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All Journal Jurnal Rekayasa Jurnal Rekayasa Sipil dan Desain Teras Jurnal Jurnal Teknik Sumber Daya Air J-Sil (Jurnal Teknik Sipil dan Lingkungan)
Ofik Taufik Purwadi, Ofik Taufik
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Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Energy Engineering Environmental Science Transportation Other

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Potensi Penyediaan Air Bersih Berkelanjutan melalui Pemanenan Air Hujan (Studi Kasus Pulau Pasaran Kecamatan Teluk Betung Timur Kota Bandarlampung) Jannah, Humaira Nisaul; Purwadi, Ofik Taufik; Fajar, Mutiara
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.v9i4.2166

Abstract

The people of Pasaran Island, Kota Karang Village, Teluk Betung Timur District, Bandar Lampung City in their daily activities rely on clean water distributed by PDAM Way Rilau with a relatively small discharge. Population growth every year will increase the amount of water demand. This study aims to determine the potential of harvesting rainwater as an alternative to fulfill water sources on Pasaran Island. In this study, projection calculations, spatial analysis, hydrological analysis calculations, and water quality laboratory tests were carried out. The calculation results show that the water needs of the people of Pasaran Island in 2030 are 230,75 m3/day with the potential for rainwater that can be accommodated at 5.477,76 m3/day. The quality of rainwater on Pasaran Island has met the quality standards based on the Regulation of the Minister of RI Number 416/MENKES/PER/IX/1990. So that it shows that rainwater on Pasaran Island has the potential to be used as an alternative to fulfill the community's clean water.
Pengujian CBR Laboratorium Lapisan Subgrade Menggunakan Alat Uji Modifikasi Metode Tekan (Pressure Method) Auliyak, Alma Sulton; Putra, Andius Dasa; Purwadi, Ofik Taufik; ., Iswan
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.v9i4.2244

Abstract

Provinsi Lampung merupakan gerbang Pulau Sumatera, sehingga pembangunan infrastruktur saat ini semakin berkembang pesat. Pembangunan konstruksi tersebut sangat erat berkaitan dengan daya dukung tanah karena tanah merupakan material yang berperanan penting dalam menopang suatu konstruksi. Untuk mengetahui kekuatan daya dukung tanah yang baik maka dilakukan pengujian CBR. Sampel tanah yang dipakai diambil dari daerah Tirtayasa, Sukabumi, Bandar Lampung. Terdiri dari sampel CBR proctor standar dan modified tanpa rendaman, dan CBR tekanan sebesar 5 MPa, 10 MPa, 15 MPa menggunakan tiga sampel tanah pada masing-masing tekanan. Dari hasil penelitian di laboratorium menunjukkan bahwa hasil CBR proctor tanpa rendaman standar dan modified yaitu sebesar 3,3% dan 5,8%. Sementara nilai CBR tekanan tanpa rendaman standar 5 MPa, 10 MPa, 15 Mpa yaitu sebesar 2,6%, 3,8%, 5,8%, serta CBR tekanan tanpa rendaman modified yaitu sebesar 5%, 6%, 8,3%. Dari hasil tersebut nilai CBR proctor baik standar maupun modified berada di antara tekanan 5 MPa dan 10 Mpa.
Studi Transmisi Gelombang Dengan Model Cylinder Concrete (Buis Beton) Breakwater Tenggelam Dengan Permodelan Fisik 2D Manurung, Lodewick; Tugiono, Subuh; Zakaria, Ahmad; Purwadi, Ofik Taufik
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 10 No. 1 (2022): Edisi Maret 2022
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v10i1.2540

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%.
Analisis Kapasitas Saluran Drainase Di Jl. Kartini Kecamatan Tanjung Karang Pusat Kota Bandar Lampung Maulana, Sugeng Haris; Sumiharni, Sumiharni; Purwadi, Ofik Taufik; Mariyanto, Mariyanto
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 11 No. 2 (2023): Edisi Juni 2023
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v11i2.3465

Abstract

The Bandar Lampung area which is quite routinely hit by floods is in Tanjung Karang Pusat District, the Jl. Wolter Monginsidi to Jl. Kartini. The reason is the high rainfall, as well as the curved road conditions and the performance of the drainage channel that is not optimal enough to accommodate the water discharge before carrying it to the Way Awi river which is on the road. The option that can be taken to reduce the risk of flooding is by evaluating the drainage channels on the road, taking into account the capacity of the drainage channels so that they are able to accommodate the flood discharge through them. The design discharge is calculated using hydrological analysis, rational methods, and based on maximum rainfall data for the last 10 years. For channel discharge capacity is calculated using hydraulics analysis and Manning's formula. The results of the analysis of the existing discharge capacity in most of the drainage channel segments are still able to accommodate the planned discharge with a 5-year return period of rain, so there is no need to increase the dimensions, except for segment 4, because the existing drainage capacity (Qs) is 0.700 m3/s smaller than design discharge (Qr) 1,238 m3/s. These conditions require the need to increase the dimensions of the drainage channel in order to accommodate the discharge through it.  Key words : drainage, hydrological analysis, hydraulic analysis, flooding.
Evaluasi Penilaian Kinerja Irigasi dan Angka Kebutuhan Nyata Pengelolaan Irigasi Way Merias Kabupaten Lampung Tengah Rahmadani, Eria Zundi; Wahono, Endro P; Purwadi, Ofik Taufik
Teras Jurnal : Jurnal Teknik Sipil Vol. 14 No. 2 (2024): Volume 14 Nomor 2, September 2024
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v14i2.1179

Abstract

Abstrak Kegiatan operasi dan pemeliharaan (O&P) irigasi adalah bagian dari manajemen irigasi yang bertujuan untuk keberlangsungan dan kemandirian sistem irigasi. Di wilayah irigasi ini, belum pernah dilakukan pemulihan atau perbaikan secara berkala, sehingga asset irigasi terus mengalami penurunan fungsi. maka diperlukan studi evaluasi kinerja irigasi dan angka kebutuhan nyata pengelolaan irigasi (AKNPI). Daerah Irigasi Way Merias merupakan Daerah Irigasi yang berada di bawah kewenangan Dinas Sumber Daya Air Kabupaten Lampung Tengah, daerah irigasi Way Merias memiliki luas fungsional 79.44 Ha dari luas baku dan potensial yang dimanfaatkan secara fungsional. Daerah Irigasi Way Merias, Kabupaten Lampung Tengah, masih di bawah standar di mana pada Permen PUPR No. 12/PRT/M/2015 menjelaskan untuk katergori Nilai Bobot 80-100 kinerja irigasi tersebut sangat baik, sedangkan pada Daerah Irigasi Way Merias nilai kinerja sistem irigasi 55-69 bahwa pada daerah irigasi tersebut kurang dan perlu perhatian, Total biaya yang dibutuhkan untuk pengelolaan daerah irigasi Way Merias adalah sebesar Rp 317.803.367. Kata kunci: Operasi Dan Pemeliharaan, Angka Kebutuhan Nyata Pengelolaan Irigasi. Kinerja Irigasi,   Abstract Irrigation operation and maintenance (O&M) activities are part of irrigation management which aims to ensure the sustainability and independence of the irrigation system. In this irrigation area, regular restoration or repairs have never been carried out, so irrigation assets continue to decline in function. Therefore, an evaluation study of irrigation performance and real irrigation management needs (AKNPI) is needed. The Way Merias Irrigation Area is an irrigation area under the authority of the Central Lampung Regency Water Resources Service. The Way Merias irrigation area has a functional area of 79.44 Ha. The Way Merias Irrigation Area, Central Lampung Regency, is still below standard. In PUPR Ministerial Decree No. 12/PRT/M/2015 explains that for the Weight Value category 80-100 the irrigation performance is very good, whereas in the Way Merias Irrigation Area the irrigation system performance value is 55-69, which means that in this irrigation area it is lacking and needs attention. from the standard and potential area utilized functionally. The total costs required to manage the Way Merias irrigation area are IDR 317,803,367. Keywords: Operation and Maintenance, Real Needs Figures for Irrigation Management
Desain Penampang Sungai Way Besai Melalui Peningkatan Kapasitas Sungai Menggunakan Softwere HEC-RAS Utami, Tri; Purwadi, Ofik Taufik; Susilo, Gatot Eko
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 4 No. 2 (2016): Edisi Juni 2016
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v4i2.365

Abstract

Way Besai river is located in Sumberjaya subdistrict, West Lampung district, Lampung. It is one of the sub river from Tulang Bawang river. Way Besai river has been used as a the electric power source, known as Besai hydropower. Besai Hydropower has decreased energy supply of 40 MW from the supply optimum can reachs 90 MW. his is due to the catcment area conditions of the Way Besai rivers are "metastable" so which effected in the shallowing of the cross-section quickly. So it needs the capacity increased of the cross-section of the river until the early condition where is the supply can reachs 90 MW.For the first step in improving the capacity of the Way Besai river needed hydraulics river simulation process that facilitated by using Hydrologic Engineering Center-River Analysis System (HEC-RAS) Program. HEC-RAS program can help to modeling the flow of cross-section of the river on the existing condition and normalization using the steady flow options and data input including maximum discharge data. The output of modeling using HEC-RAS program can be seen in the form of pictures and a table that presents the characteristics of a cross-section of the river.From the result of the analysis founded that to reach the normalization condition, needs the dredging until the elevation +713,00 level, with 2.435.590,09 m3 of volume capacity of dredging. When the water level of the river reachs Full Supply Level (FSL) elevation that is on elevation +722,00 level founded that the maximum discharge in the downstream in the amount of 57,19 m3/s, with water volume capacity in the 1.471.185,77 m3. For the Reservoir Surface Area in Way Besai river has increased with 28,6% from the exsisting condition that recorded from Sta 0+000 level until sta 3+391,45 level Keywords: Debit ,HEC-RAS, Manning calibration , Normalization, River.
Kajian Pengelolaan Sumber Daya Air Permukaan Berbasis Geographics Information System (GIS) di Kota Bandar Lampung Iskhaq, Firdaus bin; Purwadi, Ofik Taufik; Perangin angin, Geleng
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 4 No. 3 (2016): Edisi September 2016
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v4i3.393

Abstract

Bad water resource management caused water availability unable to be fulfiled to the maximum level throughout the year, especially in the dry season. The water crisis becomes a difficult problem because  the tendency of people’s anticipation only glued to the conventional water sources which are susceptible to dry out, such as wells and others. This study aimed to determine the condition of surface runoff resources in the Bandar Lampung city. And also to provide a solution of problems that often occur in the Bandar Lampung city, especially in the dry season. This research conducted using MWGIS software as a program for making geographical information of Bandar Lampung city conditions in general and  rivers condition specifically. In this digital era, information of rivers based on digital data are required for society and the government as an instrument to establish decisions and policies in the management of surface runoff resources, especially in case of rivers in Bandar Lampung city. The output from MWGIS is an illustration of a geographical condition of Bandar Lampung city which in simple form map contains a variety of information that related to the geographical conditions, such as land cover data, topography, slopes, rivers, districts, villages and many others depend on how far the manufacturing database / information in MWGIS required.
Studi Air Tanah Berbasis Geographics Information System (GIS) di Kota Bandar Lampung jp, dheni saputra; Purwadi, Ofik Taufik; Sumiharni, Sumiharni
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 4 No. 3 (2016): Edisi September 2016
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v4i3.445

Abstract

Penelitian ini dilakukan untuk memberikan informasi dan gambaran umum kepada masyarakat tentang air tanah yang ada dengan cara menginventarisasi, mengeksploitasi, mengeksplorasi dan konservasi air tanah di Kota Bandar Lampung. Studi ini menggunakan program Geographic Information System (GIS) yang didukung dengan data sekunder berupa peta Bandar Lampung, data air tanah serta data curah hujan. Dalam penelitian ini dilakukan digitasi terhadap peta yang terdiri dari peta kondisi eksisting Bandar Lampung yang selanjutnya dioverlay dengan titik lokasi sumur bor menggunakan program GIS. Selain proses digitasi, dilakukan pula analisa neraca air tanah yakni antara tinggi air pengambilan sumur bor dengan tinggi hujan yang terinfiltrasi. Hasil dari penelitian didapatkan nilai keseimbangan air di tiap zona infiltrasi pada tahun 2006 yakni untuk zona infiltrasi <1.10-2 cm/detik selisihnya sebesar 7,909 m/tahun, zona infiltrasi antara 1.10-2 - 2.10-2 cm/detik selisih 7,896 m/tahun dan zona infiltrasi > 2.10-2 cm/detik 7,881 m/tahun. Jika diasumsikan setiap tahun mengalami peningkatan jumlah sumur sebesar 10% maka pada tahun 2016, untuk zona infiltrasi <1.10-2 cm/detik selisihnya sebesar 7,896 m/tahun, zona infiltrasi antara 1.10-2 - 2.10-2 cm/detik selisih 7,863 m/tahun dan zona infiltrasi >2.10-2 m/detik 7,823 m/tahun. Dari hasil analisa tersebut bisa disimpulkan pada tahun 2016 air tanah masih mencukupi untuk kebutuhan Kota Bandar Lampung, namun jika di lanjutkan sampai tahun 2079 kemungkinan akan mengalami krisis air tanah.Kata kunci : air tanah, neraca air, Geographics Information System (GIS)
Analisis dan Perencanaan Sistem Drainase di Lingkungan Universitas Lampung(Studi Kasus Zona II : Fakultas Matematika dan Ilmu Pengetahuan Alam, Fakultas Kedokteran dan Fakultas Keguruan dan Ilmu Pendidikan) Kusuma, Widi Teja; Purwadi, Ofik Taufik; Sumiharni, Sumiharni
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 6 No. 3 (2018): Edisi September 2018
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v6i3.849

Abstract

Lampung University as one of the first and oldest universities in Lampung Province is one of the best universities in Sumatra and continues to improve its academic quality, and have A Accreditation. The improvement of Lampung University facilities and infrastructure is continuously conducted in order to improve both academic and non-academic quality. The form of non-academic quality improvement is environmental arrangement with the drainage system planning. It is intended to solve some of the flood puddles that occurred during the rainy season due to the lack of optimal condition of existing drainage in the University of Lampung.The analysis conducted in this research includes hydrological analysis and hydraulics analysis. Hydrological analysis aimed to calculate the discharge plan using rational method and hydraulic analysis aims to calculate the capacity of existing drainage channels. So we can know the position of the flood point and planning the new channel dimension.Based on the analysis of the flood point occurred at DN15 cross section with 9.5 m long overflow which is located in front of the entrance portal of Faculty of Mathematics and Sciences. There are also some new drainage section design at DN63 point along 56 m, DN64 along 45 m and DN65 along 67 m as they are still a natural drainage. It is also necessary to give the drainage channel maintenance by channel normalization, garbage retaining lattice installation, and periodic cleaning of channels.
Analisis dan Desain Sistem Drainase di Lingkungan Universitas Lampung (Studi Kasus: Zona III Wilayah Rektorat – Fakultas Pertanian) Effendi, Rahmat; Purwadi, Ofik Taufik; Herison, Ahmad
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 6 No. 3 (2018): Edisi September 2018
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v6i3.895

Abstract

Water problems consist of three types: flood, drought, and water pollution. Floods are recognized as a significant source of threat to human life. One of the flood prevention actions that can be done is to optimize the drainage channels. Drainage can be defined as a technical action to reduce excess water so that the function of the area or land is not disturbed. University of Lampung is one of the locations prone to flooding. Therefore, a research to overcome the flood that occurred at the University of Lampung has been conducted (Case Study: Zone III Rectorate Area - Faculty of Agriculture). The purposes of this research are to analyze the drainage system of University of Lampung and to design drainage system that fulfill flood discharge plan. The research was conducted by survey in the field. The analysis conducted in this study include hydrological analysis and hydraulics analysis using HEC-RAS4.1.0 application. Calculation of discharge plan using rational method.. Based on the analysis results, there are no channels that are not sufficient for flood discharge, but there are some channels that are disconnected and cause the water to not flow. The disconnected channels are located on the channel with the DN5 and DN62 codes. For that, it is recommended to create a channel connecting DN62 channel with DN63, and make a channel on channel DN5 to DN65. The budget required for the repair of this channel is Rp 207,203,725.00 (Two Hundred Seven Million Two Hundred and Three Thousand Seven Hundred Twenty Five Rupiah).Keywords: Drainage, HEC-RAS, hydrology, hydraulics, floods
Co-Authors Ahmad Herison Ahmad Zakaria Al Rasyid, Burhan Najib Andius Dasa Putra Angin, Geleng Perangin Auliyak, Alma Sulton Dewi, Elisa Rahmawati Duha, Mayunata Dwi Putra, Arief Rachmat Endro Prasetyo Wahono Essra, Imannurichsan Fajar, Mutiara Fajriharish Nur Awan, Fajriharish Nur Gatot Eko Susilo Geleng Perangin Angin, Geleng Herza Yulianto, Herza Idharmahadi Adha Iskhaq, Firdaus bin Iswan . Iswan Iswan Jamaludin HN, . Jannah, Humaira Nisaul jp, dheni saputra Kusuma, Widi Teja Lidyawati, Dian Erlisa Lisdayanti, Celestia Manurung, Lodewick Margaretta Welly Mariyanto Mariyanto Mashabi Mashabi, Mashabi Maulana, Sugeng Haris Nugroho, Hendra Satria Pradipta, Singgih Rahmadani, Eria Zundi Rahmat Effendi, Rahmat Setyanto Setyanto Subuh Tugiono, Subuh Sudewa, Wijoyo Mensen Sumiharni Sumiharni Tri Utami Tumijo, Tumijo Yuda Romdania yunianto, mohammad lutfi