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All Journal Jurnal Konstruksi Journal of Geoscience, Engineering, Environment, and Technology Jurnal Konstruksi Innovative: Journal Of Social Science Research
Sulwan Permana
Institut Teknologi Garut
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Evaluasi Kapasitas Kolam Retensi PT. Tactical Garment Garut Menggunakan Storm Water Management Model 5.2 Sulwan Permana; Ayu Nur Isti Ajijah
Jurnal Konstruksi Vol 24 No 1 (2026): Jurnal Konstruksi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/konstruksi/v.24-1.1652

Abstract

Flooding is a serious problem that often occurs due to uncontrolled land use change. This study aims to evaluate the capacity of the retention pond at PT Tactical Garment Garut in controlling runoff using the Storm Water Management Model (SWMM) version 5.2. PT Tactical Garment Garut, located in Haruman Village, Leles Subdistrict, Garut Regency, faces challenges in managing runoff due to the conversion of vegetated land into covered land for the construction of an apparel industry. The research method involved hydrological and hydraulic modeling using SWMM to calculate the 5-year and 10-year return period channel discharge, and determine the effectiveness of the existing retention ponds. The modeling results showed that the retention pond was able to accommodate a maximum runoff of 89.55 m³/sec for 6 hours. The maximum inflow (total water discharge) into the retention pond is 961.29 m³. However, the calculation of the effectiveness of the retention pond shows that the retention pond is only able to cope with 1.04% of the incoming flood volume, which indicates that the capacity of the retention pond is inadequate. This study suggests further evaluation of the capacity of the retention pond as well as possible expansion or infrastructure improvements to enhance the flood handling capability of the area.
Potensi Debit Banjir Berdasarkan Periode Ulang 5 Tahunan Sub Das Ciojar Farhan Fauzaan A; Sulwan Permana
Jurnal Konstruksi Vol 24 No 1 (2026): Jurnal Konstruksi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/konstruksi/v.24-1.1684

Abstract

Flooding is one of the most frequent and destructive natural disasters, impacting human lives and causing economic damage. According to data from the Indonesian National Disaster Management Agency (BNPB), there were 920 flood incidents recorded in West Java between 2014 and 2023. One major flood event occurred in the Cimanuk River, Garut Regency, in 2016, resulting in significant damage to the surrounding areas. The Cimanuk River is part of a watershed that includes several tributaries or sub-watersheds (Sub-DAS) with potential to cause flooding. The Ciojar Sub-watershed, located in Garut Regency, is one such tributary that frequently contributes to flooding. It flows through residential areas, plantations, and rice fields. Most of the land around the Ciojar Sub-watershed is used for agriculture, while some residential areas lie at lower elevations, making them especially vulnerable to flooding.This study adopts a quantitative approach to analyze the frequency and impact of floods in the region. It has two main objectives: to identify the months and years in which rainfall exceeded the five-year flood threshold (Q5), and to predict flood events exceeding Q5 from 2024 to 2027. Flood discharge was calculated using the Synthetic Unit Hydrograph method from the Soil Conservation Service (SCS), while flood predictions were simulated using an Artificial Neural Network (ANN) Backpropagation method with MATLAB software.The analysis of flood discharge based on a five-year return period for 2014 to 2023 yielded the following values: 99.250 m³/s (2014), 10.459 m³/s (2015), 162.367 m³/s (2016), 194.384 m³/s (2017), 149.485 m³/s (2018), 168.318 m³/s (2019), 162.218 m³/s (2020), 8.870 m³/s (2021), 233.587 m³/s (2022), and 124.346 m³/s (2023).The predicted flood discharges for the five-year return period from 2024 to 2027 are: 128.513 m³/s (2024), 93.488 m³/s (2025), 78.318 m³/s (2026), and 172.255 m³/s (2027).
Kajian Banjir Daerah Aliran Sungai Cilaki Cianjur-Garut Noni Nuraeni; Sulwan Permana
Jurnal Konstruksi Vol 24 No 1 (2026): Jurnal Konstruksi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/konstruksi/v.24-1.1730

Abstract

The Cilaki River stretches from upstream Pangalengan - Talegong to its downstream at the Cilaki bridge, the longest bridge in South Garut. According to BPBD volunteers on December 25, 2021, the Cilaki River Cianjur - Garut experienced very high rainfall which resulted in flooding that closed the main route connecting between regencies in Kertajadi Village, Cidaun District, Cianjur Regency, West Java Province submerged in floods as high as one meter. Therefore, this research aims to identify the planned flood discharge and analyze the inundation area in the Cilaki watershed using the HEC-RAS application, with the simulation results used to determine the level of flood vulnerability. The methods used include field surveys, hydrological analysis for the calculation of flood discharge according to the watershed area using the HSS Nakayasu method, and prediction of water levels through HEC-RAS for estimation of inundation area. The results showed a peak discharge at the 6th hour with a discharge of 403.17 m³/sec for a 25-year return period, 415.35 m³/sec for 50 years, and 424.58 m³/sec for 100 years. The inundation area reached 13,190 ha at the 25-year return period, 15,003 ha at 50 years, and 16,700 ha at 100 years.
Analisis Sistem Drainase Pada Kawasan yang Terdampak Banjir di Daerah Panembong Tutin Mustaatinah; Sulwan Permana
Jurnal Konstruksi Vol 24 No 1 (2026): Jurnal Konstruksi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/konstruksi/v.24-1.1974

Abstract

Flooding is a natural disaster that frequently occurs in Indonesia. One of the main causes of flooding is the inability of drainage channels to convey water effectively and efficiently. One area that often experiences flooding is Kampung Nangoh, Panembong Village. The factors causing flooding in this area include low-lying topography, accumulated waste, sedimentation buildup in the channels, and inadequate drainage maintenance systems. To address flooding problems, a drainage system analysis is required. This analysis involves calculating the design flood discharge and determining channel dimensions capable of accommodating the planned discharge. The results of the study show that the design flood discharges for return periods of 2, 5, 10, 25, and 50 years using the Normal method are 14.48222 m³/s, 16.3194 m³/s, 17.2351 m³/s, 18.1285 m³/s, and 18.7163 m³/s, respectively. Using the Log Normal method, the design flood discharges are 14.4588 m³/s, 16.0149 m³/s, 17.0230 m³/s, 18.1053 m³/s, and 18.8757 m³/s, respectively. The channel dimensions capable of accommodating the design flood discharge using the Normal method for return periods of 2, 5, 10, 25, and 50 years are 2 × 1 m, 2 × 1 m, 2 × 1 m, 2.2 × 1.1 m, and 2.2 × 1.1 m, respectively. For the Log Normal method, the required channel dimensions for return periods of 2, 5, 10, 25, and 50 years are also 2 × 1 m, 2 × 1 m, 2 × 1 m, 2.2 × 1.1 m, and 2.2 × 1.1 m, respectively.
Perencanaan Embung Sebagai Upaya Pengendalian Banjir di Kecamatan Cikampek Kabupaten Karawang Sin Sin Husnul Rizal; Sulwan Permana
Jurnal Konstruksi Vol 24 No 1 (2026): Jurnal Konstruksi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/konstruksi/v.24-1.1977

Abstract

The Cigelam Sub-watershed is located in the Cikarokrok watershed area in Cikampek Sub-district, Karawang Regency. Seasonal flooding is a concern, a fear for the local community. Hydrological analysis and reservoir design planning are emergency responses to natural disaster flooding events. The purpose of the research conducted this time was to calculate the design flood discharge of the Cigelam river, and flood control in Cikampek District. This research uses the Snyder Hydrograph method by designing the design rainfall and then testing the Chi Square distribution and the Smirnov - Kolmogorov Test. The design of the reservoir becomes the final stage of the research after the design flood discharge is obtained. The calculation obtained a maximum discharge of 1.266 m3/det and a planned flood discharge = 318.272 m3/det. The result of the calculation is the amount of design flood discharge with a 2-year return period (Q2) of the Cigelam river of 104.47 m3/det, (Q5) =161.71 m3/det, (Q10) = 199.61 m3/det, (Q25) = 247.49 m3/det, (Q50) 283.013 m3/det, (Q100) = 318.27 m3/det. The effective storage volume of the Cigelam river reservoir is 153,686.05 m3. The maximum amount of flood discharge that enters the reservoir when the Cigelam river reservoir is planned is 17.79 m3/det. This research contributes to the management of Cigelam river water resources in Cikampek District.
Analisis Genangan Air di Kampung Sudika Indah Kecamatan Tarogong Kidul Kabupaten Garut Lukman Rudiat; Sulwan Permana
Jurnal Konstruksi Vol 24 No 1 (2026): Jurnal Konstruksi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/konstruksi/v.24-1.2005

Abstract

Flooding, or what is often referred to as flooding, is a very common disaster in Indonesia. There is a case in a residential area near the Cimanuk River, namely in Kampung Sudika Indah RT 02 RW 13, Tarogong Kidul District, Garut Regency. Flooding often occurs, which is thought to be caused by the drainage system, so that the water discharge and high rainfall intensity over a long period of time cannot be accommodated and drained to the outlet. This is one of the main factors contributing to flooding. Therefore, research is needed on what has happened so that the incident can be evaluated and a solution found. The purpose of this study is to analyze the dimensions of the drainage channels in Kampung Sudika Indah. In this study, the method used is to process the maximum rainfall using the Log Pearson Type III method, then test it using the Chi-Square and Smirnov-Kolmogorov methods. Next, calculate the 10-year rainfall intensity. Simulation was carried out using the SWMM application. The SWMM application summary results showed that water overflow occurred in channel 4. The overflow occurred in channel 4, which had a peak overflow volume of 11.107 m3/sec with a duration of 1.20 hours. Therefore, based on the results of trials by changing the channel dimensions, it can be concluded that channel 4 requires an increase in the existing cross-sectional dimensions from 2.5 m x 2 m to 3.5 m x 2 m.
Optimasi Sistem Irigasi Dalam Meningkatkan Produktivitas Pertanian Desa. Cibunar, Kecamatan.Cibatu Adi Susetyaningsih; Sulwan Permana; Yoga Adela
Jurnal Konstruksi Vol 24 No 1 (2026): Jurnal Konstruksi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/konstruksi/v.24-1.2047

Abstract

The issue of water availability for agriculture has become a major challenge due to climate change and the need for improved water management. Irregular rainfall patterns and frequent water shortages pose a threat to crop productivity and farmers' livelihoods. Therefore, this study aims to analyze the uneven distribution of water availability throughout the year, particularly during the dry season. It also assesses water demand and supply using the FJ Mock method and the CROPWAT 8.0 software.The results of the study show that the dependable discharge of the Citameng IV Weir in April reaches 101.260 liters/second, while the water demand for 200 hectares of rice fields in Cibunar Village is 538.65 liters/second. Further analysis focuses on optimizing the irrigation system to enhance agricultural productivity in Cibunar Village, Cibatu District, Garut Regency.The study recommends the design of a trapezoidal irrigation channel lined with stone to efficiently convey water to agricultural land. For an area of 200 hectares, the proposed channel dimensions include a top width of 4.56 meters, a bottom width of 1.23 meters, a water depth of 0.65 meters, and a freeboard height of 0.46 meters.In addition, the study suggests optimizing irrigation system management by involving local communities and developing a more effective water distribution schedule to prevent conflicts among farmers. The construction of weirs or reservoirs is also recommended to regulate water availability more evenly, thereby improving agricultural productivity.
Evaluasi Kapasitas Sistem Drainase Permukiman Untuk Mitigasi Banjir di Kampung Cipicung Banyuresmi Sulwan Permana; Alwin Andika
Jurnal Konstruksi Vol 24 No 1 (2026): Jurnal Konstruksi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/konstruksi/v.24-1.2097

Abstract

Land conversion from green open space to residential areas reduces groundwater infiltration, while lack of maintenance of the drainage system leads to clogged channels. This study aims to evaluate the capacity of the residential drainage system in Cipicung Village, Banyuresmi Sub-district, to reduce flood risk using EPA SWMM 5.2. These floods not only cause economic losses but also disrupt daily activities and threaten the health and safety of residents. In this study, the method used was to process the maximum rainfall with the log person type III method and then tested with the chi-square and Smirnov-Kolmogorov methods. Furthermore, it calculates the rain intensity of the 5-year and 10-year return periods. Simulations use the EPA SWMM 5.2 application, to design drainage. The summary results of the EPA SWMM 5.2 application show that water overflow occurs. Overflow occurs in Channels 2 and 3 which have a peak overflow volume of 0.442 m3 / s with a duration of 4.52 hours and 0.340 m3 / s with a duration of 4.51 hours. So based on the results of trials by changing the dimensions of the channel, it can be concluded that Channels 2 and 3 are required to increase the dimensions of the existing cross section for the 5-year return period is 1.5 m x 1 m and in channel 3 is 1.2 m x 0.85 m. while for the 10-year return period is 1.7 m x 1 m and in channel 3 is 1.4 m x 0.85 m. The 10-year return period experienced an increase in discharge. The 10-year return period experienced an increase in planned discharge by 70%.
Pengaruh Perubahan Tata Guna Lahan Terhadap Debit Banjir Menggnakan Model HEC-HMS Sulwan Permana; Adi Muhammad Aripin
Jurnal Konstruksi Vol 24 No 1 (2026): Jurnal Konstruksi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/konstruksi/v.24-1.2703

Abstract

Perubahan penggunaan lahan merupakan salah satu faktor dominan yang memengaruhi karakteristik hidrologi suatu daerah aliran sungai (DAS). Penelitian ini bertujuan mengevaluasi pengaruh perubahan penggunaan lahan terhadap debit banjir. Penelitian ini menggunakan pemodelan hidrologi dengan HEC-HMS berbasis metode Soil Conservation Service Curve Number (SCS-CN). Simulasi dilakukan untuk kondisi penggunaan lahan tahun 2014, 2019, dan 2023 dengan curah hujan rancangan berdurasi 6 jam pada kala ulang 25, 50, dan 100 tahun. Hasil simulasi menunjukkan bahwa nilai CN rata-rata mengalami peningkatan dari 82,05 (2014) menjadi 82,33 (2023), seiring dengan peningkatan luas lahan kedap air dari 4,3% menjadi 6,4%. Konsekuensinya, terjadi penurunan nilai retensi (S) dan initial abstraction (Ia), serta peningkatan debit puncak. Debit maksimum pada periode ulang 100 tahun meningkat dari 218,4 m³/s menjadi 221,6 m³/s. Hasil penelitian ini memberikan dasar teknis dalam mitigasi banjir berbasis tata rang. Hal ini menunjukkan bahwa alih fungsi lahan memberikan kontribusi signifikan terhadap peningkatan potensi banjir. Pengendalian konversi lahan serta penerapan konservasi tanah dan air untuk mengurangi risiko banjir.
Evaluasi Kapasitas Tampungan Saluran Drainase Menggunakan Storm Water Management Model Sulwan Permana; Azqia Fhairiza Rusmana
Jurnal Konstruksi Vol 24 No 1 (2026): Jurnal Konstruksi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/konstruksi/v.24-1.2760

Abstract

Population growth and land use change in Sukagalih Village, Garut Regency, have increased surface runoff volume, triggering flooding at several points in the drainage system. This study aims to evaluate the drainage system's storage capacity using Storm Water Management Model (SWMM) modeling and provide technical recommendations for improving its performance. The method used is quantitative descriptive with primary data in the form of survey results on the physical condition and dimensions of the channels, as well as secondary data including rainfall, topography, and land use. Hydrological analysis was carried out through the calculation of planned rainfall using a normal distribution, rainfall intensity using the Mononobe method, and rainfall distribution using the Alternating Block Method. The SWMM simulation results showed that six junctions (JN27, JN29, JN30, JN32, JN36, and JN51) experienced overflow during peak rainfall due to sedimentation, wild vegetation, and channel dimension limitations. The technical evaluation recommended routine cleaning, sediment removal, and channel dimension improvement at vulnerable points. The application of these recommendations in a re-simulation showed an improvement in flow capacity and a reduction in overflow, thereby increasing the effectiveness of the drainage system in controlling flooding in Sukagalih Village. The results of this study can be used as a reference in planning a sustainable urban drainage system.
Co-Authors , Sahrirudin Abdal Azziz Abdullah Syafe'i Aceng Nurkholis Majid Adhitya Surya Pratama Adi Muhammad Aripin Adi Susetyaningsih Aditya Ramdhani Pratama Adri Triadi Agun Gunawar Ai Dini Andriani Almiansyah Nurdin Alwin Andika Andri Setiawan Anjas Ninda Hantari Annisa Nur Ilham Al-Jabbar Ayu Nur Isti Ajijah Azka Mutsla Fauzan Azqia Fhairiza Rusmana Dendi Yogaswara Denny Firmansah Depi Prayogi Diana Puspa Ramadhan Dicky Muhamad Fadli Eko Walujodjati Eko Walujodjati Endang Adi Juhana Endang Andi Juhana Erwin Nadinoor Fajar Abdul Aziz Farhan Fauzaan A Febri Gumilar Hadi Nurhuda Hanifah Nurfauziah Hendi Hamdani Ida Farida Ida Farida Indra Lukman Nul Hakim Irgi Agustian Ita Warsita Jani Albas Lukman Rudiat M. Sandi Kurniawan Saputra Martha Puspa Vaniati Mirza Fathir Moch Lukman Nul Hakim Muhamad Alwan Fauzan Muhammad Diki Paris Muhammad Nur Azmi Muthi’ah Hudaedi Neng Nenti Fajriyanti Noni Nuraeni Pamella M. Sri Rezeki Rena Ruspa Rian Hidayatullah Ridwan Alamsyah Rika Banowati Risna Merliana Rizal Nurhakim Rizki Kurniawan Robby Maulana Sopa Roestaman Roestaman Roestaman Roestaman Sena Arian Sin Sin Husnul Rizal Siti Ulpah Nurazizah Siti Yuni Yuningsih Sofa Tsuroya Aulya Subhan Mulyana Taupik Saepul Rohman Tendi Rismansyah Tintin Kartini Tri Astita Gunawan Tutin Mustaatinah Widya Prima Mulyana Yaumil Wahdan Yoga Adela Yuda Yudistira Yusri Fisabili Shaffan