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Jurusan Teknik Pengairan Fakultas Teknik Universitas Brawijaya
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PENANGGULANGAN BANJIR DENGAN PEMBUATAN TANGGUL SHEET PILE PADA SUNGAI BUNGI KABUPATEN PINRANG PROVINSI SULAWESI SELATAN Tandisau, Deandy Gilang; Dermawan, Very
Jurnal Mahasiswa Jurusan Teknik Pengairan Vol 2, No 1 (2018)
Publisher : Jurusan Teknik Pengairan, Fakultas Teknik, Universitas Brawijaya

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Abstract

ABSTRAK: Sungai Bungi merupakan salah satu sungai yang berada Kabupaten Pinrang, Provinsi Sulawesi Selatan dengan luas 1961,77 km2. Sungai Bungi yang letaknya cukup strategis berada di jalan lintas trans Sulawesi secara langsung dan tidak langsung memberikan dampak terhadap daerah disekitarnya. Sungai Bungi merupakan pertemuan dari Sungai Kalobe, Sungai Kamali, dan Sungai Rantoni yang meyebebakan banjir setiap tahunnya. Banjir yang terjadi disebabkan karena ketinggian dataran banjir berada dibawah elevasi muka banjir serta gerusan dan longsoran tebing yang pada akhirnya menjadi endapan. Upaya penanggulangan banjir direncanakan dengan menggunakan tanggul Sheet pile. Analisa profil aliran dilakukan dengan menggunakan software HEC-RAS dengan titik cross setion sebanyak 50 ruas dan jarak tiap cross section 50 m. Sedangkan untuk  menganalisa stabilitas Sheet pile digunakan Metode Rankine. Perencanaan Penanggulangan banjir Sungai Bungi menggunakan debit banjir rancangan Q25th yaitu sebesar 392.498 m3/det. Pada kondisi eksisting ditemukan beberapa lokasi yang meluber. Hasil perencanaan bangunan Sheet Pile didapatkan  dengan kedalaman total 18 m sampai pada tanah keras. untuk penangggulangan banjir  dengan Sheet Pile di Sungai Bungi berada pada 2 titik, masing-masing titik 250 m pada muara dan 300 m berada di ruas tengah sungai. Kata Kunci: Sungai Bungi, Penanggulangan Banjir, Hec Ras, sheet Pile 
Uji Model Fisik Hidraulik Terjunan Tegak dengan Kisi Peredam (Longitudinal Racks) untuk Pengendalian Loncatan Hidraulik Wicaksono, Prima Hadi; Dermawan, Very
Jurnal Teknik Pengairan: Journal of Water Resources Engineering Vol 1, No 2 (2010)
Publisher : Fakultas Teknik, Universitas Brawijaya

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Abstract

Air luapan pada terjunan tegak akan terbentuk loncatan hidraulik di hilir. Loncatan hidraulik ini terjadi apabila terjadi perubahan kedalaman yang mendadak terhadap kedalaman lanjutannya. Salah satu perilaku loncatan hidraulik yang penting adalah letak dan panjang loncatan hidraulik. Mengingat kemungkinan besarnya biaya pembuatan kolam olakan khususnya pada kasus bangunan terjunan tegak, maka salah satu cara penyelesaian adalah dengan memperbesar peredam energi yang terjadi, diantaranya yaitu dengan membuat terjunan tegak berkisi (terjunan peredam energi).Tujuan kajian ini adalah untuk mempelajari perilaku hidraulika pada bangunan terjunan tegak dengan kondisi tanpa kisi dan terjunan tegak berkisi, meliputi: kondisi aliran di hulu dan hilir, panjang dan tinggi loncatan hidraulik, dan efektifitas peredaman energi yang tejadi pada bangunan terjunan tegak berkisi. Adapun manfaatnya dapat memberikan informasi tentang unjuk kerja bangunan terjunan tegak berkisi sehingga dapat digunakan sebagai bahan pertimbangan dalam proses desain bangunan terjunan tegak dan kolam olakannya.Pengujian perilaku hidraulika aliran di bangunan terjunan tegak berkisi yang dilakukan:(1) Model seri 0, model original design, terjunan tegak tanpa kisi, (2) Model seri 1, 2, dan 3,alternative design, yaitu terjunan tegak berkisi. Pada model ini akan didapatkan perilaku hidraulika aliran pada bangunan yang diujicobakan. Pengamatan dan pengukuran dilakukan pada titik-titik yang ditentukan, sebagai berikut: (1) Pengukuran kedalaman air pada hulu danhilir terjunan tegak, (2) Mengamati kondisi tinggi dan panjang loncatan yang terjadi, (3) Pengukuran kecepatan aliran pada hulu dan hilir terjunan tegak.Hasil penelitian menunjukkan bahwa: (1) Penempatan kisi peredam di ujung terjunan bisa mempengaruhi nilai yc/y1, yaitu nilai yc/y1 menjadi semakin kecil, (2) Penempatan kisi peredam di ujung terjunan bisa mempengaruhi nilai y2/y1, yaitu nilai y2/y1 menjadi semakin kecil, (3) Penempatan kisi peredam di ujung terjunan bisa mempengaruhi nilai Fr1, yaitu bisa menurunkan nilai Fr1 yang terjadi, (4) Penempatan kisi peredam di ujung terjunan bisa mempengaruhi nilai Ld/y1 , yaitu bisa menurunkan nilai Ld/y1 yang terjadi.Kata kunci: terjunan tegak, terjunan berkisi, loncatan hidraulik
PEMODELAN NUMERIK PELIMPAH SAMPING WADUK TELAGAWAJA BALI KABUPATEN KARANGASEM DENGAN ANALISA KOMPUTASI FLUIDA DINAMIS Wibowo, Anggara Cahyo; Dermawan, Very; Juwono, Pitojo Tri
Jurnal Teknik Pengairan: Journal of Water Resources Engineering Vol 7, No 2 (2016)
Publisher : Fakultas Teknik, Universitas Brawijaya

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Abstract

ABSTRAK Pembangunan bendungan Telagawaja merupakan suatu alternatif untuk mengatasi masalah pemenuhan kebutuhan air, baik domestik maupun non domestik sebagai suatu upaya konservasi sumber daya air. Bendungan terdiri dari bangunan pelimpah, saluran peluncur dan kolam olak. Tujuannya adalah memberikan gambaran tentang pola hidrolika pada pelimpah samping (side channel spillway) yang terjadi pada model test. Dasar dari hasil kalibrasi CFD (Computational Fluid Dynamic) adalah data hasil pengukuran model test. Hasil kalibrasi yang didapat untuk parameter kecepatan memenuhi kriteria yaitu kesalahan relatifnya dibawah 10%. Namun ada beberapa section yang tidak memenuhi standar KR, yaitu hasil parameter tekanan serta parameter tinggi muka air. Diharapkan dengan adanya penelitian ini, hasil pemodelan hidraulika bisa menjadi lebih berkembang dalam penentuan sebuah alternatif desain spillway dan mempermudah dalam proses perencanaannya. Kata Kunci: CFD, Skala Model, Model Fisik, Hidrolika, Pelimpah ABSTRACT Construction of Telagawaja dams is an alternative to resolve the problem of fulfillment the water needs for both domestic and non-domestic in the area as the conservation of water resources. Dams consist of spillway, chute, and stilling basin. The aim of this study is to describe a detail of the hydraulics patterns of side channel spillway in model tests. Basic criteria of CFD (Computational Fluid Dynamic) calibrations is measurement data from model test. The calibration results for velocity parameter of relative error less than 10%. However, there are several sections that cannot be accepted by the standards relative error, such as the result of pressure parameters and the parameters of the water level. Expected the results of the hydraulics modeling could be more improved in the determination of an alternative spillway design and simplify the planning process. Keywords: CFD, Scale Modelling, Physical Model, hydraulics, Spillway
Studi Pengendalian Banjir Sungai Remu Kota Sorong Provinsi Papua Barat Pramana, Yanuar Hendra; Harisuseno, Donny; Dermawan, Very
Jurnal Teknik Pengairan: Journal of Water Resources Engineering Vol 5, No 2 (2014)
Publisher : Fakultas Teknik, Universitas Brawijaya

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Abstract

Sorong City where is located in West Papua Province has often experiences flooding due to overflow of Remu River. This study aims to find the proper flood management alternatives through hydrology, hydraulic, and economy approach. Based on hydrology analysis with Log Pearson III method, the highest historical rainfall that ever occured is the rainfall with return period of 16 years, that is 224.2 mm. The HEC RAS 4.1. simulation results n value of 0.021 with relative error of 2.64%. The proper flood managements are dike and retarding basin and the both of the alternatives use return period of 25 years. Dike has been choosen as then proper alternative with total ranking of 0.53 based on priority scale determination using Analyrical Hierarchy Process method with technique, economy, and easy implementation considerations.Keywords: Flood, HEC RAS, Analytical Hierarchy Process, Dike, Retarding Barsin.
Analisis Efektivitas Penambahan Kapasitas Pintu Air Manggarai Untuk Pengendalian Banjir Di Wilayah Sungai Ciliwung Anggraini, Nimas Ayu; Dermawan, Very; Purwati, Endang
Jurnal Teknik Pengairan: Journal of Water Resources Engineering Vol 6, No 1 (2015)
Publisher : Fakultas Teknik, Universitas Brawijaya

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Abstract

DKI Jakarta Province consists of 5 cities and 1 district. At the north part of Jakarta there are beaches which became the estuary of 13 rivers and 2 canals. Ciliwung is the main river that has an effect on the lives of people in Jakarta. The Ciliwung river flows towards to BKB. Manggarai sluice gate is located at the upstream of BKB to control Ciliwung river flow. This study was conducted by giving two addition of Manggarai sluice gate, each dimension of additional gate is 3.4 m x 8.1 m and 5 m x 5.3 m. Discharge calculations for hydrology analysis used Log Pearson III while hydraulics analysis used software HECRAS 4.1.0. Discharge data at AWLR MT Haryono control point recorded on January 21st,2013 showed 287.876 m 3 /sec. From the data, sluice gate simulations conducted with 8 alternatives opening gates. In this study showed the most effective results for Q2th and Q5th with opening gates 2 m (alternative 4), Q10th with opening gates 4 m (alternative 5), Q20th and Q25th with opening gates 6 m (alternative 6), Q50 and Q100th with maximum gates opening (alternative 8).Keywords: Sluice Gate, Simulation, Gate Operation, Opening Gate
Kajian Sistem Manajemen Pengelolaan Daerah Aliran Sungai Dalam Upaya Pelestarian Sumber Daya Air (Studi Kasus: Das Bone Provinsi Gorontalo) Polie, Reynaldo Jeffry; Rispiningtati, Rispiningtati; Dermawan, Very
Jurnal Teknik Pengairan: Journal of Water Resources Engineering Vol 5, No 2 (2014)
Publisher : Fakultas Teknik, Universitas Brawijaya

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Abstract

The potential of water resources Bone is the source of life for the people of Gorontalo, especially as a source of water, supply fresh water for the people of Bone Bolango. Generally in upstream of watershed use less water than the water right of it downstream, and the areas generally utilize water higher than the water use right. Excess use of water in downdstream will take from the remaining water rights of upstream. Because of these problems, it is necessary to study type of management system in related with conditions of watershed. System of incentives / disincentives is a form of integrated watershed management. The purpose of this study are to investigate the discharge quantity is used by the stakeholders, determine the required operational discharge in conservation the watershed, and establish the policy in watershed management with a system of incentives / disincentives.Keywords: Water Right, Incentives, Disincentives
Rasionalisasi Jaringan Penakar Hujan Di Das Kedungsoko Kabupaten Nganjuk Rodhita, Muhamad; Limantara, Lily Montarcih; Dermawan, Very
Jurnal Teknik Pengairan: Journal of Water Resources Engineering Vol 3, No 2 (2012)
Publisher : Fakultas Teknik, Universitas Brawijaya

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Abstract

Kedungsoko River and its tributaries is located in Kediri and Nganjuk district. Kedungsoko river has approximate 416,54 km2 of watershed area number. Kedungsoko catchment area is affected by approximate 8 rain stations. There has not been studied theoretically about the optimum density and dispersal patterns of rainfall station networks that have been installed in the Kedungsoko watershed.Based on the results of assessment and analysis using Kagan-Rodda method, it was acquired 4 selected stations, while Kriging method obtained results of 8 selected stations that spreaded in Kedungsoko watershed. Relative error for design rainfall of Kagan-Rodda method is 1,906% and Kriging method is 2,802%. Relative error of hidrograf discharge unit for Kagan-Rodda is 38,53% and 19,83% for Kriging.Keywords: Rainfall station networks, Kagan-Rodda, Kriging
Kajian Penanganan Sedimentasi Sungai Banjir Kanal Barat Kota Semarang (Study of Sedimentation Mitigation West Floodway Semarang City) Prasetyo, Dani; Dermawan, Very; H., Andre Primantyo
Jurnal Teknik Pengairan: Journal of Water Resources Engineering Vol 6, No 1 (2015)
Publisher : Fakultas Teknik, Universitas Brawijaya

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Abstract

For the flood control of Semarang City,one of part needed is sedimentation mitigation atthe West Floodway river. This study is carried out to predictdistribution patterns and sediment volumein the West Floodway. The simulation of existing conditions is the first step for determination of sediment transport model. The models will be used to predicting sedimentation until year 2019 and 2024 on the condition without and with sediment mitigation alternatives. Based on the existing condition simulation, the average of elevation increase in 2019 and 2024 respectively are 1,864 m and 2,210 m. The estimation of sediment volume in 2019 and 2024 respectively are 1.053.524 m³ and 1.223.693 m³. The results of sediment transport prediction with sediment pocket showing the lowest average elevation in 2019 and 2024 respectively are 1,379 m and 1,992 m.The smallest volume of sediment obtained by dredging with dredger in 2019 and 2024 respectively are 791.161 m³ and 1.099.685 m³. Based on cost estimation,the cost of dredging with dredger is the lowest, at a cost 32.267.637.478 IDR.Keyword: sedimentation, HEC-RAS, prediction, elevation, volume, cost
EVALUASI FUNGSI BANGUNAN PENGENDALI BANJIR SUNGAI BARABAI KABUPATEN HULU SUNGAI TENGAH PROVINSI KALIMANTAN SELATAN Anam, Syaiful; Dermawan, Very; Sisingih, Dian
Jurnal Teknik Pengairan: Journal of Water Resources Engineering Vol 6, No 2 (2015)
Publisher : Fakultas Teknik, Universitas Brawijaya

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Abstract

Abstrak: Bangunan pengendali banjir Sungai Barabai berupa Bangunan Intake dan Saluran Banjir Barabai sudah tidak dapat dirasakan lagi dampaknya terhadap Kota Barabai, sehingga diperlukan evaluasi dari fungsi bangunan pengendali banjir. Kapasitas eksisting Saluran Banjir Barabai adalah ±15 m3/detik dengan Qrencana awal yaitu 40 m3/detik. Elevasi muka air banjir pada saat Q1 belum dapat masuk ke dalam Bangunan Intake dan rusaknya peninggi muka air (groundsill). Rehabilitasi bangunan pengendalian banjir bisa dilakukan dengan normalisasi Saluran Banjir Barabai dan menurunkan elevasi lantai Bangunan Intake pada +24.00. Rehabilitasi bangunan pengendali banjir ini hanya mampu mengatasi banjir hingga Q5 dengan pengurangan genangan banjir sebesar 62.75%. Penanganan banjir sampai dengan Q50 memerlukan normalisasi Sungai Barabai di bagian hilir bangunan intake (menuju Kota Barabai sampai dengan Kota Barabai) dengan dimensi lebar bawah 20 m, lebar atas 36 m, dan kemiringan talud 1:1.Kata kunci: Bangunan Intake, Saluran Banjir, Pengendalian Banjir, Sungai Barabai Abstract: Barabai river’s flood control structures such as Intake Building and Flood channel can no longer be perceived its impact on Barabai City, so that evaluation of the function of flood control structures is necessary. Barabai flood channel capacity is ± 15 m3/second less than the initial capacity planning 40 m3/second. Flood water levels during Q1 have not been able to get into the Intake Building and the damage  of  groundsill. Rehabilitation of Barabai river’s flood control structures can be done with normalization of Barabai’s Flood Channel and floor’s derivation of  Intake Building at +24.00. This flood control structures rehabilitation can only cope with flood up to Q5 with reduction puddles 62.75%. Flood handle up to Q50 needs normalization of  Barabai River at downstream of Intake Building with trapezoidal with dimension of 20 m base width and 36 m top width, and talud slope 1:1.Keywords: Intake Building, Flood Channel, Flood Control, Barabai River
Studi Pengendalian Banjir Kali Wrati Kabupaten Pasuruan K., Rizal Arifuddin; Harisuseno, Donny; Dermawan, Very
Jurnal Teknik Pengairan: Journal of Water Resources Engineering Vol 5, No 1 (2014)
Publisher : Fakultas Teknik, Universitas Brawijaya

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Abstract

Wrati River is a collector of Sangar River, Nyangkring River, Pagak River, and Bangiltak River, that located in Beji Sub Regency, Pasuruan Regency, East Java Province. Inundation in settlement and agricultural areas that caused by flood from Wrati River is a problem that occurs every rainy season. This study aims to determine the return period of flood and the alternative of flood control system. Result of the study shows that the amount of Wrati River’s flood is 17,294 m /s equal to return period 25-year flood discharge. The first alternative of flood control system by using Hydrologic Engineering Centers River Analysis System 4.1 (HEC-RAS 4.1) are river normalization and dyke construction that is combined with interconnection between Wrati River and Bangiltak River. Interconnection are connected by two side weirs in Stations 125 and Stations 165 with 5-m-wide and 9-m-wide, which discharge capacity are 14 m 3 /s and 30 m /s. The second alternative of flood control system is constructing two retarding basins. Capacity of the retarding basins are 1.603.425,65 m 3 3 and 3.201.424,83 m 3 .Keyword: flood control, river, interconnection, retarding basin, HEC-RAS
Co-Authors Abdul Azis Hoesein Achmad Marzuqi, Achmad Adihaningrum, Anita Andriyani Adilah, Ahmad Daffa Aditiya, Achmad Rizkiawan Aji, Yahya Muchaimin Alam Semesta, Aji Rahmanda Alpikarigo, Jano Andre Primantyo H., Andre Primantyo Andre Primantyo Hendrawan Anggara Cahyo Wibowo Anggara Wiyono Wit Saputra, Anggara Wiyono Wit Aniek Masrevaniah Ardiyansah, Ilham Artha, Vevy May Augustiman, Yoggie Azhary Aulia, Nanda Bahreisy, Arzil Abdillah Beselly Putra, Sebrian Mirdeklis Budi, Susilo Budiarto, Fajar Dwi Danudoro, Muhammad Darmawan, Sevila Maulidina Dewi Amalia Dhitaisma, Elsya Dian Chandrasasi Dian Sisinggih Dian Sisingih, Dian Donny Harisuseno DRIANTAMA, AL GHIFARY Emma Yuliani Endah Supriyani Endang Purwati RN Eri Prawati Ery Suhartanto Evi Nur Cahya Fathinun Najib Fikhruddin, Ahmad Fitrina, Halita Hadi Kusuma, Fajar Sadewa Handoko, Shubhananda Aulia hari siswoyo Hidayah, Susi Hidayat, Muhammad Nurjati Ikhsanti, Lanthika Dwi Ilmiawan, Ahlun Nazar Indrajayatama, Ridho Satria Ivan, Hans Kurniawan Hasan, Dimas Tri Kurniawati, Oktavia Triana Kusuma, Roorkeindia Paramita Lily Montarcih Limantara Linda Prasetyorini Listyana, Kurnia Ulfi M. Amar Sajali M. Bisri M. Janu Ismoyo Martius, Alifa Fajriani mas'udi, oldvika nurma Maulana, Muhammad Adnan Mochammad Ibrahim Moh. Sholichin Mohammad Bisri Mohammad Solichin, Mohammad Muhamad Rodhita Muhammad Taufiqurrohman, Muhammad Nimas Ayu Anggraini, Nimas Ayu Nisa, Anggie Aqidahtun Nur Cahya, Evi Nurhayati, Ima Nurwijayanti Oktaviariyadi, Nabila Paksi, R. Susenatama Jatayu Pitojo Tri Juwono Prima Hadi Wicaksono Putra Ramadhani, Adhinda Dwi Putri, Aradila Tiara Rachmadani, Lucia Putri Raden Mohamad Herdian Bhakti Rahawarin, Ridho Fahreza Reynaldo Jeffry Polie, Reynaldo Jeffry Rifai, A Rifnawati, Vina Rinaldy, Alif - Rispiningtati Rispiningtati Riyanto Haribowo Rizal Arifuddin K. Rizaldi, Odhi Rosamike, Mega Okvita Karinda Runi Asmaranto Rusardi, Olda Fadhilah Aprilia Salsabila, Sekar Saputra , Anggara Wiyono Wit Sholawatini, Nur Siregar, Jeremi Ishak Siswanti, Yuvika Rega Sri Wahyuni Suhardjono, - Suhartanto, Ery Sumanto, Hari Sumiadi, Sumiadi Suwanto Marsudi Swandani, Monique Adriana Syaiful Anam Syarief Fathoni, Syarief Tandisau, Deandy Gilang Tandju, Indah Nur Alifa Tri Budi Prayogo, Tri Budi Ussy Andawayanti Utami, Diah Tri Utomo, Gloria Dihan Vareza, Ervisto Thama WAHYU FIRMANSYAH Wahyudi, Aqsha Prahitna Wayan Andi Frederich Gunawan Widandi Soetopo Wirawan Putra, Rizky Almiraldi Wiryamanta, Dhimas Raditya Yanuar Hendra Pramana, Yanuar Hendra Yudha, Nevandria Satrya Zulkanzi, Achmad Kamili