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All Journal Teknik Sipil dan Arsitektur Jurnal Rekayasa Sipil dan Desain Jurnal Teknik Sipil dan Arsitektur J-Sil (Jurnal Teknik Sipil dan Lingkungan) Nemui Nyimah
Subuh Tugiono, Subuh
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Agriculture, Biological Sciences & Forestry Humanities Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Engineering Environmental Science Transportation Other

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EVALUASI EROSI TANAH BERVEGETASI DENGAN ALAT RAINFALL SIMULATOR (TES EKSPERIMENTAL DI LABORATORIUM) Azzahra, Iftasya Shafa; Romdania, Yuda; Herison, Ahmad; Tugiono, Subuh; Murda, Gung Bagus J
Jurnal Teknik Sipil dan Arsitektur Vol. 29 No. 2 (2024): JURNAL TEKNIK SIPIL DAN ARSITEKTUR
Publisher : Fakultas Teknik Universitas Tunas Pembangunan Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36728/jtsa.v29i2.3724

Abstract

Hujan adalah bagian dari siklus hidrologi yang paling berbahaya karena dapat menyebabkan erosi. Penelitian di Kebun Kolektif TP PKK Kota Bandar Lampung mengindikasikan kekurangan unsur hara akibat erosi yang disebabkan oleh limpasan air hujan, ditambah dengan kondisi lahan yang cukup curam. Tujuan penelitian adalah menganalisis pengaruh variasi kemiringan dan intensitas curah hujan terhadap laju erosi serta upaya pengendaliannya. Metode yang digunakan pada penelitian ini adalah rainfall simulator. Hasil dari penelitian adalah laju erosi terkecil terjadi pada intensitas curah hujan 0,75 liter/menit dan kemiringan lereng 8% terjadi sebesar 0,04 Ton/Ha sedangkan laju erosi paling besar terjadi yaitu pada intensitas curah hujan 1,75 liter/menit dan kemiringan lereng 45% terjadi sebesar 0,59 Ton/Ha, terlihat bahwa intensitas curah hujan dan kemiringan lereng mempunyai pengaruh signifikan terhadap laju erosi tanah, laju erosi semakin meningkat seiring dengan kedua faktor tersebut. Kesimpulannya adalah curah hujan dengan intensitas tinggi dan kemiringan lereng yang curam meningkatkan laju erosi yang dapat merusak struktur tanah, sehingga perlu dilakukan teknik konservasi untuk mengurangi laju erosi dan menjaga kesuburan tanah, seperti pemeliharaan vegetasi penutup tanah dan penyuluhan teknik konservasi tanah bagi petani dan masyarakat. Kata kunci: Siklus Hidrologi, Vegetasi, Limpasan, Curah Hujan, Kemiringan Lereng
Evaluation of the Safety of the Way Sekampung Bridge Against Extreme Flooding for the 50 Year Return Period Al Rasyid, Burhan Najib; Purwadi, Ofik Taufik; Tugiono, Subuh; Zakaria, Ahmad
Jurnal Teknik Sipil dan Lingkungan Vol. 10 No. 1: April 2025
Publisher : Departemen Teknik Sipil dan Lingkungan IPB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jsil.10.1.87-96

Abstract

The purpose of this study is to evaluate the Sekampung Way Bridge, which is located on the Sumatra Cross Road on the border between Bumi Agung Village in Tegineneng District, Pesawaran and Mandah Village in Natar District, South Lampung, with coordinates 105°10'33.75"T 5°11'49.65"S, is in the process of being rebuilt to improve services to road users. In conducting a bridge planning study, river hydrological factors must be analyzed to take into account the flood level and vertical clearance, so that the bridge remains safe despite extreme flooding. According to the Highway regulations, permanent bridges are generally planned with a building life of 50 years, For rivers that do not carry drift, the minimum clearance value is 1.0 meter. Therefore, the hydrological analysis was carried out using the Nakayasu HSS method with a Q50 discharge of 426.96 m³/second in 2.7 hours. From the results of 1D and 2D hydraulic analysis using HEC-RAS version 6.4.1, it shows that the elevation of the flood water level with a 50-year re-period is at an elevation of +75.23 m to +75.38 m, while the base elevation of the Way Sekampung Bridge is at an elevation of +79.44 m. Therefore, the clearance of the Way Sekampung Bridge is 4.21 m to 4.06 m, so it can be concluded that this bridge is safe from flood risk with a 50-year re-enactment period, although the potential for flooding around the Way Sekampung river bridge area is large. This is due to the slope of the river around the location of approximately 2.5%.
Analisis Korelasi Data Curah Hujan BMKG dengan TRMM (Studi Kasus Stasiun BMKG di Sumatera Utara) Tuhu Pangestu, Ibnu; Zakaria, Ahmad; Tugiono, Subuh
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 8 No. 1 (2020): Edisi Maret 2020
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v8i1.1280

Abstract

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.
Comparative Analysis of Measured Tidal Data with Tidal Data from Forecasting (Case Study of Tanjung Priok Tidal Station) Dinaryoko, Arif; Zakaria, Ahmad; Tugiono, Subuh
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 9 No. 1 (2021): Edisi Maret 2021
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v9i1.1693

Abstract

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
Analisis Pemodelan Numerik Redaman Breakwater Tenggelam Tipe Berlubang dan Tidak Berlubang Menggunakan Sigerd Lukitawati, Annika; Zakaria, Ahmad; Tugiono, Subuh; Winarno, Dwijoko
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 9 No. 1 (2021): Edisi Maret 2021
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v9i1.1714

Abstract

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 Kinerja Redaman Gelombang pada Breakwater Tenggelam Tipe Berlubang Dengan Pemodelan Fisik 2D Andika, Ivana Aprili; Tugiono, Subuh; Zakaria, Ahmad; Wahono, Endro P.
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 9 No. 1 (2021): Edisi Maret 2021
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v9i1.1722

Abstract

Loss of land due to coastal erosion that occurs naturally by wave abrasion. Therefore, to protect the coast from erosion or other matters, a breakwater is needed which destroys the energy of the waves before reaching the shore. This is the background of the author in taking the title of the thesis about the Performance Analysis of Wave Attenuation in the Hollow Type Breakwater Submerged Type 2-D Physical Modeling. The variables used in this study were incident wave height (Ho), calm water level (ds), and breakwater type. The results of this study indicate that the damping coefficient (Cr) was obtained using a sinking breakwater without a hole with a calm water level (ds) of 2 cm of 0.479 which is the most effective damping produced in an experiment using a breakwater that is free from calm water surface (ds). 2 cm. The wave attenuation obtained from the wave defraction test using 2 types of breakwaters resulted that the breakwater without the damping hole was greater than using a perforated breakwater.
Analisis Perbandingan Pola Aliran Pada Bangunan Pelimpah Ogee Dan Stepped Dengan Model Fisik 2D Aditya, Robby Firza; Wahono, Endro Prasetyo; Tugiono, Subuh
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 9 No. 1 (2021): Edisi Maret 2021
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v9i1.1737

Abstract

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 Pengaruh Kemiringan dan Bentuk Dasar Fishway Terhadap Rasio Perpindahan Sidat (Anguilla bicolor, sp) Yusuf, Maulana; Wahono, Endro Prasetyo; Kusumastuti, Dyah Indriana; Tugiono, Subuh
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 9 No. 2 (2021): Edisi Juni 2021
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v9i2.1754

Abstract

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 Kurniawan, Rizqi; Tugiono, Subuh; Wahono, Endro Prasetyo; Zakaria, Ahmad
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 9 No. 4 (2021): Edisi Desember 2021
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v9i4.2095

Abstract

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
Studi Difraksi Gelombang Melalui Breakwater Tenggelam dengan Variasi Panjang Gelombang Haz, Arzuu Abnu; Zakaria, Ahmad; Tugiono, Subuh; Joko, Dwi
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 9 No. 4 (2021): Edisi Desember 2021
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v9i4.2207

Abstract

Indonesia merupakan negara dengan garis pantai terpanjang urutan kedua di dunia yang mempunyai panjang garis pantai lebih dari 50.000 kilometer.Dengan garis pantai sepanjang itu, daerah di sekitar kawasan pantai mempunyai potensi yang sangat besar untuk dikembangkan, akan tetapi daerah tepian pantai akan mudah mengalami kerusakan akibat terjangan gelombang yang besar. Breakwateradalah struktur yang dibangun untuk melindungi fasilitas di daerah pesisir/pantai.Dalam analisis ini digunakan data, antara lain : tinggi gelombang terdifraksi, koefisien difraksi, tinggi gelombang dating.Hasil penelitian menunjukan bahwa perambatan gelombang 2-D mengambarkan suatu pola perambatan gelombang yang terdifraksi akibat bangunan pemecah gelombang (breakwater) tipe trapesium. Jarak muka air bebas, panjang gelombang dan tinggi gelombang mempengaruhi terjadinya difraksi.Semakin kecil nilai jarak muka air maka semakin kecil koefisien difraksinya. Semakin kecil nilai jarak muka air maka semakin besar periodenya. Hasil dari running program sigerd menunjukkan bahwa jarak muka air bebas tenang juga mempengaruhi ketinggian elevasi gelombang itu sendiri.
Co-Authors Aditya, Robby Firza Ahmad Herison Ahmad Zakaria Al Rasyid, Burhan Najib Amrizal Amrizal Andika, Ivana Aprili Azzahra, Iftasya Shafa Dinaryoko, Arif Dwiyanto, Very Dyah Indriana Kusumastuti Elvida, Maharani Endro Prasetyo Wahono Harmen, Harmen Haz, Arzuu Abnu Joko, Dwi Kurniawan, Rizqi Kusumastuti, Dyah I kuswadi, didit kuswadi Lukitawati, Annika Manurung, Lodewick Martinus, Martinus Maulana Yusuf Muhammad Irsyad Murda, Gung Bagus J Novitasari Novitasari Nur Arifaini Ofik Taufik Purwadi, Ofik Taufik Prawaka, Fanny Purwadi, Ofik Taupik Rachmanda, Farhan Riyo Ardi Yansyah, Riyo Ardi Taufik Hidayat Togatorop, Holong Tomi, Muhammad Tuhu Pangestu, Ibnu Wahono, Endro Praseyto Winarno, Dwijoko Yuda Romdania