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Analisa Ketersediaan Air pada Embung di Desa Hegarmanah Kabupaten Cianjur Fauzan, Azka Mutsla; Permana, Sulwan
Jurnal Konstruksi Vol 23 No 2 (2025): Jurnal Konstruksi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/konstruksi/v.23-2.1425

Abstract

Cianjur Regency has hydrological potential in the form of rivers and beaches. However, there is still a problem of water shortage. One of the areas experiencing this problem is the Karangtengah Subdistrict area in Hegarmanah Village. When the dry season arrives, the available water is not able to meet the needs of the community. Hegarmanah Village itself has a water source from the river and actually already has a clean water network. However, the clean water network is not functioning due to pumping and water availability issues. To overcome the availability of water in the area, it is necessary to build a facility, namely embung. Embung Hegarmanah is an embung built in Cianjur Regency, precisely in Hegarmanah Village. The research conducted this time, calculating the amount of water availability and needs to meet the irrigation needs of Hegarmanah embung. The method used in this research is quantitative method. In finding the amount of water availability and needs, it is necessary to calculate the incoming discharge and outgoing discharge at Embung Hegarmanah. The results of this study found that there was a water shortage in August of 104.3 l / s, with a land area of 32.52 Ha. Water shortages occur because in August the rainfall is low and farmers are processing crops for the planting period.
Perencanaan Distribusi Air di Desa Ciela Kecamatan Bayongbong Hidayatullah, Rian; Permana, Sulwan
Jurnal Konstruksi Vol 23 No 2 (2025): Jurnal Konstruksi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/konstruksi/v.23-2.1431

Abstract

Water use is one of the most vital aspects of human life, essential not only for household needs but also for public, economic, and social infrastructure. One such area is Ciela Village, located in Bayongbong District, which is currently facing problems of uneven water distribution. This study aims to design a water distribution network system using EPANET 2.0, analyze population growth data for the next ten years by comparing two projection methods—arithmetic and geometric—and calculate water demand from both domestic and non-domestic sectors based on the Planning Criteria of the Directorate General of Human Settlements, Ministry of Public Works and Housing. Data collection in this study used a descriptive qualitative method, which included population data, topographic maps, and administrative boundaries. Water discharge was measured using a simple method involving a stopwatch, ruler, and a calibrated container with a known volume. The results show that the projected population of Ciela Village in the next ten years will reach 7,091 people. The Cikahuripan spring, which serves as the main water source for the plan, is capable of meeting community needs until 2033, as evidenced by a measured discharge of 6.4 liters/second, while the required discharge for the next ten years is 5.327 liters/second. The proposed distribution network design uses HDPE pipes with a 6-inch diameter, and the selected pump type is a Vertical Multistage Centrifugal Pump CR 10-14, chosen based on the pump head calculation results from EPANET 2.0. The main storage reservoir requires a capacity of 552.268 m3, while the service reservoir requires a capacity of 51.421 m3. Overall, this study demonstrates that the Cikahuripan spring can sustainably support the projected water demand for the next decade and provides a technically sound plan for improving the water distribution system in Ciela Village.
Pemodelan Banjir Di Cimacan Kecamatan Tarogong Kidul Kabupaten Garut Permana, Sulwan; Nurdin, Almiansyah
Jurnal Konstruksi Vol 23 No 2 (2025): Jurnal Konstruksi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/konstruksi/v.23-2.1485

Abstract

Cianjur Regency has hydrological potential in the form of rivers and beaches. However, there is still a problem of water shortage. One of the areas experiencing this problem is the Karangtengah Subdistrict area in Hegarmanah Village. When the dry season arrives, the available water is not able to meet the needs of the community. Hegarmanah Village itself has a water source from the river and actually already has a clean water network. However, the clean water network is not functioning due to pumping and water availability issues. To overcome the availability of water in the area, it is necessary to build a facility, namely embung. Embung Hegarmanah is an embung built in Cianjur Regency, precisely in Hegarmanah Village. The research conducted this time, calculating the amount of water availability and needs to meet the irrigation needs of Hegarmanah embung. The method used in this research is quantitative method. In finding the amount of water availability and needs, it is necessary to calculate the incoming discharge and outgoing discharge at Embung Hegarmanah. The results of this study found that there was a water shortage in August of 104.3 l / s, with a land area of 32.52 Ha. Water shortages occur because in August the rainfall is low and farmers are processing crops for the planting period.
Perencanaan Keseimbangan Air pada Embung Bratayudha Yuningsih, Siti Yuni; Permana, Sulwan
Jurnal Konstruksi Vol 23 No 2 (2025): Jurnal Konstruksi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/konstruksi/v.23-2.1521

Abstract

Water balance in the planning of Embung Bratayudha is one of the efforts to control flooding when runoff or high water discharge in the rainy season and to meet the needs of the community for the availability of raw water for irrigation. Based on this, research is needed to analyze the water balance planning at Bratayudha Embung, so that the needs and availability of water in the embung will be known. The method used in this research is a quantitative approach by analyzing primary data obtained through field surveys and secondary data obtained from Kepakan Station Post and the Garut Regency Public Works and Spatial Planning Office.The results of the NRECA analysis conducted can be known water availability discharge of 0.3014 m³/s where this discharge is obtained from the mainstay discharge with a probability of 80%, and the water demand discharge of 0.28 m³/s. From the analysis of the K factor that compares the discharge of availability and needs, the amount of 1.048 m³/s is obtained, where if the value of K ≥ 1 then the availability of water can be fulfilled, so the water balance of the reservoir is balanced.
Pengaruh Penambahan Serat Sabut Kelapa Pada Kuat Tekan dan Kuat Tarik Belah Beton Self Compacting Concrete Permana, Sulwan; Shaffan, Yusri Fisabili
Jurnal Konstruksi Vol 23 No 2 (2025): Jurnal Konstruksi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/konstruksi/v.23-2.1535

Abstract

Previous researchers have tried to find alternative concrete mixtures that are economical and environmentally friendly. One of the alternative additives developed is coconut fiber waste. The purpose of adding coconut fiber is to determine its effect on testing the compressive strength and split tensile strength of SCC (Self Compacting Concrete) concrete with a mixture percentage of 6%, 8%, and 10%. As for the addition of chemical substances, superplasticizer admixture aims to facilitate SCC concrete in achieving a qualified slump flow value. Research method. The research method applied is experimental compressive strength and split tensile strength of concrete with cylindrical shape with a mixture of added materials. The results of compressive strength testing obtained a normal concrete value of 16.30 MPa, then a mixture of 6% coconut fiber with a value of 17.26 MPa increased the normal concrete value by 5.88%, 8% coconut fiber with a value of 15 MPa decreased by 7.98%, and 10% coconut fiber with a value of 6.61 MPa decreased by 59.51%. For the tensile strength test results, obtained normal concrete worth 6.29 MPa then 6% coconut fiber mixture with a value of 7.10 MPa increased against the normal concrete value by 12.88%, 8% coconut fiber mixture concrete with a value of 6.60 MPa increased by 4.93%, and 10% coconut fiber mixture concrete with a value of 3.33 MPa decreased by 47.54%.
Pemodelan Debit Banjir Sungai Cimoyan Kabupaten Serang - Banten Permana, Sulwan; Azziz, Abdal
Jurnal Konstruksi Vol 23 No 2 (2025): Jurnal Konstruksi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/konstruksi/v.23-2.1578

Abstract

Flooding is defined as the overflow of water in large quantities. It is caused by heavy rainfall, land surfaces being lower than river or sea levels, locations situated in basins surrounded by mountains, and low water absorption capacity. Like many rivers in Indonesia, the Cimoyan River is experiencing severe degradation. Population growth and economic development have led to land-use changes in the watershed (DAS) area. As a result, there has been an increase in peak flood discharge, erosion, landslides, and a decline in baseflow. Additionally, the river faces problems such as waste accumulation, sediment buildup, and human settlement along its banks. Flooding in the Cimoyan River has inundated hundreds of homes in the area, causing significant economic losses including property and infrastructure damage. Downstream communities often suffer crop failures due to the river’s overflow. The purpose of this study is to determine the design flood discharge using the Nakayasu and Snyder synthetic unit hydrograph (HSS) methods for the Cimoyan River. The method used in this study to assess the cross-sectional capacity of the Cimoyan River through HEC-RAS software is a quantitative approach. Thus, the quantitative data were analyzed using statistical techniques. Based on hydrological analysis, the peak flood discharge using the Nakayasu method (Q100) is 813.97 m³/s, occurring at 02:45, while the peak discharge from the Snyder method (Q100) is 484.61 m³/s at 06:29. The cross-sectional capacity of the Cimoyan River, as calculated with HEC-RAS, shows that most sections of the river are safe from overflow.
Desain Sistem Pemanenan Air Hujan untuk Mengurangi Defisit Air Bersih di Kota Bandung Syafe'i, Abdullah; Permana, Sulwan; Susetyaningsih, Adi
Jurnal Konstruksi Vol 23 No 2 (2025): Jurnal Konstruksi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/konstruksi/v.23-2.1741

Abstract

Bandung City faces great challenges in meeting the demand for clean water due to rapid population growth and urbanization. This study aims to design a rainwater harvesting (RWH) system to reduce the water deficit. The method approach used includes hydrological analysis using the Mononobe method to calculate rainfall intensity, and the use of the Japanese Rational method to design the water storage system. The results showed that the RWH system is able to store 29,871.6 m³ of rainwater per year, which is equivalent to a 6.28% reduction in water deficit. The system has the potential to contribute significantly to water resource management and groundwater conservation in urban areas.
Analisis Sedimentasi Pada Bendung Cadasgantung Desa Sindangsari Kecamatan Cigedug Kabupaten Garut Prayogi, Depi; Susetyaningsih, Adi; Permana, Sulwan
Jurnal Konstruksi Vol 23 No 2 (2025): Jurnal Konstruksi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/konstruksi/v.23-2.2045

Abstract

Irrigation is a crucial component in the agricultural sector for enhancing productivity and ensuring food security. Adequate availability of irrigation water is essential for farmers to support crop cultivation activities. One of the most vital irrigation infrastructures is the weir, which functions to retain and raise the river water level so it can be diverted into irrigation channels.Cadasgantung Weir is located in Sindangsari Village, Garut Regency, West Java Province, at coordinates 07'18’04.1” S and 107'48’18.9” E. One of the main issues in the operation of weirs is sedimentation. Sediment accumulation in hydraulic structures can reduce storage capacity and affect the lifespan of the structure. This study aims to analyze the characteristics and quantity of sediment accumulated at Cadasgantung Weir. The analysis includes material type, particle size, sedimentation rate, and its impact on the weir’s functionality. The methods used involve numerical analysis using the HEC-RAS program and analytical calculations based on the Meyer-Peter Müller formula. The results show that the sediment at the weir is predominantly composed of medium-grained sand, with 60% of the particles having a diameter of 0.4641 mm. The sedimentation rate is highly influenced by water discharge, with a rate of 77.018 tons/day at base flow discharge, increasing to 607.736 tons/day at a 25-year return period (Q25). Meanwhile, at 50-year (Q50) and 100-year (Q100) return periods, the sedimentation rates are lower, recorded at 136.321 tons/day and 146.308 tons/day, respectively.Therefore, effective sediment management is necessary to maintain the optimal function of the weir.
Analisis Jarak Dilatasi SMPN 23 Kota Bogor terhadap Beban Gempa menggunakan Metode Statik Ekivalen Permana, Sulwan; M. Sri Rezeki, Pamella; Alwan Fauzan, Muhamad
Jurnal Konstruksi Vol 23 No 2 (2025): Jurnal Konstruksi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/konstruksi/v.23-2.2707

Abstract

Dilatasi merupakan celah yang memisahkan bagian bangunan dengan sistem struktur berbeda, umumnya digunakan pada bangunan dengan bentuk denah seperti T, L, atau U. Gedung SMPN 23 Kota Bogor memiliki bentuk bangunan asimetris dengan denah berbentuk L. Struktur bangunan terdiri dari susunan elemen konstruksi yang dirancang untuk menahan beban vertikal, seperti beban mati dan beban hidup, serta beban horizontal, seperti beban angin dan gempa. Kota Bogor sendiri dalam lima tahun terakhir telah mengalami 64 kejadian gempa, dengan gempa terbesar pada tahun 2023 berkekuatan magnitudo 5,4. Dalam penelitian ini, pemodelan struktur dilakukan dengan tiga variasi jarak dilatasi. Variasi pertama menggunakan jarak sesuai kondisi eksisting bangunan, variasi kedua menerapkan jarak yang lebih besar, dan variasi ketiga menggunakan jarak yang lebih kecil. Bangunan eksisting memiliki jarak dilatasi antar bangunan sebesar 50 mm. Pemodelan dilakukan menggunakan perangkat lunak SAP2000, dengan evaluasi struktur terhadap beban gempa melalui analisis simpangan antar lantai, torsi bawaan, dan P-Delta. Penentuan beban mengacu pada fungsi ruang masing-masing area. Analisis gempa dilakukan menggunakan metode statik ekivalen untuk menentukan variasi jarak dilatasi yang paling aman. Hasil analisis menunjukkan jarak minimum dilatasi yang dibutuhkan adalah 160 mm pada lantai 3, 100 mm pada lantai 2, dan 40 mm pada lantai 1. Berdasarkan temuan ini, jarak eksisting sebesar 50 mm hanya memenuhi ketentuan pada lantai 1.
Analisis Sedimentasi di Bendung Menggunakan Perangkat Lunak HEC-RAS Permana, Sulwan; Nenti Fajriyanti, Neng
Jurnal Konstruksi Vol 23 No 2 (2025): Jurnal Konstruksi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/konstruksi/v.23-2.2782

Abstract

The Copong Weir in Garut Regency is a hydraulic structure that functions as a provider of irrigation water; however, sedimentation problems often arise, reducing storage capacity and disrupting the weir’s function. Therefore, a quantitative study of sediment transport is needed to support more effective management. This study aims to analyze sedimentation at the Copong Weir using the HEC-RAS 6.6 software. The research stages include hydrological analysis using probability distributions to obtain design discharges, hydraulic analysis, and sediment transport simulations. The hydrological analysis results show peak discharges for return periods of 2 years at 453.37 m³/s, 5 years at 560.08 m³/s, 10 years at 625.66 m³/s, 25 years at 704.21 m³/s, 50 years at 759.43 m³/s, and 100 years at 814.87 m³/s. The HEC-RAS simulation produced Mass In Cum values that increased in line with higher discharges, ranging from 11,351.94 tons (Q2) to 18,743.90 tons (Q100). Meanwhile, Mass Bed Change Cum indicated both deposition and erosion variations. At Q2, deposition of 51.64 tons occurred, whereas from Q5 to Q100 erosion predominated, with the highest value at Q100 reaching -3,291.73 tons. These results confirm that higher discharges accelerate riverbed erosion and increase the volume of transported sediment. Thus, HEC-RAS 6.6 can be effectively used to analyze sedimentation at the Copong Weir. The findings provide a quantitative picture of the relationship between discharge and sedimentation and can serve as a reference for planning sediment management to maintain the weir’s function optimally.
Co-Authors AA Sudharmawan, AA Adi Susetyaningsih Ahmad Tavip Baiturahman Al-Husein, Fajar Alfaruq, Muhammad Haikal Alwan Fauzan, Muhamad Aminah, Siti Nur ANANTA, ASTI Andriani, Ai Dini Anwarushofa, Whina Anzilal Fauji Aprilianti, Mega Arif, Zaenal Azziz, Abdal Bayan, Alamahul Dadang Permana Eko Walujodjati Fadhil, Raja Naufal Fahril Sidik Alfarizi Fardiansyah, Bagas Farhani, Siti Aulia Faridah, Nayla Nur Fatah, Muhamad Abdu Fathir, Mirza Fauzan, Azka Mutsla Fijannatika, Nazma Naya Firdaus Irawan, Ferdy Firdausa, Muhamad Arga Firzatullah, Belva Prana Fitriyadi, Adi Giandhani, Mochammad Rizky Gunawar, Agun Hadi, Muhamad Rizal Nurul Halimah, Silfi Nur Hantari, Anjas Ninda Hariri, Rapi Muhamad harom, Ardi Nur Hermawan, Tizar Azjah Hilmayanti, Hilmayanti Hudaedi, Muthi’ah Ibrahim, Galih Imamudin Imamudin Jamami, Yadziz Siddik Al Khaerunisa, Nisrina Komalasari, Amelia Citra Mulya Kristiawan, Diky Kusumah, Desty Rahmawati LINDAWATI M. Sri Rezeki, Pamella M.Miskun Arrihussalam Maelani, Rega Mardianti, Fira Maulana, Mochamad Dilla Maulina, Wina Senja Moch. Galdiaz Nugraha Prawira Mubarok, Abil Miftahul Muhammad Ali Faishal Muhammad Ridho Muhammad Suryadindin Muhammad, Faiz Mahatir Muharam, Muhammad Faisal Mulyana, Subhan Munawar, Arby Muhyi Muthia Mutmainah Aprinelia Nazid, Sa’dan Frima M Nazwa Tiara Herdiani Nenti Fajriyanti, Neng Nisa, Salma Aulia Nugraha, Mochammad Suva Nugraha, Yogi Nurahman, Zamzam Nuralim, Taslim Nurcinta Asih Nurdin, Almiansyah Nurfauziah, Hanifah Nurhakim, Rizal Nurlatifah, Sarah Nursalim, Fathir Miftah Prananta, Azfa Pratama, Aditya Ramdhani Prayogi, Depi Purnama, Alpin Putri, Icha Aulia Rahayu, Puspa Arum Rahma Rohimah Hinaffisah Ramadhan, M. Zilhan Salman Ramadhan, Muhamad Alfito Dwi Ramdani, Junaedi Ramdhani, Tio Rian Hidayatullah Rinjani, Nabila Putri Rismansyah, Tendi Rizal, Muhamad Saepul Rizki Anugrah Munawar Rizky, Muhammad Naufal Rohimat Rohman, Asep Abdul Rosidin, Ahmad Ruspa, Rena Ryan Ardiansyah Saepul Rohman, Taupik Sandi Dzulfikar Sanusi, Muhamad Anwar Saputra, M. Sandi Kurniawan Sastradipraja, R Muhammad Arya Fajar Saumi, Ira Nurachma Shaffan, Yusri Fisabili Sifa Nur Maisah Siti Rohmah Suhendi Sukma, Ersa Hermalia Sulastri, Dewi Sulton, Restu Suparman, Tegar Radiansyah Syafe'i, Abdullah Syifa, Syifa Khoirunnisa Yogaswara, Dendi Yulianti, Jihan Yuningsih, Siti Yuni Zaman, Muhammad Badru