritage infrastructure. Some key performance indicators related to Integrated Water Resources Management (IWRM) program in Indonesia were introduced and utilized to prioritize the necessary actions. The results showed that the SWOT analysis promotes various actions to support the IWRM-related program of Mataram Canal. Furthermore, the implementation of the promoted actions would contribute to the longer sustainability of the Mataram Canal.

The Impacts of Flood and Drought on Food Security in Central Java Endita Prima Ari Pratiwi; Eka Laily Ramadhani; Fatchan Nurrochmad; Djoko Legono
Journal of the Civil Engineering Forum Vol. 6 No. 1 (January 2020)
Publisher : Department of Civil and Environmental Engineering, Faculty of Engineering, UGM

To achieve food security, water must be available at the right place, at the right time, in the right quantity, and be of the right quality. Water-related disasters will negatively affect agricultural areas and crop production, which can threaten food security. Nevertheless, flood and drought strike Central Java, one of the rice production centres in Indonesia, every year, and climate change has been worsening the condition because extreme events occur more frequently. This study reviews the impacts of flood and drought on paddy fields in Central Java from 2014 to 2018. A set of historical documents, including reports on flood and drought, rainfall records, and rice production, were collected from government institutions. Quantitative analysis was conducted using statistics and geographic information system tools. The results showed that the 2014 flood event reflected badly on 94,306 hectares (ha) paddy fields. Four severely affected regencies were Pati (25,460 ha), Demak (13,560 ha), Jepara (13,281 ha), and Kudus (12,203 ha). Meanwhile, drought in 2015 affected 82,324 ha paddy field. The areas severely damaged by drought were Blora (12,335 ha), Cilacap (11,503 ha), Grobogan (10,514 ha), and Pemalang (10,134 ha). Pearson’s correlation analysis results indicated that the correlation between annual rainfall and drought impact (r = −0.865, p = 0.058) is more significant than that between annual rainfall and drought impact (r = 0.794, p = 0.108). The stakeholders have adopted some strategies to minimise losses, such as establishing a 1,000 small water reservoirs program, preparing temporary pump irrigation, and providing agricultural insurance. Nevertheless, more efforts are still necessary to fight against food insecurity.

Rainfall-Runoff Simulation Using HEC-HMS Model in the Benanain Watershed, Timor Island Wilhelmus Bunganaen; John H. Frans; Yustinus Akito Seran; Djoko Legono; Denik Sri Krisnayanti
Journal of the Civil Engineering Forum Vol. 7 No. 3 (September 2021)
Publisher : Department of Civil and Environmental Engineering, Faculty of Engineering, UGM

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jcef.64782

Floods in a watershed area are caused by reduced water recharge due to changes in land use, increasing their discharge volume. Benanain watershed is an extensive area with many tributaries. Watershed morphometrics provides initial information about the hydrological behavior and the hydrograph shape of flooding in these areas. Furthermore, rainfall-runoff modeling uses as a unit to approach the hydrological values of the flooding process. This study determines the physical characteristics of the Benanain watershed based on curve number (CN) values, land cover, peak discharge, and peak time. It was conducted on the Benanain watershed with 29 sub-watersheds covering 3,181.521 km2. Data were collected on the rainfall experienced for 13 years from 1996 to 2008 and analyzed using the Log Pearson Type III method, while the HEC HMS model was used for flood discharge analysis. HEC-HMS model must calibrate by adjusting the model parameter values until the model results match historical data such as initial abstraction, lag time, recession, baseflow values, and curve number. The results show that the curve number values range from 56.55 - 73.90, comprising secondary dryland forest and shrubs. Moreover, the rock lithology in the Benanain watershed is dominated by scaly clay and other rock blocks. This means the area has low to very low permeability, which affects the volume of runoff. The return period of a 1000-year flood discharge obtained a peak of 5,794.50 m3/s, with a peak time of ± 14 hours. Morphometry of the Temef watershed with large catchment, radial shape pattern, an average of steep slope river, and meandering affects the peak of flood discharge hydrograph and the peak time of the flood.

SENSITIVITAS HASIL UJI MODEL FISIK TERHADAP PERBEDAAN PENGGUNAAN ANGKA KEKASARAN n-MANNING Miskar Maini; Djoko Legono
FROPIL (Forum Profesional Teknik Sipil) Vol 9 No 1 (2021): FROPIL (Forum Profesional Teknik Sipil)
Publisher : Jurusan Teknik Sipil Universitas Bangka Belitung

Perencanaan bangunan hidraulik membutuhkan analisis yang komprehensif sehingga sarana standar pemodelan hidraulik untuk desain jenis struktur hidraulik terdiri dari model fisik hidraulik berskala sangat diperlukan. Batasan utama dari teknik eksperimental pada model fisik adalah efek skala yang terkait disebabkan oleh ketidakmungkinan untuk menyamakan semua rasio gaya dalam prototip dan model, terutama dalam pemodelan kekasaran n-Manning di saluran terbuka. Untuk mensimulasikan model fisik dari pemodelan kekasaran n-Manning di skala model hidraulik tentu harus dilakukan validasi terkait berbagai aspek aliran yang dilakukan dalam uji model fisik, skala prototip disimulasikan, dan efek skala diperiksa. Tujuan penelitian ini untuk merepresentasikan kekasaran n-Manning dengan tepat dari prototip ke skala model, Studi ini menginvestigasi sensitivitas yang didapat dari penggunaan kekasaran hidraulik untuk Persamaan Manning (n), dengan fokus pada akurasi dan batasan dari persamaan Manning. Nilai rata-rata penggunaan skala model kekasaran n-Manning yang didapatkan dari tes model sebesar 27,27% atau skala 1:27 (rasio Lr = 3,67), hasil ini sangat berbeda dari nilai ekpektasi penggunaan skala model yang direncanakan dengan skala 25% (1/4 dari prototip) atau skala 1:25 (rasio Lr = 4), sehingga terjadi deviasi sensitivitas rata-rata dengan persentase mencapai 2,27%. Sedangkan hasil nilai n-Manning ekspektasi didapatkan nilai rata-rata persentase sensitivitas sebesar 20,75% (1/5 dari prototip) atau skala 1:20 (rasio Lr = 5). Sedangkan analisis koefisien korelasi nilai n-Manning yang didapatkan nilai R2 = 0,648, MER =-31,5, dan RMSE= 0,0006. Semua penggunaan elemen kekasaran n-Manning yang dibuat dengan skala 1:25 (rasio Lr = 4) memberikan tingkat kesalahan rata-rata mencapai +31%.

Karakteristik Kecepatan Aliran Di Dekat Dasar Pintu Peluapan Bawah (Sluice Gate) Agatha Padma Laksitaningtyas; Djoko Legono; Bambang Yulistiyanto
Jurnal Teknik Pengairan: Journal of Water Resources Engineering Vol. 11 No. 1 (2020)
Publisher : Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.pengairan.2020.011.01.07

Pintu air berfungsi sebagai pengatur aliran air yang berfungsi untuk mengendalikan debit, muka air dan monitoring debit. Aliran air yang mengalir melalui pintu dapat dalam kondisi aliran bebas maupun aliran terendam yang tergantung dari kedalaman tailwater. Karakteristik aliran yang mengalir melalui pintu air berdasarkan persamaan keseimbangan energi dan momentum, yang tergantung dari tekanan, kecepatan dan kedalaman air yang berada di hulu /hilir pintu air. Hidrolika pintu air terutama pada kondisi aliran bebas sangat dinamis, termasuk profil muka air, gaya yang terjadi pada pintu, atau distribusi pintu bagian bawah, yang banyak diabaikan. Terdapat beberapa pengembangan rumus dasar dari aliran yang mengalir melalui pintu air, terutama pada pengembangan vena kontrakta. Vena kontrakta akan menghasilkan nilai dari koefisein debit (Cd) dan koefisien kontraksi (Cc) yang didapatkan dari rasio perhitungan metode yang sudah ada. Metode dapat juga dengan rasio pengukuran, perhitungan kejadian secara teoritis dan melalui percobaan di laboratorium. Persamaan debit melalui pintu tidak terlalu efektif bila digunakan pada kondisi bukaan pintu yang besar dan pada kondisi pintu terendam penuh.

POTENSI WILAYAH TERDAMPAK KERUNTUHAN BENDUNGAN MATENGGENG DI SUNGAI CIJOLANG Utomo, Bagus Prio; Rahardjo, Adam Pramudji; Legono, Djoko
Jurnal Geografi Lingkungan Tropik (Journal of Geography of Tropical Environments) Vol. 3, No. 1
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Matenggeng Dam, which plans to be built on the Cijolang River, is a multifunctional dam that has many benefits for communities to irrigate irrigation, raw water, flood control, power generation and tourism. Besides having many benefits, dam construction also keeps very high potential hazards. One of the potential hazards that can occur is the dam breach caused by a crack due to water going over the crest (overtopping) or fracture due to seepage in the body of the weir (piping). Dam breach will cause very big flood so it can cause casualties and damage to property. Using the HEC-RAS 5.0.3 program, we found that in the overtopping scenario, the spillway dimension was still able to pass the maximum discharge (QPMF) of 9.067 m3 /s so that the water did not reach the crest. In the piping scenario, estimated that the extent of inundation reaches 17.568 ha and will inundate 92 villages, 416 km of roads, and 169 public facilities. Over half of the flooded areas are categorized as high to extreme hazards with rice fields are the areas that fall into the category most.

EFFORTS TO OPTIMIZE THE OPERATION OF THE DADAHUP LOWLAND IRRIGATION AREA IN CENTRAL KALIMANTAN Asril Zevri; Adam Pamudji Rahardjo; Djoko Legono
JURNAL TEKNIK HIDRAULIK Vol 14, No 2 (2023): JURNAL TEKNIK HIDRAULIK
Publisher : Direktorat Bina Teknik Sumber Daya Air, Kementerian Pekerjaan Umum dan Perumahan Rakyat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32679/jth.v14i2.726

ABSTRACT Dadahup lowland irrigation area is one of the areas developed as a food estate. Land cover change to shrubs is caused by channels with buildings that are not functioning optimally, so it is often hit by floods and droughts. One of the efforts to improve the function of channels and buildings is to control the minimum water level of 60 cm in the dry season and the maximum water level of 10 cm in the rainy season. This study aims to determine the optimal operations and maintenance through adjusting the elevation of the gate opening to achieve the quantity and quality for the development of water management systems in lowland irrigation. The research method was carried out with hydraulic simulation based on the tides of the Barito River Mouth, discharge, rainfall, and pH obtained from telemetry monitoring system with openings of all sluice gates in primary channels and secondary channels. The results showed that operation and maintenance optimization can be done by setting primary and secondary sluice gates that are opened at a water level elevation above + 0.5 m in the dry season as supply and water level elevation + 1.1 m in the rainy season as drainage. Primary and secondary sluice gates are closed at water levels below + 0.5 m to maintain water levels and water quality.Keywords optimization, lowland, Dadahup Lowland Irrigation Area , HEC-RAS, hydraulic ABSTRAKDaerah irigasi rawa Dadahup merupakan salah satu daerah yang dikembangkan sebagai lumbung pangan. Perubahan tutupan lahan menjadi semak belukar disebabkan oleh saluran dengan bangunan yang tidak berfungsi secara optimal sehingga sering dilanda banjir dan kekeringan. Salah satu upaya untuk meningkatkan fungsi saluran dan bangunan adalah dengan mengendalikan tinggi muka air minimum 60 cm pada musim kemarau dan tinggi muka air maksimum 10 cm pada musim hujan. Penelitian ini bertujuan untuk mengetahui pola operasi dan pemeliharaan yang optimum melalui pengaturan pintu dalam mencapai kuantitas dan kualitas air yang sesuai untuk pengembangan sistem tata air di lahan irigasi rawa. Metode penelitian dilakukan dengan simulasi hidraulika berdasarkan pasang surut muara Sungai Barito, debit, curah hujan, dan pH yang diperoleh dari sistem monitoring telemetri dengan bukaan setiap pintu air pada saluran primer serta saluran sekunder. Hasil penelitian menunjukkan bahwa optimasi operasi dan pemeliharaan dapat dilakukan dengan pengaturan pintu air primer dan sekunder yang dibuka pada elevasi muka air di atas + 0,5 m pada musim kemarau sebagai supply dan elevasi muka air + 1,1 m pada musim penghujan sebagai drainase. Pintu air primer dan sekunder ditutup pada elevasi muka air di bawah + 0,5 m untuk menjaga tinggi muka air dan kualitas air.Kata Kunci: optimasi, rawa, Daerah Irigasi Rawa Dadahup, HEC-RAS, hidrolika

Co-Authors Adam Pamudji Rahardjo Adam Pamudji Rahardjo Adam Pamudji Rahardjo Adam Pamudji Raharjo Agatha Padma Laksitaningtyas Agatha Padma Laksitaningtyas Agatha Padma Laksitaningtyas, Agatha Padma Ahad Legiarto Ali Rahmat Ani Hairani Ani Hairani Asril Zevri Bambang Agus Kironoto Bambang Agus Kironoto Bambang Triatmodjo Bambang Yulistiyanto Bambang Yulistiyanto Bambang Yulistiyanto Basuki Widodo Bella Koes Paulina Cantik Budi Santosa Budi Santosa Budi Wignyosukarto Cahyono Ikhsan Candra Dian Lukita Tauhid Cantik, Bella Koes Paulina Davianto Frangky B. Welkis Denik Sri Krisnayanti Dewi Ayu Sofia Dyah Ari Wulandari Eka Laily Ramadhani Elenora Gita Alamanda Sapan Endita Prima Ari Pratiwi Fatchan Nurrochmad Fauziyah, Risky Fery Moun Hepy Fitriana, Indri Rahmandhani Hanny Hafiar Haryono Haryono Haryono Kusumosubroto Heriantono Waluyadi Ikawati, Nur Ikhsan, Cahyono Istiarto Istiarto Istiarto Istiarto Istiqomah, Nurul Alvia John H. Frans John Hendrik Frans Joko Sujono Kazuhiko Otani Kironoto, Bambang Agus Kisindi Nur Afifah Made Sumiarsih Made Sumiarsih Misdiyanto Misdiyanto Miskar Maini Nadjadji Anwar Ni Made Sumiarsih Ni Nyoman Nepi Marleni Rachmad Jayadi Radianta Triadmadja Rahardjo, Adam Pamudji Rahardjo, Adam Pramudji Raharjo, Adam Pamudji Ramon Putra Robert J. Kodoatie Robert Kodoatie Robert Kodoatie, Robert Roby Hambali Sabila, Nur Ariva Seran, Yustinus A. Subagyo Pramumijoyo Suharyanto Suharyanto Sumiadi, Sumiadi Sunjoto Sunjoto Suseno Darsono Suseno Darsono SYAHRANI SYAHRANI Teuku Faisal Fathani Umar Fauzan Utomo, Bagus Prio Wilhelmus Bunganaen Wilhelmus Bunganaen Yustinus Akito Seran

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