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Subuh Tugiono
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Civil Engineering, Building, Construction & Architecture

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Design Planning of Small DAM Conservation at Simple Rental Flats University of Lampung Novitasari Novitasari; Ofik Taupik Purwadi; Subuh Tugiono
Jurnal Rekayasa Sipil dan Desain Vol 7, No 2 (2019): Edisi Juni 2019
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Rain Water Harvesting is a method of water conservation by flowing rainwater into a single point of basin on the surface of the earth.  This method can be applied to areas that have a supporting topography including the educational environment.  The Lampung University area has several points of basin to hold rainwater, one of them is a water basins in the area of Simple Flats for University of Lampung can be used to do water conservation through the construction of small dam.The methods are used to redesign this small dam conservation are hydrological , small dam conservation construction planning , analysis stability of  planned constructions and the last method is estimating building construction cost.  Small dam conservation planned height of 4 m, with a base elevation at +107,00 m the dam crest elevation +110,00 m, dam crest width 2 m, the slope of 1:1,5.  The inflow debit of 0,987 m³/sec and the outflow debit of 0,586 m³/sec with cycle period 5 years. Spillway which used is free overflow type and basin specific energy building Vlugter type.  Stability small dam conservation at simple rental flats University of Lampung construction stated as safe. Reservoir volume after planned to be 29.160,750 m3, increasing from the previous volume 3.309,741 m3.  Cost estimated of design planning of conservation small dam is Rp. 7.323.901.000,00. Keywords: Small dam, Conservation, University of Lampung.
Comparative Analysis of Measured Tidal Data with Tidal Data from Forecasting (Case Study of Tanjung Priok Tidal Station) Arif Dinaryoko; Ahmad Zakaria; Subuh Tugiono
Jurnal Rekayasa Sipil dan Desain Vol 9, No 1 (2021): Edisi Maret 2021
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AbstractThis research was conducted to study the tidal characteristics. The data used in this study are the hourly tide data measured in the field and the tidal data from the BIG with data length from 1985 to 1989 at the Tanjung Priok tidal station, Jakarta Province, Indonesia. This modeling is carried out using a data length of 30 days for a data term of 720. By using the observational data and applying it in the Anfor program which uses the least squares method, produces a tidal periodic model that is obtained using 9 tidal harmonic components. From the results of modeling and measured data it can be seen the correlation coefficient. Based on these results, it can be concluded that the measured tide data components with the BIG tide data components are similar. The average correlation coefficient between the two data sets was 0.9644. From this research it can be seen that the value of the tidal data is said to be very good. Keywords: daily tides, correlation coefficient
Analisa Hidrologi dan Hidrolika Saluran Drainase Box Culvert di Jalan Antasari Bandar Lampung Menggunakan Program HEC-RAS Riyo Ardi Yansyah; Dyah Indriana Kusumastuti; Subuh Tugiono
Jurnal Rekayasa Sipil dan Desain Vol 3, No 1 (2015): Edisi Maret 2015
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This research was conducted to know the Rainfall Intensity in Antasari area using Intensity Duration Frequency curve (IDF) knowing at what time of year again when the maximum discharge channel in Antasari will be exeeted and to know drainage channels capacity in Antasari based on hydrology analysis and hydraulic using HEC-RAS.The calculations performed by using minutely rainfall data obtained from BKMG Panjang, Bandar Lampung from 2000 until 2011. After checked based on statistical parameters, using Log Pearson III methods to find rain plan based on 2 years, 5 years and 10 years return period. The results were made in IDF curve by connecting consentration time to IDF curve obtained rainfall intensity for each return period. This intensity value will be inserted into the rational formula to obtained the discharge plan value for each return period. The discharge value will be inserted to channels modelling made on HEC-RAS program. it can be obtained for what return period the discharge will be exceeded. The hydrology analysis and hydraulic performed again by using trial and error model. it can obtained the channel capacity.Based on these results, it can conclude that the rainfall intensity is 58 mm/hour for 2 years return period, 76 mm/hour for 5 years return period and 115 mm/hour for 10 years return period of time. The channels capacity exceeded for 10 years period of time and channels capacity is 1,09 m3/hour.Key words : Intensity, Rasioanal method, HEC-RAS, capacity
Analisis Pengaruh Kemiringan dan Bentuk Dasar Fishway Terhadap Rasio Perpindahan Sidat (Anguilla bicolor, sp) Maulana Yusuf; Endro Prasetyo Wahono; Dyah Indriana Kusumastuti; Subuh Tugiono
Jurnal Rekayasa Sipil dan Desain Vol 9, No 2 (2021): Edisi Juni 2021
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The construction of a transverse structure on a river such as a dam and weir needs to pay attention to environmental factors and the surrounding ecosystem, especially for the ecosystem in the river. Therefore, it is necessary to build a fishway or fish in the transverse river structure so that the river ecosystem which has migration characteristics from upstream to downstream or vice versa is not disturbed because the migration route is blocked. This is the background of the author in taking the title of the thesis Analysis of the Effect of Slope and Basic Shape of Fishway on the Eel Movement Ratio (Anguilla bicolor, sp). The results of this study indicate that eels are nocturnal or active at night. Eel activity most often occurs at a fishway angle of 30 ° by testing using a 0.5 inch pvc pipe foothold type, while the lowest activity occurs at a 35 ° fishway tilt angle by testing using a 1 inch pvc pipe foothold type. The most effective slope based on the test results is at a slope angle of 30 ° but for a slope of 50 ° it can still be said to be effective because the activity ratio shows almost double the activity. Keywords: Fishway, Footing Type, Eel Activity
Evaluasi Stabilitas Breakwater pada Kecamatan Panjang Rizqi Kurniawan; Subuh Tugiono; Endro Prasetyo Wahono; Ahmad Zakaria
Jurnal Rekayasa Sipil dan Desain Vol 9, No 4 (2021): Edisi Desember 2021
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Abstract The coast will be easily damaged due to large waves, causing damage to the area around the coastal area which is densely populated with various activities, namely Pantai Kecamatan Panjang, among others as ports, settlements, industry, trade, tourism and fishing activities. With so many activities, it should be accompanied by development that prioritizes conservation aspects to reduce the impact of environmental degradation. One of the efforts to overcome the impact of its degradation is to make a breakwater. This study aims to assess and study the failure of the protected layer unit at the breakwater on the coast of Kecamatan Panjang, so testing the stability of the protected layer using a physical model was carried out at the Hydraulics Laboratory of the University of Lampung using an experimental method. The results showed that the level of breakwater damage was 0% at 4,47 cm HHWL position with a plan wave height of 4 cm. So, the crushed rock will work well to protect the breakwater. Key words: Breakwater, Armor Units, Physical Model, Stability
Analisis Perbandingan Pola Aliran Pada Bangunan Pelimpah Ogee Dan Stepped Dengan Model Fisik 2D Robby Firza Aditya; Endro Prasetyo Wahono; Subuh Tugiono
Jurnal Rekayasa Sipil dan Desain Vol 9, No 1 (2021): Edisi Maret 2021
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A spillway building is usually a structure followed by a steep channel. Flow velocity is very dependent on the slope of the bottom channel which causes super critical flow. Besides being fast, the flow in a steep channel also has a considerable energy, so it must be able to be suppressed. The energy reduction in this study was attempted with a stepped spillway. Step weir is a modification of the standard profile for Ogee type weir. This is the background of the author in taking the title of the thesis about Comparative Analysis of Flow Patterns in Ogee and Stepped Overflow Buildings with 2-D Physical Models. The results of this study indicate that the results of the energy line height at the H3 (downstream overflow) point at the upstream height of 3 cm for Ogee are 2.68 cm, and for stepped it is 2.31 cm. There was a decrease in energy by 13.80%. This shows that the stepped spillway can absorb energy better than the Ogee type. The results of observing the flow pattern on the stepped spillway for each increase in the flow rate that overflow in the spillway can be concluded that the flow pattern that occurs is a transition flow to a skimming flow. Keywords: Energy Attenuation, Flow Pattern, Spillway, Stepped Spillway
Analisis Pemodelan Numerik Redaman Breakwater Tenggelam Tipe Berlubang dan Tidak Berlubang Menggunakan Sigerd Annika Lukitawati; Ahmad Zakaria; Subuh Tugiono; Dwijoko Winarno
Jurnal Rekayasa Sipil dan Desain Vol 9, No 1 (2021): Edisi Maret 2021
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Continuous waves crashing into the coastal area can cause abrasion on the coast and damage facilities and settlements in the area. Therefore, a coastal protection building is needed to reduce wave energy before arriving at the beach such as a breakwater. To design a breakwater it is necessary to pay attention to wave deformation, one of which is wave diffraction. Where the wave when obstructed by an obstacle will bend around the end of the obstacle and enter the protected area behind it. The complex phenomena of nature are described in terms of equations, but they are difficult to solve analytically. So in this study solved numerically with the help of a computer with 2D wave simulation software based on the principle of the hyperbolic equation propagation model. Then get the results in the form of diffraction coefficient values that are close to the results obtained in the physical model research that has been carried out. Changes in wave height occur after passing through the breakwater which indicates a change in energy from before and after passing through the breakwater.
Analisis Korelasi Data Curah Hujan BMKG dengan TRMM (Studi Kasus Stasiun BMKG di Sumatera Utara) Ibnu Tuhu Pangestu; Ahmad Zakaria; Subuh Tugiono
Jurnal Rekayasa Sipil dan Desain Vol 8, No 1 (2020): Edisi Maret 2020
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Pengukuran curah hujan di Indonesia dilakukan oleh beberapa instansi, diantaranya adalah Badan Meteorologi dan Geofiska (BMKG) dan The Tropical Rainfall Measuring Mission (TRMM) NASA. Keduanya masing-masing memiliki kelebihan dan kekurangan. Tujuan penelitian ini adalah untuk menghitung nilai korelasi data curah hujan antara TRMM dan BMKG dengan mencari persamaan hubungan antar data dan menganalisis data curah hujannya. Data yang digunakan merupakan curah hujan harian dari tahun 1998-2014. Data dianalisis dalam bentuk data 7 harian, bulanan, dan tahunan. Berdasarkan hasil analisis didapatkan jika data curah hujan yang diukur oleh TRMM memiliki kesamaan pola distribusi temporal curah hujan dengan yang diukur oleh BMKG. Nilai korelasi antara data TRMM dan data BMKG menunjukan hasil yang lebih baik jika menggunakan data bulanan, dimana nilai korelasi dari data bulanan 4 stasiun yang dihitung yang terbesar adalah 0,7992 dan yang terkecil adalah 0,5283.
Analisis Pembangkit Listrik Tenaga Mikro Hidro (PLTMH) Studi Kasus : Sungai Air Anak (Hulu Sungai Way Besai) Very Dwiyanto; Dyah Indriana Kusumastuti; Subuh Tugiono
Jurnal Rekayasa Sipil dan Desain Vol 4, No 3 (2016): Edisi September 2016
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This research was conducted in order to calculate the reduction in electrical power that can be generated by a micro-hydro power plant in Air Anak river. The decline in power at the micro-hydro power plant Air Anak river is caused by the presence of sediments that accumulate in the weir micro-hydro power plants, so that reduced water storage that can be streamed to a penstock pipe to generate electrical power. In this study, carried out calculations mainstay river discharge Air Anak by comparison mainstay river discharge Way Besai obtained from the data processing streamflow recorder at the hydroelectric plant reservoirs Way Besai for 11 years from 2004 to 2014 using the Flow Duration Curve method, calculation of electric power generated from the design discharge on micro-hydro power plant Air Anak, calculation of reduction in electrical power at the micro-hydro power plant Air Anak. From the research, design discharge value obtained micro-hydro power plant Air Anak is equal to 0,2565 m3/s with power generated by 2,1962 kW. Power reduction is calculated based on measurements taken 2 times. In streamflow measured at 1,1923 m3/s, water can flow into the pipe by 7 cm generate a discharge of 0,0592 m3/s. Power that can be generated at 1,2326 kW or by 56,12 % of the generated design power. In streamflow measured at 0,5788 m3/s, water can flow into the pipe by 4 cm generate a discharge of 0,0189 m3/s. Power that can be generated at 0,4062 kW or by 18,50 % of the generated design power. Keywords : micro hydro, flow duration curve, electricalpower
Analisis Data Curah Hujan yang Hilang Dengan Menggunakan Metode Normal Ratio, Inversed Square Distance, dan Cara Rata-Rata Aljabar (Studi Kasus Curah Hujan Beberapa Stasiun Hujan Daerah Bandar Lampung) Fanny Prawaka; Ahmad Zakaria; Subuh Tugiono
Jurnal Rekayasa Sipil dan Desain Vol 4, No 3 (2016): Edisi September 2016
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This research is done with the purpose to calculate the correlation of measurable rainfall data with rainfall data on the calculation using each method mentioned above which is every method using three rainfall stasions, four rainfall stasions, and five rainfall stasions. It’s also purposed to decide with how many stasions and what method is resulting the best correlation value. As the result of the research using algebraic average method, normal ratio method, and inversed square distance method with daily rainfall data in a year, cumulative monthly rainfall data, and also average monthly rainfall data, it can be concluded that the greater number of stasions resulting the better correlation value. The correlation value with cumulative monthly rainfall data and average monthly rainfall data using some different number of stasions for each method is resulting a not significant differences with the value of percentage is 0,00025% to 0,01182%. Thecalculation uses cumulative monthly rainfall data and average monthly rainfall data showing the better correlation value than calculation using daily rainfall data in a year (0,67230 - 0,72097compared to 0,19305 - 0,25890). Keywords: Rainfall, normal ratio method, inversed square distance method, algebraic average method
Co-Authors Ahmad Zakaria Annika Lukitawati Arif Dinaryoko didit kuswadi kuswadi Dwijoko Winarno Dyah I Kusumastuti Dyah Indriana Kusumastuti Endro Prasetyo Wahono Fanny Prawaka Holong Togatorop Ibnu Tuhu Pangestu Ivana Aprili Andika Lodewick Manurung Maulana Yusuf Novitasari Novitasari Ofik Taufik Purwadi Ofik Taupik Purwadi Riyo Ardi Yansyah Rizqi Kurniawan Robby Firza Aditya Very Dwiyanto