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All Journal MEDIA KOMUNIKASI TEKNIK SIPIL Jurnal Teknik Sipil Research Report - Engineering Science Journal of the Civil Engineering Forum JURNAL TEKNIK HIDRAULIK JURNAL SUMBER DAYA AIR Journal of Infrastructure and Facility Asset Management International Journal of Science and Society (IJSOC) Journal of the Civil Engineering Forum

Albert Wicaksono

Jurusan Teknik Sipil, Fakultas Teknik, Universitas Katolik Parahyangan

Author-ID : 2748985

Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Energy Engineering Environmental Science Library & Information Science Materials Science & Nanotechnology Mathematics Social Sciences Transportation

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STUDI KELAYAKAN WADUK CIKAWARI 2A DAN 5A DALAM RANGKA PEMENUHAN KEBUTUHAN AIR KOTA BANDUNG Cleon Christopher; Doddi Yudianto; Albert Wicaksono
JURNAL TEKNIK HIDRAULIK Vol 12, No 1 (2021): JURNAL TEKNIK HIDRAULIK
Publisher : Pusat Litbang Sumber Daya Air, Kementerian Pekerjaan Umum dan Perumahan Rakyat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32679/jth.v12i1.654

The water need in the Northern area of Bandung City was predicted to be 2.49 m3/s in 2040. The government responded to this issue by planning the construction of several reservoirs in the Cikapundung watershed. A previous study suggested three potential locations, i.e., Cikukang 2, Cikawari 2A, and Cikawari 5A reservoir. Since Cikawari 2A and Cikawari 5A are located on the same Cikawari river, three construction alternatives, i.e., a single reservoir of Cikawari 2A, a single reservoir of Cikawari 5A, and cascade reservoir Cikawari 2A+5A are proposed. Each alternative has its own advantages and limitations, thus evaluation of the best construction alternative needs to be carried out. The evaluation was conducted based on their reliable service in supplying water to Bandung City. This evaluation was analyzed by comparing the projected water demand following population growth and water availability derived from the rainfall-runoff model, NRECA. The analysis was conducted using two variations of dam height and reservoir capacity for each alternative. Based on the analysis results, the single reservoir of Cikawari 2A with 45 m of dam’s height was chosen as the most suitable alternative. It can supply 0.56 m3/s of water and provide water for 30.4% of the citizens in 2020, and decrease to 30.15% in 2040. However, it was also found that the reservoir could only supply 0.44 m3/s of water during the dry period. These results showed that the construction of the reservoir itself could not meet the total water demand. Therefore, another alternative is required to closing the gap in water demand.Keywords: Cikapundung watershed, water supply, Cikawari reservoir, reservoir simulation, service reliability

EVALUASI KAPASITAS TAMPUNGAN DAN SALURAN PEMBUANG PASCA KERUNTUHAN TANGGUL KOLAM TAMPUNGAN DI KAWASAN PERUMAHAN Albert Wicaksono; Doddi Yudianto
Research Report - Engineering Science Vol. 2 (2013)
Publisher : Universitas Katolik Parahyangan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (6723.976 KB)

Kolam retensi dengan kapasitas tampungan sebesar 80.000 m3 dan luas total permukaan mencapai1,5 ha digunakan oleh sebuah kawasan perumahan di Bandar Lampung sebagai pengendali banjirsaat terjadi hujan dengan intensitas yang tinggi. Pada 24 Januari 2013, tanggul di sekitar kolamretensi mengalami keruntuhan sehingga air yang tertampung di dalam kolam keluar secara tidakterkendali dan mengakibatkan genangan setinggi 1 m di hilir kawasan perumahan tersebut.Dilatarbelakangi kondisi tersebut, studi ini bertujuan untuk melakukan evaluasi terhadapkemampuan dari kolam retensi untuk mengendalikan limpasan air yang masuk ke dalam kolamtersebut. Analisis akan dilakukan menggunakan bantuan perangkat lunak HEC-HMS. Berdasarkanhasil simulasi, diketahui bahwa kapasitas kolam retensi saat ini hanya mampu untuk menampungvolume limpasan air akibat banjir hingga periode ulang 5 tahun. Untuk meningkatkan kemampuandari kolam retensi tersebut, diperlukan suatu kolam retensi tambahan di bagian hulu untukmenantisipasi terjadinya debit banjir dengan periode ulang yang lebih tinggi. Selain itu, kondisisaluran buang yang ada saat ini dinilai tidak mampu untuk mengalirkan air keluar dari kolam retensidengan cukup cepat sehingga terjadi penumpukkan volume air di dalam kolam. Untukmengatasinya, diperlukan dua buah saluran tambahan berupa gorong-gorong dengan diameter 1atau 1,5 m yang untuk mengurangi tinggi muka air di dalam kolam. Analisis lebih lanjutmenunjukkan bahwa kombinasi dari penambahan kolam baru dengan kapasitas 432.000 m3 danpenambahan dua buah saluran buang berdiameter 1 m, dapat meningkatkan kapasitas kolam retensieksisting hingga dapat menampung volume air akibat banjir dengan periode ulang 100 tahun.Tentunya penambahan saluran buang pada kolam retensi perlu diiringi dengan normalisasi sungaiatau pembuatan tanggul di hilir kolam retensi untuk mencegah terjadinya banjir pada daerah hilir.Kata Kunci: pengendalian banjir, kolam retensi, HEC-HMS

Application of TRMM Data to the Analysis of Water Availability and Flood Discharge in Duriangkang Dam Willy Willy; Bambang Adi Riyanto; Doddi Yudianto; Albert Wicaksono
Journal of the Civil Engineering Forum Vol. 6 No. 1 (January 2020)
Publisher : Department of Civil and Environmental Engineering, Faculty of Engineering, UGM

One of the challenges in hydrologic modelling in Indonesia is data limitation. Rainfall data quality is rarely evaluated, and in some cases, the data are unavailable. The Tropical Rainfall Measuring Mission (TRMM), satellite rainfall data provided by NASA, is an alternative method to solve such problems. This study aims to promote the use of TRMM data to analyze water availability and flood discharge in Duriangkang Dam, Batam City, Indonesia, in comparison with the use of available ground station data. Results show that the ground station data contain some errors; however, overall, the data show similar patterns and acceptable differences compared with the TRMM data. The NRECA and HEC-HMS models are used to analyze water availability, and both models are calibrated using the available reservoir water level data. The NRECA model generally shows a good fit of monthly discharge, although the use of TRMM results in slightly overestimated values in dry years. Similar results are obtained for daily discharge computation using the HEC-HMS model. Water availability analysis using the TRMM data shows an acceptable margin of error. When flood discharge is computed using an uncalibrated HEC-HMS model, the TRMM data somehow yield a lower maximum daily rainfall value than the ground station data. As a result, the obtained 10,000-year flood calculated using the Hang Nadim Station and TRMM data are 1,086 and 624 m3/s, respectively. Therefore, the use of corrected TRMM data in flood discharge computation is essential but increases the value up to 897 m3/s.

Perbandingan Debit Limpasan Langsung antara Pendekatan Model Numerik dan Konvolusi Hidrograf Satuan Sintetis Cleon Christopher; Bobby Minola Ginting; Doddi Yudianto; Albert Wicaksono
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 28, Nomor 1, JULI 2022
Publisher : Department of Civil Engineering, Diponegoro University

This paper compares the results of direct runoff obtained by a numerical model of the shallow water equations (SWE) with the synthetic unit hydrograph (SUH) methods generally used in Indonesia. It is known that such SUH methods are still empirical, thus making it difficult for users to determine a representative method. Meanwhile, the hydrodynamic approach such as the SWE numerical model can achieve more accurate results in predicting the direct runoff compared to the SUH methods, because the model itself is derived mathematically based on the physical processes. The findings indicate that the direct runoff predicted using the SWE numerical model (HEC-RAS 5.0.7) produced more accurate results for the peak discharge with an average error of -0.07%, the peak time with an average error of 19.77%, and the shape of the hydrograph with the smallest Root Mean Square Error (RMSE) from all the cases tested. Therefore, it can be concluded that in the future the use of a hydrodynamic approach is highly recommended for the direct runoff prediction. This paper was also aimed to be used as a reference in the development of new, more accurate SUH method in the future.

A New Approach to Estimate the Potential Assets Loss due to Dam-Break Event in Indonesia Farrell Wiguna; Doddi Yudianto; Bobby Minola Ginting; Albert Wicaksono
Journal of Infrastructure & Facility Asset Management Vol 4, No 1 (2022): Journal of Infrastructure & Facility Asset Management
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/jifam.v4i1.14287

A dam break is a devastating natural catastrophe that can lead to huge losses. In general, the severity of a disaster can be determined by the amount of damage it causes. The greater the loss, the more severe the disaster and vice versa. However, determining the potential asset loss as a result of a disaster is a challenging task. So far, there is no method for calculating potential asset loss that is specifically made for dam-break disasters. Therefore, this study proposes a new approach in calculating the potential asset loss for a dam-break. In this study, the potential asset loss is calculated by considering four factors, namely the Potential Loss of Lives (PLOL), Potential Loss of Incomes (PLOI), Potential Loss of Houses Damage (PLOHD), and Potential Loss of Productive Land (PLOPL). In addition, the study calculates the potential asset loss of the Ketro Dam dam-break disaster. Based on the evaluation results, the PLOL might reach Rp. 26,419,715,661. PLOI might reach maximum value of Rp. 1,185,600,000. PLOHD might reach maximum value of Rp. 4,255,325,000. And lastly , PLOPL might reach maximum value of Rp. 25,375,080,780. Thus, the potential asset loss for the Ketro Dam dam-break disaster based on the analysis can reach Rp. 57,235,721,441 or USD 4,026,304.

Establishing a Simple-yet-effective Approach of Early Warning System for Storm-Induced Earth-Filled Dam-Break Cases in Data-sparse Region Doddi Yudianto; Farrell Wiguna; Bobby Minola Ginting; Albert Wicaksono; Xie Yuebo
Journal of the Civil Engineering Forum Vol. 9 No. 2 (May 2023)
Publisher : Department of Civil and Environmental Engineering, Faculty of Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jcef.6126

Historically, the occurrence of dam-break cases has been proven to cause significant loss of life and economical damage. Apart from the catastrophic nature of dam-breaks, the absence of a robust disaster prevention system exacerbates the disasters that occur. This study proposes an Early Warning System (EWS) to mitigate the impact of dam-break disasters. However, predicting the occurrence of such disasters is challenging, specifically in areas like Indonesia, where comprehensive data recording is lacking. While it may be difficult to predict the occurrence of a sunny day break, the storm-induced break is more predictable. Therefore, this study proposes a simple yet effective macro-based EWS for Earth-Filled Dam-Break Cases using a macro approach based on the Evacuation Clearance Time (ECT). By comparing the ECT value with the arrival time of the floods from the affected areas, additional evacuation time can be obtained, which will be used to determine the EWS. The proposed EWS for Cengklik Dam is given in three levels of warning indicated by the reservoir water level at +141.36 m, +141.40 m, and +141.45 m. With the proposed EWS, the results show that 100% of people are expected to reach the evacuation point safely. The case study shows that the proposed EWS can significantly reduce the risk impact of the dam-break events.

STUDY ON FLOOD CONTROL OF THE CILEUWIBANGKE RIVER DUE TO RESIDENTIAL AREA DEVELOPMENT IN BOGOR CITY, WEST JAVA Doddi Yudianto; Finna Fitriana; Albert Wicaksono; Theo Senjaya
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.v14i2.741

ABSTRACTBogor City, renowned for its high rainfall value, has experienced rapid economic growth, leading to a substantial surge in population. This, in turn, has prompted extensive development, disrupting land use in the urban area. Consequently, effective area planning incorporating an adequate drainage system is imperative to mitigate flooding. The Cileuwibangke River, located south of Bogor City, traverses a residential area earmarked for conversion into commercial and industrial zones. Therefore, evaluating the floodwater level of the Cileuwibangke River is crucial, both in its existing state and post-construction. This study utilized daily data from the Gadog Rainfall Station and hourly data from the GPM satellite spanning from 2001 to 2020 for rainfall analysis. It revealed that several rain events exceeded the 2, 5, and 10-year return periods. Rainfall-runoff analysis showed that changes in land use resulted in a 35-36% increase in peak flood discharge and a 22-28% increase in runoff volume compared to the existing condition. The findings indicated that the normalization of the river section on the residential area side did not significantly lower the floodwater level, attributed to three broad-dimension culverts. Moreover, strengthening the river's bottom and banks is essential due to the observed hydraulic jump indication. Upstream riverbed protection can be achieved with a 35 m stretch of rock material. Keywords: Bogor City, Cileuwibangke River, HEC-HMS, HEC-RAS, and Urban Flood ABSTRAKKota Bogor, dikenal dengan curah hujannya yang tinggi, mengalami pertumbuhan ekonomi yang tinggi sehingga menyebabkan peningkatan jumlah penduduk yang cukup pesat. Hal ini memicu pembangunan besar-besaran yang mengubah fungsi lahan di kawasan perkotaan. Oleh karena itu, perencanaan kawasan dengan sistem drainase yang memadai diperlukan untuk mencegah terjadinya banjir. Sungai Cileuwibangke, yang terletak di selatan Kota Bogor, mengalir melalui kawasan pemukiman yang akan dikembangkan menjadi kawasan komersial dan industri. Sehingga, perlu dilakukan evaluasi tinggi muka air banjir Sungai Cileuwibangke baik pada kondisi eksisting maupun setelah konstruksi. Studi ini menggunakan data harian Pos Hujan Gadog dan data jam-jaman satelit GPM dari tahun 2001 hingga 2020 untuk melakukan analisis curah hujan. Ditemukan bahwa beberapa kejadian hujan memiliki nilai lebih besar dari hujan rencana periode ulang 2, 5, dan 10 tahun. Berdasarkan analisis curah hujan-limpasan yang dilakukan, diketahui bahwa alih fungsi lahan mengakibatkan peningkatan debit banjir puncak dan volume limpasan masing-masing sebesar 35-36% dan 22-28% dibandingkan dengan kondisi eksisting. Hasil penelitian menunjukkan bahwa normalisasi ruas sungai di sisi pemukiman tidak menurunkan debit banjir secara signifikan, dikarenakan adanya tiga gorong-gorong berdimensi lebar pada kawasan tersebut. Selain itu, perlu dilakukan perkuatan dasar sungai dan bantaran sungai dikarenakan adanya indikasi loncatan hidraulik. Perlindungan dasar sungai dapat dilakukan di hulu dengan menggunakan material batuan sepanjang 35 m.Keywords: Banjir Perkotaan, HEC-HMS, HEC-RAS, Kota Bogor, dan Sungai Cileuwibangke

Correction and Validation of Daily Rainfall Satellite Data in the Wae Mese Watershed, Labuan Bajo, West Manggarai Regency Yudarsi, Pankrasio Mario; Wicaksono, Albert; Wijaya, Obaja Triputera
International Journal of Science and Society Vol 7 No 1 (2025): International Journal of Science and Society (IJSOC)
Publisher : GoAcademica Research & Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54783/ijsoc.v7i1.1385

This study aims to analyze rainfall correction in the Wae Mese watershed, located in Labuan Bajo, focusing on improving the accuracy of rainfall data for flood modelling and watershed management planning. In this research, corrections are performed using an objective function that compares observed rainfall data with satellite-based rainfall data from GPM (Global Precipitation Measurement). The objective function is used to evaluate prediction errors and determine the most effective correction factor to enhance the reliability of satellite rainfall data. The research methodology includes the application of the objective function to measure differences between satellite-derived rainfall data and observed data, and applying corrections based on the analysis results. The findings show that rainfall data corrected using the objective function provides a more accurate representation of rainfall events, leading to more precise flood predictions for the watershed. This study highlights the importance of using the objective function in rainfall correction, which plays a key role in effective flood risk management and planning. These findings provide a better understanding of rainfall patterns in the Wae Mese watershed and support the use of corrected satellite-based rainfall data for hydrological modelling and future flood risk assessments.

GPM-based Conversion of Daily to Hourly Rainfall Data for Flood Modelling in Kuranji Cristobal, Jose; Yudianto, Doddi; Li, Qiaoling; Wicaksono, Albert
JURNAL TEKNIK HIDRAULIK Vol 16, No 1 (2025): 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.v16i1.812

Tapin District, located in the Kuranji Watershed of South Kalimantan Province, frequently experiences flooding due to heavy rainfall. Flood event simulation can be utilized to generate hourly discharge data for flood early warning systems, addressing the absence of observed hourly discharge data from the Kuranji Automatic Water Level Recorder (AWLR). Moreover, limited watershed parameters and the unavailability of hourly rainfall data pose challenges in developing a hydrological model for the Kuranji Catchment. To overcome this issue, the hourly rainfall distribution pattern from 10 Global Precipitation Measurement Mission (GPM) Satellite grids were used to convert daily rainfall observations recorded at the Talaga Langsat, Lok Paikat, and Tapin Utara rainfall stations Hourly rainfall data from each GPM grid were matched with several synthetic hourly rainfall distribution patterns. The chosen distribution pattern was subsequently applied to simulate flood events using the HEC-HMS model. Two flood events, dated 4–7 March 2017 and 21–23 March 2018, were used for trial fitting to estimate catchment parameters. Simulated hourly discharges were compared with daily discharge data from the AWLR at Kuranji station, using Total Relative Volume Error (TRVE) and Root Mean Square Error (RMSE) as performance indicators. The simulation results demonstrate that daily-to-hourly rainfall conversion is applicable for estimating catchment parameters, with average TRVE and RMSE values of 1.955% and 7.025 m³/s, respectively. Furthermore, the trial fitting results indicate that the simulated discharge values align well with observed peak daily discharge data. Acquiring and incorporating hourly discharge data would enhance the accuracy of daily-to-hourly rainfall conversion by synchronizing the temporal resolution. Additionally, incorporating more flood events into trial fitting tests could produce more robust and representative outcomes.

Evaluating the Performance of HEC-RAS in Simulating Strongly Nonlinear and Dispersive Wave Propagation Rahmanto, Fiqih; Wicaksono, Albert
Jurnal Teknik Sipil Vol 25, No 2 (2025): Vol 25, No 2 (2025): JURNAL TEKNIK SIPIL EDISI MEI 2025
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jts.v25i2.92675

Understanding wave propagation, particularly in shallow water where nonlinear and dispersive effects become prominent, is essential for achieving accurate hydraulic modeling. HEC-RAS is a widely utilized computational tool in engineering applications for simulating open channel flows, predominantly under the assumption of hydrostatic pressure. This study investigates the capability of HEC-RAS to simulate wave propagation under conditions characterized by strong nonlinearity and dispersion. To conduct this evaluation, three benchmark scenarios were modeled: (1) solitary wave propagation in a flat, frictionless channel, (2) interaction of a solitary wave with a submerged bar, based on experimental data, and (3) regular wave propagation. Each case was simulated using HEC-RAS and the results were compared against analytical solutions or experimental observations. The findings indicate that HEC-RAS exhibits notable limitations in accurately representing wave phenomena dominated by nonlinear and dispersive effects. These limitations are primarily attributed to the shallow water equations implemented in the model, which omit non-hydrostatic pressure components. Such components are critical for maintaining wave shape and amplitude, particularly over variable bathymetry. In conclusion, while HEC-RAS remains a robust and reliable tool for conventional flow modeling, it is not well-suited for scenarios involving strongly nonlinear and dispersive wave propagation. For such cases, alternative modeling approaches that incorporate non-hydrostatic pressure effects are recommended to ensure greater simulation accuracy.

Co-Authors Akafi, M. Ma'ruf Bambang Adi Riyanto Bobby Minola Ginting Cleon Christopher Cleon Christopher Cristobal, Jose Doddi Yudianto Farrell Wiguna Farrell Wiguna Finna Fitriana Fiona, Megan Fitriana, Finna Li, Qiaoling Li, Ren Rahmanto, Fiqih Tandiono, Felix Theo Senjaya Wijaya, Obaja Triputera Willy Willy Xie Yuebo Yudarsi, Pankrasio Mario

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