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All Journal International Journal of Electrical and Computer Engineering Indonesian Journal of Geography Jurnal Teknik ITS IPTEK Journal of Proceedings Series IPTEK The Journal for Technology and Science Jurnal Teknik Sipil Journal of Civil Engineering Jurnal Teknik Sipil JURNAL ILMIAH GEOMATIKA Jurnal Aplikasi Teknik Sipil Jurnal Hidroteknik Borneo Engineering : Jurnal Teknik Sipil Specta Journal of Technology Civilla : Jurnal Teknik Sipil Universitas Islam Lamongan Matriks Teknik Sipil Journal of Social Research Makara Journal of Technology Sewagati
Umboro Lasminto
Institut Teknologi Sepuluh Nopember
Arts Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Mechanical Engineering Public Health Social Sciences Transportation Other

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Journal : Journal of Civil Engineering

 1 
Comparison of Flood Hydrograph of Manikin Dam Watershed Using Synthetic Unit Hydrograph Method, HEC-HMS and Rain on Grid Model with HEC-RAS 2D Pukan, Mariano Ado Galot; Lasminto, Umboro
Journal of Civil Engineering Vol 40, No 1 (2025)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v40i1.22124

Abstract

Manikin watershed is located in Kuaklalo Village which borders Bokong Village, Taebenu Subdistrict, Kupang Regency, East Nusa Tenggara Province which has an area of 49.31 km2 with a river length of 8.62 km which has a semi-arid climate with a fairly high annual rainfall of around 1000 - 1500 mm. This study aims to compare the design flood discharge and peak hour with Nakayasu Synthetic Unit Hydrograph (HSS) method, GAMA I, HEC-HMS and rainfall discharge model with HEC_RAS 2D in Manikin Dam watershed. In this study, 6-hour rainfall with a return period of 50 years and 100 years was used. Based on the analysis results, the calculation of the hydrological numerical model flood discharge with the HEC-HMS method with a return period of 50 years and 100 years is 511.90 m³/s and 599.30 m³/s with a peak time at the 4th hour. The peak discharge values obtained using the Nakayasu Synthetic Unit Hydrograph and GAMA I methods with a return period of 50 years and 100 years are 342.11 m³/s, 381.14 m³/s and 406.44 m³/s, 456.13 m³/s, and the peak time obtained at SUH Nakayasu is 3 hours and GAMA I is 4 hours. Numerical model results with HEC-RAS 2D v6.6 with 6 hours of rainfall on the grid obtained peak discharge hydrograph values for the 50-year and 100-year return periods of 494.86 m³/s and 604.88 m³/s, with the peak time at the 5th hour. Therefore, the largest peak discharge and peak time results were obtained from the HEC-HMS method among the three SUH formulas and HEC-RAS calculations.
Enhancing Flood Detection in Surabaya: A Comparative Study of VV and VH Polarizations with Sentinel-1 Data Ashilah, Hafizhah; Lasminto, Umboro
Journal of Civil Engineering Vol 40, No 1 (2025)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v40i1.22329

Abstract

Flood mapping is critical to strengthen urban resilience, particularly in Surabaya, where flooding is a major and recurring threat. Sentinel-1 satellite data offers significant advantages for flood model calibration due to its high-resolution imagery and frequent revisits. This study utilizes Google Earth Engine to process and analyse Sentinel-1 data for mapping flood extents using two different polarizations: VV and VH. The research compares the capabilities of these polarizations in detecting flood areas. The results show that VV polarization consistently identifies a larger flood area compared to VH polarization under similar processing conditions. However, the Kappa coefficient was used to assess classification accuracy, with VV achieving a Kappa of 0.8 and VH reaching a higher Kappa of 0.92, reflecting better classification performance. These findings suggest that while VV provides a broader flood detection, VH offers more reliable flood mapping, highlighting the trade-offs between sensitivity and accuracy in flood monitoring using Sentinel-1 satellite.
Sensitivity Analysis of Calibration in the Water Evaluation And Planning (WEAP) Model for Water Resource Management in Keyang, Slahung, Sungkur Watershed Dianeka, Belia Tatika Arno; Lasminto, Umboro
Journal of Civil Engineering Vol 40, No 2 (2025)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v40i2.22653

Abstract

Water availability becomes an important issue as the population increases due to limited water resources not proportional to the increasing demand. The Keyang, Slahung, and Sungkur sub-watersheds in Ponorogo Regency, East Java, face drought during the dry season and flooding during the wet season. This research aims to analyse water availability by considering irrigation needs and cropping patterns, and provide recommendations for the allocation of water supply from surface water for efficient use in the next 30 years. Water Evaluation And Planning (WEAP) application was used for the analysis, with trial and error method to adjust the parameter values. The optimum parameter values obtained were Z1 = 0, Z2 = 0, DWC = 1000, DC = 100, RRF = 2, RZC = 300, SWC = 1000, and PFD = 0.05. Based on these optimum parameters, the model interpretation of NSE is 0.825 (good category), RMSE 11.923 (good enough category), PBIAS 40.152 (good enough category), R2 (medium influence category), and MAPE 0.873 (very accurate category). This model shows that the simulation results reflect the actual existing conditions.
Co-Authors Abdus Salam Afkarina Izzati Ahmad Dwi Cahyadi Aisyah Amelia Amrizal Amrizal Anak Agung Ngurah Satria Damarnegara Angela Jasmine Tanya Tjahyana Aninda Rahmaningtyas Anna A Misdanik Anwar, Nadjadji Ardelia Arlimasita Ashilah, Hafizhah Bagas Yoga Pratama Bahmid Tohari Bambang Sarwonno Bambang Sarwono Bangun Muljo Soekotjo Bangun Muljo Sukojo, Bangun Muljo Berlian Al Kindhi Brama Lesmono Budi Rahardjo Cahya Buana Catur Arif Prastyanto, Catur Arif Chandra Eko Prasetyo Chandra Murprabowo Mudjib Data Iranata Devy Amalia Dianeka, Belia Tatika Arno Dwi Retnowati Edijatno Edijatno Edijatno Edijatno Edijatno Edijatno Faradilla Ayu Rizki Shiami Farida Rahmawati Gemma Galgani Tunjung Dewandaru Habibur Rohman Hafidh Farisi Hendrata Wibisana Hera Widyastuti I Gede Tunas Irma Noor Fadhilla Istiar Jagad Dhita Kustyaningrum Jagad Dhita Kustyaningrum Lisna Isminingtyas Made Gita Pitaloka Maulana, Mahendra Andiek Mega Septia Sarda Dewi Mohamad Bagus Ansori Mohamad Bagus Ansori Muh. Fikri Ardwian Nastasia F Margini Nastasia Festy Marginia Novi Andriany Teguh Pukan, Mariano Ado Galot Rachmatika Nurita Rafika Nuramalia Riki Chandra Wijaya Riki Chandra Wijaya Risma Lupita Sari Rizaldi Firdaus Ardiyanto Rizky Saputra Rossana Margaret Kadar Yanti Safira Nur Afifah Sari, Putu Tantri Kumala Sarwono Sarwono Satria Damar Negara Satria Damar Negara Satria Damarnegara Satria Damarnegara Sharfina Cintantya Purwandani Sintya Maghfira Ismawati Sreenatha G. Anavatti Sukotjo, Bangun Muljo Tjahyana, Angela Jasmine Tanya Wahju Herijanto Wardoyo, Wasis Yang Ratri Savitri Yang Ratri Savitri Zakiyatun Nafisah Zharin F. Syahdinar