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All Journal VALENSI MEDIA KOMUNIKASI TEKNIK SIPIL Jurnal Rekayasa Jurnal Rekayasa Sipil dan Desain Briliant: Jurnal Riset dan Konseptual Teras Jurnal Science and Physics Education Journal (SPEJ) BENTANG : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil Pendas : Jurnah Ilmiah Pendidikan Dasar EKOLOGIA : Jurnal Ilmiah Ilmu Dasar dan Lingkungan Hidup Riyadhoh : Jurnal Pendidikan Olahraga Jurnal Teknik Industri Terintegrasi (JUTIN) Journal Coaching Education Sports Journal of Infrastructural in Civil Engineering (JICE) Teknika Sains : Jurnal Ilmu Teknik Warta AKAB Unnes Journal of Mathematics Education Indonesian Journal of Research and Educational Review (IJRER) e-SPORT: Jurnal Pendidikan Jasmani, Kesehatan dan Rekreasi Indonesian Journal of Chemical Studies (Indones. J. Chem. Stud.) Jurnal Teknik Sumber Daya Air SENTRI: Jurnal Riset Ilmiah Informasi dan Promosi Kesehatan JPM-AKA Rona Teknik Pertanian PEDAMAS (Pengabdian Kepada Masyarakat) Jurnal Pengembangan Ilmu dan Praktik Kesehatan JSEHT Journal of Plano Studies International Journal of Science, Technology and Applications J-Sil (Jurnal Teknik Sipil dan Lingkungan) Journal Of Biology Education Research (JBER) Rekayasa : Jurnal Ilmiah Fakultas Teknik Universitas Lampung Nemui Nyimah Datum: Journal of Geodesy and Geomatics
Ahmad Zakaria
Fakultas Matematika dan Ilmu Pengetahuan Alam, Departemen Kimia, Institut Pertanian Bogor
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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 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.
Penggunaan Pasir Seragam pada Perbaikan Subgrade Ditinjau Terhadap Tebal Perkerasan Jalan (Swelling Potential dan Non Swelling Potential) Pratiwi, Ayu Ning Trias; Iswan, Iswan; Zakaria, Ahmad
Jurnal Rekayasa Sipil dan Desain 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.v9i2.1761

Abstract

Subgradeis the most important part to be used as the focus and support of all construction loads that are on it. If the subgrade is clay soil that has a low carrying capacity and is very sensitive to moisture content, then nearby buildings will often suffer damage, such as land located in Marga Kaya Village. In this study using the method of mixing native soil with stabilization material in the form of uniform sand derived from Mount Sugih with a mixture variation of 5%, 10% and 15% of the dry weight of the soil. The test results showed cbr unsoaked and soaked maximum occurred in sand mixture 15% with CBR Unsoaked value of 13.2% and CBR Soaked with a value of 2.9%. Road pavement thickness on CBR Unsoaked and Soaked efficiently on sand mixture 15% with thickness D1 = 2.75 cm, D2 = 20 and D3 = 10 cm, and CBR Soaked with thickness D1 = 8.75 cm, D2 = 20 cm and D3 = 10 cm. The value of swelling decreased from 11.4% to 7.4% in the addition of uniform sand by 15%. DDT value is influenced by cbr value the greater cbr value then DDT will increase.
The influence of el nino and la nina on rainfall data of east lampung regency, lampung province Gani, Rama Dian; Zakaria, Ahmad; Kusumastuti, Dyah Indriana
Jurnal Rekayasa Sipil dan Desain 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.v9i2.1763

Abstract

This research was conducted to determine the impact of the areas where El Nino and La Nina were the most dominant. The data used in this study are daily rainfall data in 5 rain stations located in East Lampung. Data length from 1989 to 2018 at each station, this data was taken from the Mesuji River Basin - Sekampung (BBWSMS). This modeling is carried out using a data length of 30 years for a data term of 10957.By using observational data and applying it in 2 programs, namely the Fast Fourier Transform (FFT) and the Lomb Periodogram, it produces values that can be graphed for the spectrum of each of the 5 rain station areas, namely Jepara Lake, Labuhan Ratu, Taman Negeri, Kota Raman and Sri Gading. From the results, it can be seen which areas are predominantly affected by El Nino and La Nina. Based on the results of the two programs, both show that the rain station in the Lake Jepara area experiences more dominant El Nino and La Nina influences. Keywords: El Nino, La Nina, rain station, rainfall, Fast Fourier Transform, Lomb Periodogram
Comparative Analysis of Tidal Data from Forecasting Results with Measured Tide Data (Meneng Tidal Station Case Study) Purna, Bagus Mustofa; Zakaria, Ahmad; Mariyanto, Mariyanto
Jurnal Rekayasa Sipil dan Desain 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.v9i2.1801

Abstract

AbstractThis research to find the similarity of the tidal characteristics of sea water, especially in the sea waters in the Meneng station area, where the data used is both hourly tide data from tide data from the website http: //tides.big.go.id and field measured tidal data for a period of 5 years, from 1988 to 1992 at the Meneng tidal station, East Java, Indonesia. The data used in this research have a minimum data length of 720 hours or 30 days, using 9 tidal harmonic components using the least squares method and then converted into the ANFOR program (Zakaria, 2005), this program can produce a periodic tidal data model. including the amplitude value that can be used to see a tidal characteristic of sea water. After the tidal data is modeled and analyzed, the correlation coefficient is generated. From the results of this study, it can be concluded that the component results obtained from the hourly tide data from the website http://tides.big.go.id and field measured data have something in common with the generated tidal components. The average correlation coefficient of the two data is 0.8010 and is included in the very good category. Keywords: tides, ANFOR, correlation coefficient
Studi Kasus Pada Ruas Jalan Kecamatan Batu Ketulis Lampung Barat dengan Menggunakan Analisis Komputasi dan Metode Penanganannya Nawawi, M Lucky Apriansyah; Iswan, I; Zakaria, Ahmad
Jurnal Rekayasa Sipil dan Desain Vol. 9 No. 3 (2021): Edisi September 2021
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v9i3.1871

Abstract

Batu Ketulis is a sub-district located in West Lampung Regency, Lampung province. West Lampung is one of the areas in Lampung that has landslide-prone potential. This study is to determine the value of slope safety factors and calculate the stability of slopes using Bronjong to hold the soil carrying capacity to be safe and not landslide, which is calculated using computational programs with fellenius method, bishop with saturated, partially saturated, and unsaturated groundwater face conditions. The results showed that soil parameters affect the stability of the slope, the condition of fully saturated soil has the lowest value compared to other conditions. From the results of the study obtained the value of the smallest safe factor before handling, namely at location II with an elevation of 20 m and a slope angle of 30° ,35° ,40° of 1,074, 1,023, 1,008 in the condition of fully saturated groundwater face. In the condition of the slope after handling using bronjong obtained a value of 2,462, 2,303, 2,223 for the Fellenius method, while for the Bishop method of 2.12, 2,006, 1.95. Handling using bronjong has a big effect on increasing safe factors so that landslide handling using bronjong is quite stable if applied at the research site.
Analisis Perbandingan Kedalaman Gerusan Lokal (Local Souring) Di Hilir Bangunan Pelimpah (Ogee and Stepped Spillway) Dengan Model Fisik 2D Saputra, Eko Adi; Wahono, Endro Prasetyo; Zakaria, Ahmad
Jurnal Rekayasa Sipil dan Desain Vol. 9 No. 3 (2021): Edisi September 2021
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v9i3.1914

Abstract

AbstrakSpillway atau disebut dengan bangunan pelimpah merupakan bangunan air yang memiliki fungsi untuk mengalirkan debit banjir yang masuk ke dalam waduk. Dalam perencanaan suatu bangunan air diperlukan penelitian terdahulu mengenai masalah penggerusan lokal (Local Scouring) yang terjadi akibat adanya kecepatan air dan turbulensi yang melampaui daya tahan dari dasar saluran pada bagian hilir bangunan. Dari analisis hidrolika penelitian ini menggunakan desain bangunan pelimpah Ogee and Stepped dengan model fisik 2-D dan sedimen yang digunakan adalah pasir dengan diameter seragam yaitu 1,8 mm atau lolos ayakan no. 16. Penelitian ini menunjukkan 5 kali pengamatan pola gerusan lokal di hilir bendung pada setiap percobaan selama 25 menit. Pengamatan gerusan meliputi besarnya debit dan kedalaman gerusan maksimum yang terjadi pada hilir bendung. Pada bangunan pelimpah Ogee Spillway gerusan maksimum (dsmax) terjadi pada ketinggian di hulu (H0) 3 cm sebesar 0,097 m dengan Lds sebesar 0,17 m dari hilir pelimpah. Pada bangunan pelimpah Stepped Spillway gerusan maksimum (dsmax) terjadi pada ketinggian di hulu (H0) 3 cm sebesar 0,125 m dengan Lds sebesar 0,09 m dari hilir pelimpah. Hal ini menunjukkan bahwa semakin besar debit aliran, maka semakin besar kedalaman gerusan yang terjadi.  Kata kunci : Pelimpah Ogee and Stepped Spillway, Gerusan Lokal, Sedimen.
The effect of El Nino and La nina on the rain data of Lampung Barat Regency, Lampung Province Hartantio, Fajar; Zakaria, Ahmad; Kusumastuti, Dyah
Jurnal Rekayasa Sipil dan Desain Vol. 9 No. 3 (2021): Edisi September 2021
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v9i3.1926

Abstract

The purpose of this research to analyze and determine dominant impact area due to the effect of El Nino and La Nina on 6 rainfall station in west Lampung Regency, Lampung Province. This study also compred between Fast Fourier Transform (FFT) methods, and Lomb Periodogram methods. This study using rainfall data from 1998 to 2019 taken from Balai Besar Wilayah Sungai Mesuji – Sekampung (BBWSMS). According on comparison result, it is known that both methods indicate that Air Hitam Rainfall Station experience the effect of El Nino and La Nina more dominantly than the others, with the looping period of 3,9165 years from Lomb Periodogram method and 3,7381 years from (FFT) Method. It is also known that Lomb Periodogram Method has a better accuracy than (FFT) method. This is because Lomb Periodogram can read the length of data more accurately than Fast Fourier Transform (FFT) method.  Keywords: El Nino, La Nina, rain station, rainfall, Fast Fourier Transform, Lomb Periodogram
Perbandingan Analisis Data Curah Hujan yang Hilang di Daerah Lampung Barat dengan Menggunakan Metode Normal Ratio, Rata-Rata Aljabar, Inversed Square Distance, dan Modified Method Gultom, Winda Maria Rebecca; Zakaria, Ahmad; Kusumastuti, Dyah Indriana
Jurnal Rekayasa Sipil dan Desain Vol. 9 No. 3 (2021): Edisi September 2021
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v9i3.1927

Abstract

Curah hujan merupakan data yang sangat penting untuk memprediksi kondisi suatu daerah sebagai awal dari perencanaan pembangunan. Namun ada kalanya alat pencatat hujan pada stasiun tertentu rusak sehingga data hujan tidak tercatat atau disebut hilang. Dalam penelitian ini, saya mencoba menganalisis data curah hujan di lampung barat dengan menggunakan metode rata-rata aljabar, normal ratio, inversed square distance, serta metode modifikasi. Setelah saya teliti ternyata didapatkan bahwa metode modifikasi inversed square distance yang saya buat mendapatkan hasil yang paling baik. Nilai korelasi metode tersebut termasuk dalam kategori cukup baik. Kata kunci : Data Hujan Hilang, Curah Hujan, Lampung Barat, Metode Rata-Rata Aljabar, Metode Normal Ratio, Metode Inversed Square Distance, Metode Modifikasi
Analisis Data Curah Hujan yang Hilang dengan Menggunakan Metode Normal Ratio, Inversed Square Distance, Rata - Rata Aljabar dan Metode Modifikasi Prasetio, Rizki Lazuardi; Zakaria, Ahmad; Ashruri, Ashruri; Sumiharni, Sumiharni
Jurnal Rekayasa Sipil dan Desain Vol. 9 No. 3 (2021): Edisi September 2021
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v9i3.1992

Abstract

Penelitian ini dilakukan dengan tujuan untuk menghitung korelasi data curah hujan terukur dengan data curah hujan hasil perhitungan dengan masing-masing metode menggunakan lima stasiun.Dari hasil penilitian menggunakan metode Rata-Rata Aljabar, metode Normal Ratio, metode Inversed Square Distance dan metode Modifikasi dengan data hujan harian satu tahun, data hujan kumulatif bulanan, maupun data hujan rata-rata bulanan, dapat diambil kesimpulan semakin banyak jumlah stasiun maka semakin baik nilai korelasinya. Nilai korelasi dengan data hujan kumulatif bulanan sertadata hujan rata-rata bulanan menggunakan beberapa jumlah stasiun yang berbeda setiap masing - masing metode tidak ada perbedaan yang signifikan dengan nilai rata-rata korelasi persentase perbedaannya 0,049% sampai dengan 0,059%.
Simulasi Tampungan Bendungan Sukamahi, Kecamatan Megamendung Kabupaten Bogor Kurniasih, Ayu; Wahono, Endro P; Zakaria, Ahmad; Purwadi, Opik Taufik
Jurnal Rekayasa Sipil dan Desain Vol. 9 No. 3 (2021): Edisi September 2021
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v9i3.1994

Abstract

Banjir yang sering terjadi di wilayah Jakarta dan sekitarnya yang hampir terjadi setiap tahunnya atau setiap musim penghujan datang menimbulkan kerugian harta benda, selain itu juga menggangu kegiatan perekonomian. Salah satu upaya untuk mengurangi pengaruh kerugian yang disebabkan oleh banjir di kota Jakarta tersebut yaitu membangun 2 (dua) buah bendungan di Daerah Aliran Sungai Ciliwung yang terletak di hulu sungai yang berada di Kabupaten Bogor, yaitu Bendungan Sukamahi yang berfungsi sebagai pengendalian banjir sungai ciliwung oleh sebab itu dilakukan simulasi tampungan menggunakan program HEC-HMS 4.5.Penelitian ini dibutuhkan beberapa analisis antara lain meliputi hujan harian maksimum, curah hujan rancangan, hujan efektif, hidrograf satuan banjir rancangan, dan simulasi tampungan menggunakan program HEC-HMS 4.5.Berdasarkan penelitian ini menunjjukan bahwa curah hujan yang mungkin terjadi (PMP) mrncapai 571,7967 mm, debit banjir 2, 5, 10, 20, dan 50 tahun mencapai 56,6853 m3/det, 72,8729 m3/det, 84,1311 m3/det, 110,5354 m3/det. Selain debit banjir, dalam penelitian ini berdasarkan terowongan tertutup didapat kapasitas pelimpah dan volume tampungan dalam kala ulang 50 tahun yaitu didapat tinggi muka air maksimum yaitu 597,4 m, dengan kelebihan 0,65 m diatas spillway dengan volume sebesar 969400 m3.Kata kunci : HEC-HMS, Bendungan, PMP, Simulasi Tampungan.
Co-Authors Abyuliani, Alza adama, riri arinda Afifah, Mar'atul Afriami, Lusmeilia Agustriyanto, Dono Ahmad Herison Ahmad Tusi Ahsan, Fathan Naufal Aji Saputra, Aji Aji, Badruzzaman Al Rasyid, Burhan Najib Amanda, Tiara Maelta Amidi Amidi, Amidi Andika, Ivana Aprili Andriansyah, Yeddy Angelina Angelina Anggraini , Melisa anggraini, yeshe Angin, Geleng Perangin Arfanda, Poppy Elisano Arie Pratama Putra Arief, Farah Diba Arifaini , Nur Armijon . Ashruri Ashruri, Ashruri Asrorudin, Udin Atika Sari Atmoko, Fajar Destri Aynuddin, . Aynuddin, Aynuddin Ayu Kurniasih, Ayu Ayuningsih, Titik Cahyo, Febriansyah Dwi Cesar, Irvan Tegar Chairil Anwar Citra Dewi Damayanti, Amelia Nurul Dian Pratiwi Didik Didik Dinaryoko, Arif Diwantari, Windy Putri Djanis, Ratnawati L. Djanis, Ratnawati Lilasari Djasmasari, Wittri Dwi Arnanda Putra, Novindio Dwi Joko Winarno Dyah Indriana K Dyah Indriana Kusumastuti Efendi, Muhamad Masjun Elvida, Maharani Endang Sri Lestari Endro Prasetyo Wahono Fachrurrazie, . Fachrurrazie, Fachrurrazie Fadela, Dian Mira Fathony, Awal Rifan Fatoni, Fatoni Fatria, Akhmad Ridho Fikri, Modh. Haikal Finanda, Reysa Fitria, Mizha Nur Gani, Rama Dian Gatot Eko Susilo Gultom, Winda Maria Rebecca Habib Algifari Handayani, Agustia Hartantio, Fajar Hartoto, Dwi Nanda Putra Hayat, Mohammad Haz, Arzuu Abnu Haziman, Muhammad Luthfan Herawati Herawati Ians Aprilo Ichsani, Muhammad Desyan Idharmahadi Adha Imran, Fadli Indarto, Asyidika Vito Indriana K, Dyah Irvani, Asep Irvan Iswan Iswan Iswan, I Jamaludin HN, . Jauhari Arifin Jerfikanasa Murda, Gung Bagus Joko, Dwi karami, muhammad Karim, Achmad Kholiq, Muhammad Nur Kristianto Usman kuncoro, wahyu hadi Kurniawan, Deri Rahli Kurniawan, Panca Kurniawan, Rizqi Kurniyawan, Ikhfan Kusanti, Nency Dwi Kusumaningsih, Dian Kusumastuti, Dyah Kusumastuti, Dyah I. kuswadi, didit kuswadi Laksmana, M. Bima Lepiana, Tenti Lukitawati, Annika Lusmeilia Afriani M Imran Hasanuddin M Rizky Ismail M. Said Zainuddin Manurung, Lodewick Mapiliandari, Inda Mappaompo, M. Adam Mariyanto Mariyanto Marlina, Indah MMSI Irfan ,S. Kom Muhammad Fadli Murdiagatma, Sefrinta Sasma Nawawi, M Lucky Apriansyah Niken, Chatarina Ningtyas, Widya Nurcahya Novianti, Tika Christy Nugraha , Billy Nugraheni, Melly Nur Arifaini Nurdiani Nurdiani, Nurdiani Nurdiani, . Ofik Taufik P, Ofik Ofik Taufik Purwadi, Ofik Taufik Oktiani, Asri Pelawi, Rinaldi Peranginangin, Imanuel PERMADI, I GUSTI AGUNG DIDIT EKA Persada, Citra Phohan, Phohan Pradipta, Adya Rizky Prasetio, Rizki Lazuardi Pratama, Muhammad Vareza Pratiwi, Ayu Ning Trias Purna, Bagus Mustofa Purwadi , Ofik Taupik Purwadi, Ofik Purwadi, Ofik Taupik Purwadi, Opik Taufik Qur'ani, Mutiara Nurul Rachmanda, Farhan Rachmi, Silvia Rachmy, Silvia Rahayu Sulistyorini Randy Setiawan, Randy Razak, Risdha Sagita Restika Putri Retno Farhana Nurulita Rina Indriani Rinaldi, M. Fahmi Romdani, Yuda Romi Fadly Rosalina Rosalina Rosalina, . Saputra, Datra Peta Saputra, Eko Adi Saputra, Fajar Ilham Saputro, Rifki Ananda Sari, Okta Mulya Sasongko, Respati Anton Sauri, Sopian Septiansari, Annisa Putri Dwi Setia, Vika Setyanugraha, Tegar Sitanaya, Brigitha Cindy Siti Nurdianti Muhajir Siti Nurul Khotimah Slamet Riyadi Styani, Erna Subuh Tugiono, Subuh Suharni Suharni Sumarno, Ari Pitoyo Sumiharni Sumiharni Syah, Aminudin Syahruli, Firman Tambunan, Jenny Anna Margaretha Taufik P, Ofik Tomi, Muhammad Tridawati, Anggun Trisdiana, Fitri Trisnar Adi Prabowo Tuhu Pangestu, Ibnu Usman, Arifuddin W, Endro W, Endro Prasetyo Wahono, Endro Wahono, Endro Praseyto Wardhani, Puspita Sri Ayu widarsono, eko Widya Anggraeni, Widya Wijaya, Riki Chandra Winarno, Dwijoko Yacub, Vanita Kesumawati Yanti, Cristi Yuda Romdania yulianto, alim Yusma Sari, Nia Hana Zainuddin, M Said