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All Journal Jurnal Mahasiswa Jurusan Teknik Pengairan Jurnal Teknik Pengairan: Journal of Water Resources Engineering Jurnal Wilayah dan Lingkungan JCES (Journal of Character Education Society) Civil and Environmental Science Journal (CIVENSE)
Pitojo Tri Juwono
Jurusan Teknik Pengairan, Fakultas Teknik, Universitas Brawijaya
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Education Engineering Environmental Science

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Analisis Prediksi Debit Sungai Amprong Dengan Model Arima (Autoregressive Integrated Moving Average) Sebagai Dasar Penyusunan Pola Tata Tanam Rahayu, Wiwin Sri; Juwono, Pitojo Tri; Soetopo, Widandi
Jurnal Teknik Pengairan: Journal of Water Resources Engineering Vol 10, No 2 (2019)
Publisher : Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.pengairan.2019.010.02.04

Abstract

An accurate determination of water availability in the 10-day period of the Amprong River has an important role in the planting system to support the agricultural production process in DI. Kedungkandang, because if the availability of water is not precisely determined, there will be an error in regulating irrigation water and its use is not as expected. To overcome these problems, an analysis system is needed that is able to make predictions well. One of the time series models is the ARIMA (Autoregressive Intregated Moving Average) model. The model was built by 9 period discharge data, namely 2008/2009 until 2016/2017, to predict the discharge of period 2017/2018. Of the ten tentative models obtained, there are only five models that are worth using. The best model is the ARIMA model (2,0,1) (1,2,1) 36 with the value of MSE = 22,90; KR = 6.00; MSD = 8.05; MAD = 2.04; MAPE = 18.53 and MPE = -8.98. In second crop season the crop intensity of paddy increased from 55.79% to 64.50%, and the production of GBK increased by 13.50%. While the third crop season paddy crop intensity increased from 37.22% to 49.99%, and GBK production increased by 25.54%.
STUDI POTENSI PEMBANGKIT LISTRIK TENAGA MINI HIDRO (PLTM) DESA KEPIL, KABUPATEN WONOSOBO, JAWA TENGAH Anggraini, Fauziah Rahmawanti; Juwono, Pitojo Tri; Suhartanto, Ery
Jurnal Mahasiswa Jurusan Teknik Pengairan Vol 1, No 2 (2018)
Publisher : Jurusan Teknik Pengairan, Fakultas Teknik, Universitas Brawijaya

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Abstract

ABSTRAK: NegaraaIndonesiaamempunyai potensi pembangkit listrik tenaga air (PLTA) sebesar 70.000 mega watt (MW). Potensi ini baru dimanfaatkanasekitar 6apersen atau 3.529 MW atau 14,2 % dariajumlah energi pembangkitan PT PLN. Untuk dapat mengoptimalkan potensi tersebut perlu dilakukan studi potensi, salah satunya di Desa Kepil, Kabupaten Wonosobo, Jawa Tengah. Agar dapat dimanfaatkanaperlu diadakan kajian terkait perencanaan Pembangkit Listrik Tenaga Mini Hidro (PLTM). Berdasarkan hasil kajian didapatkan debit andalan sebesar 1,377 m3/detik. Tinggi jatuh efektif rata-rata yang digunakan untuk membangkitkan PLTM sebesar 24,08 meter. PLTM ini dibangunadengan komponen sipil yang meliputi bangunan pengambilan, bak pengendap, saluran pembawa, bak penenang, pipa pesat, rumah pembangkit, dan saluran pembuang. Turbin yang digunakan di daerah studi adalah jenis Francis. Besarnya rata- rata daya yang dapat dihasilkan sebesar 222,49 kW dan energi yang dihasilkan sebesar 1.942.040,87 kWh atau sebesar 1,943 GWh. Banyaknya rumah yang dapat terlayani dengan kapasitas terpasang setiap rumah sebesar 450 watt adalah sebanyak 494 rumah. Kata Kunci: PLTM, Turbin, Energi, Listrik, Debit.   ABSTRACT: Indonesian country has a potential hydroelectric power plant of 70,000 mega watts (MW). This potential was only used by about 6 percent, or 3,529 MW, or 14.2% of the total energy generation PT PLN. In order to optimize the potential need to do a study of potential, one of them in the Kepil village , Wonosobo, Central Java. So can be used there should be a study related to planning of Mini Hydro Power Plant (PLTM). Based on the study results obtained mainstay discharge of 1,377 m3/sec. High effective fall that was used to generate micro power plants amounted to 24,08 meters. This micro power plants were built with a civilian component that includes intake, sand trap, headrace, forebay, penstock, power house, and tailrace. Turbine used in the study area is kind of Francis. The amount of the average power that could be generated at 222.49 kW and the energy produced amounted to 1,942,040.87 kWh or a total 1,943 GWh. Keywords: Hydropower,Turbine, Energy, Electric, Discharg.
Pengaruh Perbedaan Rerata Data Debit pada Pemodelan Hidrologi Deret Berkala untuk Peramalan Debit Sungai dengan Metode Arfima Juwono, Pitojo Tri
Jurnal Teknik Pengairan: Journal of Water Resources Engineering Vol 1, No 2 (2010)
Publisher : Fakultas Teknik, Universitas Brawijaya

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Abstract

Debit sungai merupakan salah satu parameter hidrologi yang sangat penting dalam bidang Teknik Sipil. Mengingat pentingnya data debit sungai dan peramalannya dimasa mendatang, menyebabkan meningkatnya kebutuhan pemodelan hidrologi timeseries yang mampu menirukan dan meramalkan perilaku dari suatu rangkaian data debithistoris dari suatu sungai. Perbedaan rerata data debit dalam membangun model hidrologi deret berkala diduga akan mempengaruhi kinerja model hidrologi tersebut untuk peramalan debit sungai pada waktu mendatang.Pembangunan model hidrologi deret berkala untuk peramalan debit sungai dalam penelitian ini dilakukan dengan berbasis pendekatan statistik metode ARFIMA. Lokasi penelitian dilakukan pada dua sungai besar yang terpilih di Jawa Timur, yaitu Sungai Brantas dan Sungai Bengawan Solo. Pada masing-masing sungai tersebut dilakukan penelitian untuk data debit di tiga sampel lokasi AWLR dengan panjang datadebit pengamatan selama tujuh tahun.Berdasarkan hasil analisa dalam penelitian ini memperlihatkan bahwa model hidrologi deret berkala dengan metode ARFIMA secara umum cukup mampu menirukan data debit historis dan mampu meramalkan debit di Sungai Brantas dan Sungai Bengawan Solo untuk satu tahun periode data ke depan, sehingga hal ini berguna untukberbagai keperluan perencanaan dan pengelolaan debit di waktu mendatang.Hal tersebut ditunjang lebih detail dari hasil analisa variasi rerata data debit menunjukkan bahwa model hidrologi time series dengan data debit 15 harian menghasilkan model hidrologi time series dengan rata-rata kriteria statistik in sample MSE dan AIC serta out sample MSE dan MAD yang relatif lebih baik dibandingkan dengan model hidrologi untuk data debit 10 harian dan data debit bulanan. Untuk data debit dengan rerata 15 harian di Sungai Brantas menghasilkan rata-rata kriteria pemilihan model dengan MSE dan AIC sebesar 0,046 dan -494,883 serta untuk peramalan debit sungai satu tahun berikutnya diperoleh MSE dan MAD 0,141 dan 0,174. Sedangkan pada Sungai Bengawan Solo menghasilkan rata-rata kriteria pemilihan model dengan MSE dan AIC 0,104 dan -532,096 serta untuk peramalan debit sungai satu tahun berikutnya diperoleh MSE dan MAD 0,837 dan 0,377.Kata kunci : Pemodelan Hidrologi Deret Berkala, Peramalan Debit, Rerata Debit
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
KAJIAN ALOKASI ANGGARAN BIAYA JARINGAN IRIGASI BERBASIS KINERJA IRIGASI DAN NILAI MANFAAT EKONOMI (STUDI KASUS D.I. PRAMBATAN KOTA BATU) Kesuma, Alex Wahyu; Trijuwono, Pitojo; Sayekti, Rini Wahyu
Jurnal Teknik Pengairan: Journal of Water Resources Engineering Vol 3, No 1 (2012)
Publisher : Fakultas Teknik, Universitas Brawijaya

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Abstract

There are many factors that determined budget allocation in irrigation network: technical factor, policy, political factor, and local economic capacity to fund an activity.Budget allocation design is conducted by consider priority index factor and budget allocation index based on Budget (RAB) nominal value, irrigation network performance, economic benefit of agricultural activities, and land area of the irrigation network. With Analysis of priority index = 0,05(IRAB) + 0,8(1/IKSI) + 0,1(IME) + 0,05(ILBS), resulted that maintenance activities of JI Prambatan Kanan is the first priority with priority index value 1,334, and JI Prambatan Kiri is second priority with priority index value 1,315. Nominal value of the budget and budgetary plafond for annually costs of irrigation network is considered in the process of allocating budget to the maintenance activities.Keywords: Use value, irrigation, performance
Kajian Ekonomi Penanganan Sedimen Pada Waduk Seri Di Sungai Brantas (Sengguruh, Sutami Dan Wlingi) Djajasinga, Viari; Masrevaniah, Aniek; Juwono, Pitojo Tri
Jurnal Teknik Pengairan: Journal of Water Resources Engineering Vol 3, No 2 (2012)
Publisher : Fakultas Teknik, Universitas Brawijaya

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Abstract

Sengguruh, Sutami and Wlingi, were series of three reservoirs in the upper Brantas River which have a high rate of sedimentation, thus research should be carried out to determine the proper method of sediment handling which could maintain the benefit function of reservoirs as well as feasible from economic perspective.Processing data and data analysis was performed to determine the condition of reservoir capacity, sedimentation rate, the amount of sediment handling and most feasible alternatives on sediment handling. The analyzes carried out in two phases, first phases to the existing condition and the second phases to four (4) alternatives of sediment handling at ten years project work. Alternative 1 is sediment handling with a volume of 1 million cum/year, while Alternative 2, Alternative 3, and Alternative 4 is sediment handling with volume equals to annual sedimentation rate with variation on different work method. The average sedimentation rate in those reservoirs on the last 20 years reaching a massive 1.7 million cum/ year. Hence, routine sediment handling with dredging and flushing work should to be done with minimal volume at 1.7 million cum/year. The result of economic analysis show that alternative 3 with B/C = 1.03, IRR = 17.35% and NPV = Rp. 6.37 Billion in the alternative with volume of sediment handled equals to sedimentation rate and feasible from economic perspective.Keywords: reservoir sedimentation, sediment handling, economic benefit.
Kajian Peningkatan Manfaat Pada Bendungan Tugu Kabupaten Trenggalek Wahyuningdyah, Mey; Juwono, Pitojo Tri; Rispiningtati, Rispiningtati
Jurnal Teknik Pengairan: Journal of Water Resources Engineering Vol 3, No 2 (2012)
Publisher : Fakultas Teknik, Universitas Brawijaya

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Abstract

At the beginning Tugu dam was planned to supply water demand and irrigation water. In this study will be reviewed on a large electric power can be generated from the utilization of the reservoir outflow discharge and increase the value of benefits when Tugu dam is used as power plant and tourism places.Power generation at Tugu dam is planned in base load. Francis turbine is selected with optimum installed power is 400 kW, which capability of producing energy is 2,140,382.328 kWh / year. Tugu dam tourism region plans to use the land area of 9.86 hectares with cottage, water and tourist playground, swimming pool, restaurant and shop / shopping tour. Based on economic analysis conducted, can increase in the value of BCR, NPV and IRR. BCR value of 1.115 which was originally changed to 1.142; the original NPV of Rp. 36,705,066,329.00 turned into Rp.53.154.809.819,00; the original IRR 13.057% turn into 13.408%.Key words: power generation, tourism, economic analysis.
Kajian Peningkatan Kapasitas PLTA Lodoyo Widyaningsih, Wiwik; Rispiningtati, Rispiningtati; Juwono, Pitojo Tri
Jurnal Teknik Pengairan: Journal of Water Resources Engineering Vol 3, No 2 (2012)
Publisher : Fakultas Teknik, Universitas Brawijaya

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Abstract

Lodoyo dam has the potential to development of energy resources especially hydro energy power plant (HEPP), where the excess outflow discharge through spillway still have potential for capacity improvement.With the availability of outflow discharge through spillway data, the additional potential energy can be calculated, by analyze of head effective and energy. Also can performed in economic feasibility with parameter B/C Ratio, IRR, and NPV where benefit value calculated from the selling price of electric generated. The optimum improvement based on four alternative discharge outflow design with two alternative alignment. From 1st alternative analysis where located on the left river, the largest value of B/C Ratio at 1.037 (at the rate 12%) on discharge outflow at 34.05 m3/sec (Q75%) with an installed capacity 3.20 MW, and an annual energy at 25.58 GWh. For 2nd alternative where located on the right side of river has largest B/C Ratio values at 1.076 on the same discharge outflow with an annual energy of 25,65 GWh so this alternative has the most optimal of potential energy.Key words: discharge, head, energy, economic feasibility.
Kajian Potensi Sungai Srinjing Untuk Pembangkit Listrik Tenaga Mikrohidro (Pltmh) Brumbung Di Kabupaten Kediri Indarto, Agus; Juwono, Pitojo Tri; Rispiningtati, Rispiningtati
Jurnal Teknik Pengairan: Journal of Water Resources Engineering Vol 3, No 2 (2012)
Publisher : Fakultas Teknik, Universitas Brawijaya

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Abstract

MHP Brumbung is located at upstream of Srinjing River. Potential discharge MHP Brumbung depends on the discharge of the gate 1 operation of Siman dam which is used to irrigate 4852 Ha Siman crop area.To obtain the optimal scale in the construction of the MHP to be optimized flow generation and generating units in order to obtain an economical MHP. Dependable discharge optimization results are used as a basic for discharge planning of Brumbung MHP is discharge with 75% probability that is equal to 3.394 m3/dt with the discharge for one unitinstalled capacity is equal to 1.697 m3/dt and installed capacity of 50 kW,with fluctuating effective head ranged from 4.944 m to 5.140 m, the annual energy production obtained 875,785.980 kWH for two generating units with a turbines Crossflow.Keywords: Micro hydropower, discharge optimization, installed capacity
Analisa Kinerja Sistem Distribusi Air Bersih Pada PDAM Di Kota Ternate Ardiansyah, Ardiansyah; Juwono, Pitojo Tri; Ismoyo, M. Janu
Jurnal Teknik Pengairan: Journal of Water Resources Engineering Vol 3, No 2 (2012)
Publisher : Fakultas Teknik, Universitas Brawijaya

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Abstract

Fresh water providing system at Keluarahan Jati and Kelurahan Tanah Tinggi Barat in Sub- District of South Ternate City is not able to run smoothly yet, it may be caused by not maximum water supply during 24 hours and not maximum to take debit from the main spring.This research is aimed to know network ability including debit, pressure, continuity waters and to analyze customer satisfaction level for service system of fresh water distribution network at PDAM of Ternate City. Total of fresh water need is 1459.50 liter/day, as total of sufficient fresh water need. The water losing percentage is 20%, water losing level in 2012 is 0.002 liter/second. Result of running by Epanet 2.0 program on 07.00 was obtained unfit pressure with criteria planning (10-60 mH20) is as 70.97 m, the speed is more than standard planning (0.6-2.5 m/second), that is 0.01-0.09 (m/second). The little debit at node 4, node 11, are 0.71 m3/second. Questionnaire result is 53.61% stated not satisfaction and 26.80% stated very unsatisfied.Keywords: Debit, quality, quantity, continuity, pressure.
Co-Authors Agus Indarto Ahmadi, Yudha Tantra Alex Wahyu Kesuma alfredo, moch Andawayanti, Ussy Andre Primantyo Hendrawan Anggara Cahyo Wibowo Anggraini, Fauziah Rahmawanti Aniek Masrevaniah Asmaranto, Runi Asmaranto, Runi Atikah, Dewi Ayu Pratama Putri, Ayu Pratama Azmi, Muhammad Nur AZWAR, HAFIDH BURHAN Bambang Pramujo, Bambang Bayu Wicaksono Cahya, Evi Nur cristina Dwi, cristina Damarnegara, A. A. N Satria Danang, Kiswanto - Dediek Isqak Dian Dinanti Dian Sisinggih Dwi Priyantoro Eko Suryo Pranoto Ellanda, Riska Karunia Emma Yuliani Eric Virgiawan Aryadi Fauzia Sonia, Fauzia Ghafara, Abdan Izzan Gunawan Prayitno Hari Siswoyo Harimurti Harimurti Heri Suprijanto Holyness Nurdin Singadimedja Irene Dhian Andriawati, Irene Dhian Iskandar Iskandar Jalaludin, Muhammad Satia Kaharuddin Kaharuddin Lily Montarcih Limantara Linda Prasetyorini Lisyahadah, Annida M. Janu Ismoyo Maskur Efendi, Maskur Mayang Wigayatri Mey Wahyuningdyah mikail Adhi, mikail Moch. Sholichin, Moch. Mohammad Bisri Mohammad Taufiq Mohammad Taufiq Muhammad Ruslin Anwar Murdhianti, Ari Murdhianti, Ari Nadjadji Anwar Nindya Sari Nisa Andan Restuti, Nisa Andan oktanti, vita Pradany, Ahmad Dwiki Pratama, Muhammad Rizky Pratiwi, Tami Prima Hadi Wicaksono Purwanto, Pradoko Indra Putra, Galih Rizam Pratama Putri, Laily Amalia Rachmanda, Valdi Cahya Rahayu, Wiwin Sri Rahmah Dara Lufira Ramadhan, Yudhistira Akbar Zulfikar Rini Wahyu Sayekti Rispiningtati Rispiningtati Riwin Andono Rizka Aditya Rachman Runi Asmaranto Sandy, Dina Yunita Saputro, Robert Agung Sasongko, Yufintra Prasetya Sisno, Suhardjono Suhardjono Suhardjono Suhartanto, Ery Suprijanto, Heri Suprijanto, Heri - Suwanto Marsudi Very Dermawan Viari Djajasinga Wahyu Prasetyo Wahyu Sejati, Wahyu Wahyudi, Aqsha Prahitna Wicaksono, Prima Hadi Widandi Soetopo Wijayanto, Achsin Win Haliem Winarta, Bambang Wiwik Widyaningsih