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All Journal Jurnal Rekayasa Jurnal Rekayasa Sipil dan Desain Teras Jurnal BENTANG : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil Jurnal Teknik Sumber Daya Air J-Sil (Jurnal Teknik Sipil dan Lingkungan) Rekayasa : Jurnal Ilmiah Fakultas Teknik Universitas Lampung
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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LUBANG RESAPAN BIOPORI SEBUAH STRATEGI UNTUK MEMANFAATKAN AIR HUJAN DALAM MENJAGA KELESTARIAN SUMBER AIR DI KOTA BANDAR LAMPUNG Purwadi, Ofik Taufik; Yulianto, Herza; Mashabi, Mashabi
Rekayasa : Jurnal Ilmiah Fakultas Teknik Universitas Lampung Vol 18, No 1 (2014): Edisi April 2014
Publisher : UNIVERSITAS LAMPUNG

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Abstract

The basic principles of water conservation is to prevent the water lost as surface streams and save them as fully as possible into the body of the Earth. A form of utilization of rain water can be done by way of accommodating direct rainwater that falls on the surface of the Earth or water infiltrate into the ground. The first way is the direct way to reuse the rainwater that falls onto the surface of the ground by creating a pond or tub of rainwater collectors. Ways of utilization of rain water with water infiltrate into the soil can be done by make: infiltration well; and/or the infiltration hole biopori. Infiltration Hole Biopori is one technology that has been developed by Brata, these technologies effectively to reduce the potential for flooding and increase soil water reserves through utilization of rain water. Method of making Hole Resapan Biopori it has been widely de- veloped in some area (Jakarta, Jogjakarta etc.), because the technology is so cheap, easy and effi - cient. In the city of Bandar Lampung, the utilization of rain water has not done much, only a few establishments that have been doing this activity. The Agency has articulated the rainwater uti- lization progam was TAPS and AGENCY. At the community level city Bandar Lampung, the use of biopori still sound familiar so that the required infiltration hole making biopori socialization. Making the biopori infiltration hole, it can provide convenience for people living in crowded envi - ronments with land/environment is limited given the size of the biopori infiltration small hole with a diameter of 10 cm and a depth of 100 cm. Making the biopori infiltration hole it can provide in- put infiltration rain water into the ground to become groundwater. In order to perform groundwa - ter conservation through utilization of rain water by making biopori infiltration hole.
Redesign Drainage System and Infiltration Wells Design in Lampung University (Case Study: UNILA Statue-Al-Wasii Mosque) yunianto, mohammad lutfi; Purwadi, Ofik Taufik; Romdania, Yuda
Jurnal Rekayasa Sipil dan Desain Vol 6, No 2 (2018): Edisi Juni 2018
Publisher : Jurnal Rekayasa Sipil dan Desain

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Abstract

Drainage is a way  for removal of excess water with a solution about excess of water. Nevertheless, a lot of drainage systems have a bad performance and out of its function. One of them is drainage system in Lampung University around Al-Wasi’i Mosque-Lampung University statue. One of the solution is environmental arrangement and one of the environmental arrangement is redesign of drainage system. It aim for resolve some flood inundationthat happened  in the rain because failed optimilize in drainage system aroun Al-Wasi’i Mosque-Lampung University statue. The analysis conducted in this research includes hydrology analysis and hydraulics analysis using HEC-RAS 4.1.0 application. Hydrology analysis aims to calculate the design discharge using rational, haspers and weduwen methods and modeling with HEC-RAS 4.1.0 application aims to determine the capacity of the water level  existing channel. So it can be known where the position of the flood point and planning the new channel dimensions. Based on the analysis, the need for dredging at D8-D10 indicating the occurrence of run off  and inundation at across of Al-Wasi’i Mosque. Planning of infiltration wells is also very needed to overcome the problem of frequent flooding in Faculty of Engineering. It is also necessary to decrease run-off discharge in channel around Al-Wasi’i mosque’s areas.The necessary is did concrete lining in base and two-side of channel. 
Analisis dan Perencanaan Sistem Drainase di Lingkungan Universitas Lampung (Studi Kasus Zona I : Fakultas Teknik, Fakultas Ekonomi dan Bisnis, Fakultas Ilmu Sosial dan Politik, Fakultas Hukum) Jamaludin HN, .; Purwadi, Ofik Taufik; Zakaria, Ahmad
Jurnal Rekayasa Sipil dan Desain Vol 6, No 2 (2018): Edisi Juni 2018
Publisher : Jurnal Rekayasa Sipil dan Desain

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Abstract

University of Lampung as one of the first and oldest public university in Lampung Province is one of the best universities in the region of Sumatra and continuously improve the quality of its academic, with the Accreditation A. Enhancement and infrastructure facilities university of Lampung continue, so can improving the academic quality or non-academic. The form of non-academic quality improvement is the environmental arrangement of one of its plans development of drainage system. This is intended to solve some of the flooding puddles that occurred at the time rainy season arrives because not optimal condition of existing drainage in University of Lampung region . The analysis conducted in this research includes hydrology analysis and hydraulics analysis using HEC-RAS 4.1.0 application. Hydrology analysis aims to calculate the design discharge using rational methods and modeling with HEC-RAS 4.1.0 application aims to determine the capacity of the water level existing channel. So it can be known where the position of the flood point and planning the new channel dimensions. Based on the analysis, the need for planning new drainage at some point indicating the occurrence of run off and inundation at Kantin Teknik Prasmanan. Planning of absorption wells and retention ponds is also very needed to overcome the problem of frequent flooding in Faculty of Engineering. It is also necessary to maintain channel maintenance in the form of channel normalization, garbage retaining lattice installation, and periodic cleaning of channels.Keywords: hydrology, hydraulics, HEC-RAS 4.1.0, drainage, absorption wells, andretention ponds.
MATOS ADDITION EFFECT ON SOIL CLAY CBR VALUE MIXED WITH RICE HUSK ASH VIEWED FROM SOAKED TIME Duha, Mayunata; Iswan, Iswan; Purwadi, Ofik Taufik
Jurnal Rekayasa Sipil dan Desain Vol 6, No 2 (2018): Edisi Juni 2018
Publisher : Jurnal Rekayasa Sipil dan Desain

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Abstract

Clay is a type of soil that has high water content and generally has a low soil carrying capacity.  This can cause problems when the soil will be built a construction on it.  Clay will easily saturated when the rainy season comes so that the soil water content therein increases which makes its carrying capacity decreased.  The addition of matos and rice husk ash is one of the methods to stabilize the soil.  With this method, this research is expected to know the effect of the addition of these substances in saturation condition by reviewing the research samples on the value of CBR immersion. This research was conducted at the Laboratory of Soil Mechanics Faculty of Engineering, University of Lampung by making optimum sample which has the highest CBR value then searched the effect of adding the duration of immersion in 7, 14, 21, and 28 days.  The soil samples taken from Sidorejo village, Sidomulyo subdistrict, South Lampung are clay soil which has the original soil CBR value of 7.3% and 31.8% in the CBR optimum curing soil mixture.The soil stabilization method experienced by the sample showed a decrease of CBR value from 15.5% on the duration of the immersion time of 7 days to 8% in the duration of the 28 day immersion time.  This decreased immersion CBR value indicates that the addition of the duration of the immersion time resulted in the CBR value of the soil mixed soil samples decreasing as the soaking time of the soil samples grew. Keywords : Matos, immersion CBR, Rice Husk Ash, Clay.
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 Vol 11, No 2 (2023): Edisi Juni 2023
Publisher : Jurnal Rekayasa Sipil dan Desain

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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.
Pengaruh Metode Pemasangan Pipa Distribusi Terhadap Aliran Hidraulika Purwadi, Ofik Taufik; Awan, Fajriharish Nur; Nugroho, Hendra Satria; Tumijo, Tumijo
Jurnal Teknik Sumber Daya Air Vol. 4 No. 1 (Juni 2024)
Publisher : Himpunan Ahli Teknik Hidraulik Indonesia (HATHI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56860/jtsda.v4i1.86

Abstract

Jumlah debit kebutuhan air bersih yang harus dipenuhi di Kota Bandar Lampung mencapai 1.237,2 Liter/detik, namun tingkat pemenuhan kebutuhan debit air bersih yang ada hanya 525 Liter/detik.  Jaringan perpipaan PDAM di Kota Bandar Lampung belum terbangun di semua wilayah kota Bandar Lampung. Penelitian ini bertujuan untuk menganalisis aliran hidrolika pada pemasangan pipa menggunakan metode HDD dan metode konvensional. Penelitian dilakukan pada 3 lokasi pemasangan pipa. Metode yang digunakan adalah pendekatan deskriptif kuantitatif. Data yang dianalisa berupa data aliran hidrolika yang dibantu dengan software EPANET 2.2. Hasil yang diperoleh adalah kecepatan aliran pada lokasi 1 dan 2 memiliki nilai 0,94 m/s di jam rata rata dan 1,41 m/s pada jam puncak, pada pemasangan di  lokasi 3 memiliki nilai 0,99 m/s di jam rata rata dan 1,49 m/s di jam puncak. Headloss di lokasi 1 memiliki nilai antara 0,00 m sampai dengan 0,4447 m, di lokasi 2 memiliki nilai antara 0,00 m sampai dengan 0,4673 m dan di  lokasi 3 memiliki nilai antara 0,00 sampai dengan 0,7142 m. Tekanan pipa di lokasi 1 memiliki nilai antara 0,546 atm sampai 0,925 atm. Di lokasi 2 memiliki nilai antara 2,050 atm sampai 2,534 atm.dan di lokasi 3 memiliki nilai antara 2,108 atm sampai 2,619 atm. Kata Kunci: Air bersih, HDD, Kehilangan energi, Open cut
Assessment of Development Potential for Central Government Irrigation Zones in Metro City Pratama, Muhammad Vareza; Purwadi, Ofik Taufik; Romdania, Yuda; Zakaria, Ahmad; Herison, Ahmad
Bentang : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil Vol 13 No 2 (2025): BENTANG Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil (July 2025)
Publisher : Universitas Islam 45

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33558/bentang.v13i2.10446

Abstract

The decline in agriculture, forestry, and fisheries sector revenue by 5.24% in Metro City in 2024 necessitates efforts to increase productivity through the development of irrigation areas (D.I). This study aims to analyze the existing conditions of central authority irrigation areas and assess their expansion potential according to the 2013 KP-01 standards. The research employs a mixed-method approach, utilizing quantitative analysis for spatial data processing and planning criteria assessment, complemented by qualitative analysis for interpretation and deepening of results. The findings indicate that the Karangrejo and Tejo Agung Clusters meet all eight criteria of the KP-01 irrigation planning standards, with an increase in irrigated land area from 18.71 hectares to 388.62 hectares. Both clusters demonstrate moderate soil fertility with adequate water sources from the Way Bunut River and reservoir for Karangrejo, and the Batanghari River with D.I. Way Sekampung channel for Tejo Agung. The analysis also confirms the fulfillment of aspects including water availability, farmer presence, road access, land ownership status, flood resistance, and compliance with Metro City's spatial planning (RTRW). In conclusion, the development of irrigation areas in both clusters is feasible and should be implemented through a planned and integrated approach to enhance agricultural productivity and water management effectiveness in Metro City.
Analisis Implementasi Metode Petak Kecil terhadap Pendugaan laju Erosi Lahan Non Vegetasi Sudewa, Wijoyo Mensen; Romdania, Yuda; Herison, Ahmad; Purwadi, Ofik Taufik
Jurnal Teknik Sipil dan Lingkungan Vol. 9 No. 2: Oktober 2024
Publisher : Departemen Teknik Sipil dan Lingkungan IPB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jsil.9.2.303-314

Abstract

Pengelolaan lahan yang tidak tepat kemungkinan besar akan menyebabkan kerusakan yang lebih serius terhadap lahan dan lingkungan, seperti longsor, erosi, sedimentasi, banjir ,dan kekeringan. Erosi tanah ini hasil proses alami yang terjadi karena angin kencang, hujan deras, dan air mengalir. Tujuan penelitian adalah analisis variasi intensitas hujan pada lahan tanpa vegetasi yang mempengaruhi laju erosi dan volume air limpasan serta memperkirakan besarnya laju erosi di waktu mendatang. Metode yang digunakan merupakan metode petak kecil dengan model petak yang berdimensi dengan ukuran panjang 4 m dan lebar 2 m. Dalam analisis hidrologi menggunakan metode aritmatika dan metode mononobe. Dengan variasi intensitas hujan 0,75 liter/menit, 1,00 liter/menit, 1,25 liter/menit, 1,50 liter/menit, dan 1,75 liter/menit didapatkan nilai volume air limpasan terkecil 6,44 liter dan terbesar 10,43 liter. Hal ini menunjukkan lebih banyak air yang melimpas dari pada yang meresap, sehingga energi kinetik air mengalir di permukaan meningkat menyebabkan tanah permukaan tergerus. Kemudian nilai laju erosi mengalami peningkatan seiring kenaikan intensitas hujan dan menghasilkan trendline hubungan antara intensitas hujan dan laju erosi yaitu y = 0,3827x2 + 0,0531x - 0,1828 dimana x adalah variabel intensitas hujan dan y adalah hasil laju erosi. Berdasarkan hasil perhitungan laju erosi dengan nilai intensitas hujan dalam kala ulang 2, 5, 10, 25, 50, dan 100 tahun didapatkan nilai laju erosi terbesar pada kala ulang 100 tahun sebesar 15,6186 ton/ha/tahun. Kesimpulannya adalah intensitas hujan yang tinggi meningkatkan volume air limpasan dan laju erosi dengan perbandingan kuadratik serta perkiraan laju erosi di lokasi penelitian tergolong sangat ringan hingga ringan.
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%.
Testing of Cbr Subgrade Laboratory Laboratory Using Test Modification Testing Conditions Lisdayanti, Celestia; Setyanto, Setyanto; Purwadi, Ofik Taufik
Jurnal Rekayasa Sipil dan Desain 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.v8i1.1254

Abstract

In the implementation of building construction, the main thing to consider is soil material. Based on that assumptions, soil has a role as a construction material and as a placement of construction.. Therefore, one of the examination processes to discover the soil bearing capacity is California Bearing Ratio (CBR) testing. Compaction in the testing has been done within heavy vehicle pressure on field with the amounts; 2.7 MPa,7 MPa, and 8.4 MPa and the soil sample is from Tirtayasa Area, Sukabumi, Bandar Lampung.The result testing in laboratory had been showed that the soils were classified into A-2-7 soil group that was silty sand type. CBR value without soaking process within modified proctor was 9% and for soaking condition soil was 4.2%. Modified laboratory CBR values of without-soaking condition every pressure were 5.5%, 9.4%, and 9.9%, whereas for the soaking condition were 0.77%, 2.6.5, and 3.3%. In conclusion, the values of CBR are increase as the additions of the pressure given.keywords:heavyvehicle, modifiedpressure’s tool, modified CBR laboratorytest.   
Co-Authors abdul, abdul rohman Ahmad Herison Ahmad Zakaria Al Rasyid, Burhan Najib Andius Dasa Putra Angin, Geleng Perangin Auliyak, Alma Sulton Duha, Mayunata Dwi Putra, Arief Rachmat Endro Prasetyo Wahono Essra, Imannurichsan Fajar, Mutiara Fajriharish Nur Awan, Fajriharish Nur Herza Yulianto, Herza Idharmahadi Adha Iswan . Iswan Iswan Jamaludin HN, . Jannah, Humaira Nisaul Lidyawati, Dian Erlisa Lisdayanti, Celestia Manurung, Lodewick Margaretta Welly Mariyanto Mariyanto Mashabi Mashabi, Mashabi Maulana, Sugeng Haris Nugroho, Hendra Satria Pradipta, Singgih Pratama, Muhammad Vareza Rahmadani, Eria Zundi Setyanto Setyanto Subuh Tugiono, Subuh Sudewa, Wijoyo Mensen Sumiharni Sumiharni Tumijo, Tumijo Wijaya, Riki Chandra Yuda Romdania yunianto, mohammad lutfi