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All Journal Jurnal Rekayasa Jurnal Rekayasa Sipil dan Desain Jurnal Aplikasi Teknik Sipil
Ofik Taufik Purwadi
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Civil Engineering, Building, Construction & Architecture Other

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Analysis of River Sediment Transport Way Sekampung (Upstream of Batutegi Dam) Using an Empirical Approach and HEC-RAS Modeling singgih pradipta; ofik taufik purwadi; margaretta welly
Jurnal Rekayasa Sipil dan Desain Vol 8, No 4 (2020): Edisi Desember 2020
Publisher : Jurnal Rekayasa Sipil dan Desain

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Abstract

Dams have various functions and benefits, such as irrigation sources, flood control, power generation, tourism etc. The problem that is concerned about the dams that have been built in developing countries such as Indonesia is in particular the problem of sedimentation in the reservoir. Way Sekampung is one of the rivers which is the source of water in the Batutegi reservoir. Way Sekampung has a large discharge. However, Way Sekampung which has a fairly heavy flow also carries sediment which must be taken into account so as not to disturb the stability of the existing river. Therefore, a research was conducted on sediment discharge and transport in the Way Sekampung river. The discharge analysis used field current meter data and sediment analysis used field sediment samples. Comparative data is calculated using the HEC-RAS application so that there are variations in the discharge in the calculation. The Way Sekampung River produces a sediment discharge of 0.0814 m3 / s at Cross Section 1 and 0.0999 m3 / s in Cross Section 2 using the Meyer Peter and Muller method. Compared with empirical calculations, the sediment rate value is 0.0822 m3 / s in Cross Section 1 and 0.0798 m3 / s in Cross Section 2 using HEC-RAS discharge modeling and Einstein method.
Kajian Penggunaan Metode Empiris dalam Menentukan Debit Banjir Rancangan pada Perencanaan Drainase (Review) Ahmad Herison; Yuda Romdania; Ofik Taufik Purwadi; Rahmat Effendi
Jurnal Aplikasi Teknik Sipil Vol 16, No 2 (2018)
Publisher : Departemen Teknik Infrastruktur Sipil Institut Teknologi Sepuluh Nopember Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (518.851 KB) | DOI: 10.12962/j2579-891X.v16i2.3819

Abstract

Air merupakan faktor terpenting, apabila tidak dikelola dengan baik dapat menimbulkan kerugian, salah satunya adalah banjir.  Pencegahan banjir dengan mengoptimalkan saluran drainase. Kegiatan ini bertujuan untuk mereview penelitian terdahulu mengenai peren­canaan drainase, khususnya metode yang dipakai untuk menghitung debit banjir ranca­ngan.  Metode yang digunakan antara lain: Metode Rasional, Weduwen dan Melchior.  Pe­ne­tapan masing masing metode bergantung pada data hujan, karakteristik daerah aliran, dan data debit. Berdasarkan review, penetapan metode untuk menghitung debit banjir rancangan didasarkan pada luas daerah tangkapan airnya.  Lokasi penelitian yang memi­liki luas DAS 0,53 ha sampai 97,34 ha menggunakan Metode Rasional, luas Daerah Aliran Sungai (DAS) 392, 1 ha menggunakan Metode Weduwen, luas DAS 77.088,8 ha meng­gunakan Metode Melchior. Kesimpulannya adalah, perhitungan debit banjir rancangan dengan luas DAS kurang dari 300 ha menggunakan Metode Rasional.Keywords: drainage, flood discharge design, rational method, melchior
Studi Transmisi Gelombang Dengan Model Cylinder Concrete (Buis Beton) Breakwater Tenggelam Dengan Permodelan Fisik 2D Lodewick Manurung; Subuh Tugiono; Ahmad Zakaria; Ofik Taufik Purwadi
Jurnal Rekayasa Sipil dan Desain Vol 10, No 1 (2022): Edisi Maret 2022
Publisher : Jurnal Rekayasa Sipil dan Desain

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Abstract

One way to prevent damage caused by sea waves is to build a breakwater to reduce wave energy before it reaches the coast. In making the breakwater model the author chose to make a breakwater model with a concrete cylinder because it can be obtained easily. The research data obtained wave height (H), wavelength (L), and wave period (T). From the research data obtained, it can be made a table of incident wave height (H0), transmission wave height (Ht), and wave transmission coefficient (Kt). In this study, 12 models were used, namely 4 breakwater devices with different breakwater widths (lb), and in each breakwater device using 3 heights of still water level clearance or ds (2 cm, 4 cm, and 6 cm). Based on the research, the smallest transmission coefficient value occurs in the longest lb with ds of 2 cm, which is 0.3567 and the largest transmission coefficient occurs in the shortest lb with ds of 6 cm, which is 0.7190. The biggest change in wavelength occurred in the longest lb with ds 2 cm, which was 21.57% and the smallest change occurred in the shortest lb with ds 6 cm, which was 9.23%. The biggest change in wave propagation speed occurred in the longest lb with ds 2 cm, which was 20.14% and the smallest change occurred in the shortest lb with ds 6 cm, which was 5.93%.
Co-Authors Ahmad Herison Ahmad Zakaria ARIEF RACHMAT DWI PUTRA Astika Murni Lubis Celestia Lisdayanti dheni saputra jp Dyah Indriana Kusumastuti Eria Zundi Rahmadani Firdaus bin Iskhaq Gatot Eko Susilo Geleng Perangin Angin Humaira Nisaul Jannah Idharmahadi Adha Lodewick Manurung Margaretta Welly Mutiara Fajar Nining Wahyuni Rahmat Effendi Setyanto Setyanto singgih pradipta Subuh Tugiono Sumiharni Sumiharni Tri Utami Yuda Romdania