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All Journal ILMU KELAUTAN: Indonesian Journal of Marine Sciences Majalah Geografi Indonesia Jurnal Pengabdian Kepada Masyarakat Sakai Sambayan Jurnal Ketahanan Nasional JURNAL ILMIAH PENDIDIKAN FISIKA AL BIRUNI Eksplorium : Buletin Pusat Pengembangan Bahan Galian Nuklir Jurnal Pertanian Terpadu Jurnal Perikanan Universitas Gadjah Mada Jurnal Riset Akuakultur Jurnal Iktiologi Indonesia (Indonesian Journal of Ichthyology) Aquacultura Indonesiana Journal of Engineering and Scientific Research (JESR) Prosiding Seminar Teknologi Kebumian dan Kelautan (SEMITAN Jurnal Penelitian Geografi (JPG) Depik Jurnal Ilmu-Ilmu Perairan, Pesisir dan Perikanan Depik Jurnal Ilmu-Ilmu Perairan, Pesisir, dan Perikanan
Rustadi Rustadi
Department Of Fisheries, Faculty Of Agriculture, Universitas Gadjah Mada
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Medicine & Pharmacology Physics Social Sciences Other

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Pengaruh Padat Tebar dan Penggunaan Injektor Venturi terhadap Laju Pertumbuhan Udang (Litopenaeus Vannamei) dalam Bak Beton Romi Novriadi; Khoirun Nisa Alfitri; Supriyanto Supriyanto; Rudy Kurniawan; Deendarlianto Deendarlianto; Rustadi Rustadi; Wiratni Wiratni; Sinung Rahardjo
Jurnal Perikanan Universitas Gadjah Mada Vol 22, No 2 (2020)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jfs.60516

Abstract

Tujuan dari penelitian ini adalah untuk melakukan evaluasi terhadap efek dari perlakuan padat tebar yang berbeda dan penggunaan injektor venture terhadap laju pertumbuhan udang Litopenaeus vannamei yang dipelihara di bak beton. Udang Vannamei (berat awal 0,3 ± 0,07 g) dimasukkan ke dalam 32 bak pemeliharaan dengan ukuran 8x8x1 m dengan padat tebar 300, 400, 500, 600 udang m-2 dan masing-masing padat tebar memiliki delapan pengulangan. Untuk pengamatan injektor venturi, dilakukan di dua kepadatan berbeda yakni 300 dan 600 udang m-2 dengan memasang injektor venturi masing-masing di tiga bak pengamatan dan dibandingkan dengan kontrol. Jumlah pakan yang diberikan ditentukan terlebih dahulu berdasarkan asumsi pertambahan berat udang Vannamei 1 g per minggu, rasio konversi pakan (FCR) 1,4 dan kematian mingguan sebanyak 3 %. Hasil pengamatan menunjukkan bahwa terdapat korelasi negatif antara peningkatan padat tebar dengan laju pertumbuhan udang. Berat akhir udang berada di kisaran 13,0±0,2, 11,6±0,5, 10,3±0,4 dan 9,3±1,0 g untuk padat tebar 300, 400, 500, dan 600 udang m-2. Laju pertambahan berat harian berada di kisaran 0,14±0,02 – 0,17±0,02 g dan semakin membaik ketika pada tebar diturunkan (P<0,05). Sementara, tidak ada perbedaan yang nyata untuk parameter FCR dan tingkat kelulushidupan udang (P<0,05). Injektor venturi dapat meningkatkan produktivitas produksi sebesar 6,63±0,094% untuk kepadatan 600 udang m-2 dan 7,97±0,054% untuk kepadatan 300 udang m-2 dibandingkan bak kontrol. Selama masa produksi, tidak ada pengaruh nyata untuk penggunaan empat padat tebar berbeda terhadap kondisi kualitas air media pemeliharaan dan tidak ada insiden munculnya wabah penyakit.
Peta batimetri Danau Sentani Papua Ervina Indrayani; Kamiso Handoyo Nitimulyo; Suwarno Hadisusanto; Rustadi .
Depik Vol 4, No 3 (2015): DECEMBER 2015
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (399.297 KB) | DOI: 10.13170/depik.4.3.2723

Abstract

Abstract. Lake Sentani is located in Jayapura Regency, Papua Province with an area 9,360 ha and 70-90 meters above sea level. The lake directly adjacent to Cycloops Mountains Nature Reserve, obtaining supplies of about 34 springs.  The aim of the research was to describes the lake bathymetry as a basic information for the utilization. The function are as habitat place for many species, water resources, fisheries, transport and tourism. Morphometry and bathymetry of the lake is very important for the sustainable management of the lake functions as a topography and relief lakes that have different extreme depths. Making the bathymetry of the lake is done with the acoustic method. Recording data using Garmin GPSmap 76CSx and Garmin Echo 100 Fishfinder. The result of the research showed that the depth of Lake Sentani with 9 variation at the different location, in generally range 15-23 m. Meanwhile, the waters of the deepest lake located in the eastern part of the lake is more than 70 m and the lowest depths of 0-7 m are in the middle of the Sentani area.Keywords: bathymetry; morphometry; acoustic method; Garmin Echo 100 Fishfinder; Lake SentaniAbstrak. Danau Sentani terletak di Kabupaten Jayapura, Provinsi Papua dengan luas 9.360 ha dan ketinggian   70–90 m dpl. Danau ini berbatasan langsung dengan Cagar Alam Pegunungan Cycloops dan memperoleh suplai dari sekitar 34 sumber mata air. Tujuan penelitian ini adalah menggambarkan batimetri danau sebagai informasi dasar pemanfaatan danau. Fungsi danau adalah sebagai habitat makhluk hidup, sumber air masyarakat sekitar, perikanan, transportasi dan pariwisata. Mengetahui morfometri dan batimetri danau sangat penting untuk pengelolaan fungsi danau yang berkelanjutan karena kondisi topografi dan relief danau yang memiliki perbedaan kedalaman ekstrim. Pembuatan batimetri danau dilakukan dengan metode akustik. Perekaman data menggunakan Garmin GPSmap 76CSx dan Garmin Echo 100 Fishfinder. Hasil penelitian menunjukkan bahwa kedalaman perairan Danau Sentani terdiri dari 9 variasi yang umumnya berkisar 15–23 m. Perairan danau terdalam berada di wilayah timur danau yaitu lebih dari 70 m dan kedalaman terendah antara 0–7 m berada di wilayah Sentani tengah.Kata kunci: batimetri; morfometri; metode akustik; Garmin Echo 100 Fishfinder; Danau Sentani
Peta batimetri Danau Sentani Papua Ervina Indrayani; Kamiso Handoyo Nitimulyo; Suwarno Hadisusanto; Rustadi .
Depik Vol 4, No 3 (2015): DECEMBER 2015
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.4.3.2723

Abstract

Abstract. Lake Sentani is located in Jayapura Regency, Papua Province with an area 9,360 ha and 70-90 meters above sea level. The lake directly adjacent to Cycloops Mountains Nature Reserve, obtaining supplies of about 34 springs.  The aim of the research was to describes the lake bathymetry as a basic information for the utilization. The function are as habitat place for many species, water resources, fisheries, transport and tourism. Morphometry and bathymetry of the lake is very important for the sustainable management of the lake functions as a topography and relief lakes that have different extreme depths. Making the bathymetry of the lake is done with the acoustic method. Recording data using Garmin GPSmap 76CSx and Garmin Echo 100 Fishfinder. The result of the research showed that the depth of Lake Sentani with 9 variation at the different location, in generally range 15-23 m. Meanwhile, the waters of the deepest lake located in the eastern part of the lake is more than 70 m and the lowest depths of 0-7 m are in the middle of the Sentani area.Keywords: bathymetry; morphometry; acoustic method; Garmin Echo 100 Fishfinder; Lake SentaniAbstrak. Danau Sentani terletak di Kabupaten Jayapura, Provinsi Papua dengan luas 9.360 ha dan ketinggian   70–90 m dpl. Danau ini berbatasan langsung dengan Cagar Alam Pegunungan Cycloops dan memperoleh suplai dari sekitar 34 sumber mata air. Tujuan penelitian ini adalah menggambarkan batimetri danau sebagai informasi dasar pemanfaatan danau. Fungsi danau adalah sebagai habitat makhluk hidup, sumber air masyarakat sekitar, perikanan, transportasi dan pariwisata. Mengetahui morfometri dan batimetri danau sangat penting untuk pengelolaan fungsi danau yang berkelanjutan karena kondisi topografi dan relief danau yang memiliki perbedaan kedalaman ekstrim. Pembuatan batimetri danau dilakukan dengan metode akustik. Perekaman data menggunakan Garmin GPSmap 76CSx dan Garmin Echo 100 Fishfinder. Hasil penelitian menunjukkan bahwa kedalaman perairan Danau Sentani terdiri dari 9 variasi yang umumnya berkisar 15–23 m. Perairan danau terdalam berada di wilayah timur danau yaitu lebih dari 70 m dan kedalaman terendah antara 0–7 m berada di wilayah Sentani tengah.Kata kunci: batimetri; morfometri; metode akustik; Garmin Echo 100 Fishfinder; Danau Sentani
Peta batimetri Danau Sentani Papua Ervina Indrayani; Kamiso Handoyo Nitimulyo; Suwarno Hadisusanto; Rustadi .
Depik Vol 4, No 3 (2015): DECEMBER 2015
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.4.3.2723

Abstract

Abstract. Lake Sentani is located in Jayapura Regency, Papua Province with an area 9,360 ha and 70-90 meters above sea level. The lake directly adjacent to Cycloops Mountains Nature Reserve, obtaining supplies of about 34 springs.  The aim of the research was to describes the lake bathymetry as a basic information for the utilization. The function are as habitat place for many species, water resources, fisheries, transport and tourism. Morphometry and bathymetry of the lake is very important for the sustainable management of the lake functions as a topography and relief lakes that have different extreme depths. Making the bathymetry of the lake is done with the acoustic method. Recording data using Garmin GPSmap 76CSx and Garmin Echo 100 Fishfinder. The result of the research showed that the depth of Lake Sentani with 9 variation at the different location, in generally range 15-23 m. Meanwhile, the waters of the deepest lake located in the eastern part of the lake is more than 70 m and the lowest depths of 0-7 m are in the middle of the Sentani area.Keywords: bathymetry; morphometry; acoustic method; Garmin Echo 100 Fishfinder; Lake SentaniAbstrak. Danau Sentani terletak di Kabupaten Jayapura, Provinsi Papua dengan luas 9.360 ha dan ketinggian   70–90 m dpl. Danau ini berbatasan langsung dengan Cagar Alam Pegunungan Cycloops dan memperoleh suplai dari sekitar 34 sumber mata air. Tujuan penelitian ini adalah menggambarkan batimetri danau sebagai informasi dasar pemanfaatan danau. Fungsi danau adalah sebagai habitat makhluk hidup, sumber air masyarakat sekitar, perikanan, transportasi dan pariwisata. Mengetahui morfometri dan batimetri danau sangat penting untuk pengelolaan fungsi danau yang berkelanjutan karena kondisi topografi dan relief danau yang memiliki perbedaan kedalaman ekstrim. Pembuatan batimetri danau dilakukan dengan metode akustik. Perekaman data menggunakan Garmin GPSmap 76CSx dan Garmin Echo 100 Fishfinder. Hasil penelitian menunjukkan bahwa kedalaman perairan Danau Sentani terdiri dari 9 variasi yang umumnya berkisar 15–23 m. Perairan danau terdalam berada di wilayah timur danau yaitu lebih dari 70 m dan kedalaman terendah antara 0–7 m berada di wilayah Sentani tengah.Kata kunci: batimetri; morfometri; metode akustik; Garmin Echo 100 Fishfinder; Danau Sentani
Geological Structure Identification Using GGMplus Satellite Gravity Data in The Area Surrounding Mount Tampomas Mazzaluna, Haidar Prida; Rustadi, Rustadi; Wibowo, Rahmat Catur
EKSPLORIUM Vol 45, No 1 (2024): May 2024
Publisher : Badan Riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/eksplorium.2024.6924

Abstract

Satellite gravity provides a new alternative in geological exploration with several advantages, such as low operational cost and large covering area. GGMplus satellite gravity data provide better accuracy for several applications such as lithology or fault identification. Satellite gravity provides a new alternative in geological exploration with several advantages, such as lower costs, broader area coverage, and easily accessible data. Mount Tampomas is one of the areas that has geothermal prospects and a mountain area that has many types of rock formations and faults. This research has been conducted using GGMplus satellite gravity data in the Mount Tampomas area to obtain the second vertical derivative (SVD) and identify the fault distribution in the area. The GGMplus Gravity Acceleration data was corrected and filtered to obtain SVD structures in the area. The structure in this area is dominantly trending northwest-southeast and west-east. The area around Mount Tampomas forms a structure in the form of a caldera. In addition, there are also structures trending north-south at coordinates 81500-82000 E. Some of these structures were overlaid with a geological map to see the suitability of the processed data with the geological conditions that have been studied. The comparison is done by overlaying the structure of the interpretation results and the contour of the value 0 from the Second Vertical Derivative (SVD) data so that we get four fault structures that correlate with the geological map, three calderas, and one lineament that correlates with the lineament map.
Earthquake Disaster Mitigation Mapping By Modeling of Land Layer and Site Effect Zone in The Kota Baru of South Lampung Haerudin, Nandi; Rustadi, Rustadi; Fitriawan, Helmy; Siska, Deassy; Farid, Muchammad
Jurnal Ilmiah Pendidikan Fisika Al-Biruni Vol 8 No 1 (2019): Jurnal Ilmiah pendidikan Fisika Al-Biruni
Publisher : Universitas Islam Negeri Raden Intan Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/jipfalbiruni.v8i1.3705

Abstract

Kota Baru is the satellite city of Bandar Lampung. The city is prepared for the expansion of the city of Bandar Lampung. Zonation map of earthquake risk is required for Kota Baru due to its location within the reach of earthquake energy of Semangko subduction fault. In this study, we model the earthquake-prone zone map based on the soil characteristics (site effect) combined with the underground layer model to get a detailed description of the horizontal and vertical soil character. The microtremor method is performed to obtain the zonation effect mapping. Whereas, the ground layer modeling is obtained using the geoelectrical method. The modeling results show that the study area is far from tectonic activity based on the history of past earthquake events. However, this area has a large sediment thickness and has a low dominant frequency value, so it is an area that is vulnerable to earthquakes.
Estimating Bedrock Depth Based on Total Magnetic Field Anomaly Data in Medan City Area in the Northern Sumatra Basin Using the Peter Half Slope Method Rasimeng, Syamsurijal; Sianturi, Rizky J.; Surbakti, Lucky Dolinta; Kurniawan, Yoga; Dani, Ilham; Rustadi, Rustadi
Jurnal Ilmiah Pendidikan Fisika Al-Biruni Vol 13 No 1 (2024): Jurnal Ilmiah Pendidikan Fisika Al-Biruni
Publisher : Universitas Islam Negeri Raden Intan Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/jipfalbiruni.v13i1.18555

Abstract

The Peter Half Slope method is valuable for estimating rock depths using total magnetic field anomaly data. It relies on graphical analysis and practical rules to gauge the depths of magnetic sources. This method finds significant utility in magnetic interpretation, measuring half the maximum slope distance on magnetic anomaly curves. The primary objective of this research is to determine anomaly depths within Medan City by applying the Peter Half Slope method. The study employs total magnetic field anomaly data from the Medan city area, a part of the Northern Sumatra Basin. The research methodology includes data preparation, reduction to the pole transformation, profile creation, maximum slope computation, half-slope determination, and identifying tangent points on both minimum and maximum curves. The difference between these tangent points is then calculated to derive the depth of the bedrock. Based on the depth calculations using criteria for very thin, intermediate thickness, and very thick bodies, depths of 401, 301, and 240 meters were obtained, resulting in an average depth of 314 meters. This method plays a pivotal role in characterizing subsurface rock structures and is essential for geophysical analysis and magnetic data interpretation.
Uji Aerasi Microbubble dalam Menentukan Kualitas Air, Nilai Nutrition Value Coefficient (NVC), Faktor Kondisi (K) dan Performa pada Budidaya Nila Merah (Oreocrhomis Sp.) Heriyati, Eny; Rustadi, Rustadi; Isnansetyo, alim; Triyatmo, Bambang
Jurnal Pertanian Terpadu Vol 8 No 1 (2020): Jurnal Pertanian Terpadu Jilid VIII Nomor 1 Juni 2020
Publisher : Sekolah Tinggi Pertanian Kutai Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36084/jpt..v8i1.232

Abstract

Penelitian ini betujuan untuk menguji penggunaan aerasi microbubble pada parameter kualitas air, performa, nilai NVC dan factor kondisi perairan. Ikan berukuran 12±3 g, sebanyak 50 ekor dipelihara selama 3 bulan dengan perlakuan aerasi micobubble, aerasi konvensional dan non aerasi dalam system resirkulasi. Parameter yang dianalisa dalam penelitian ini menunjukkan nilai DO aerasi microbubble lebih tinggi dan tetap bertahan lama sampai akhir penelitian dibandingkan aerasi konvensional dan control (p<0,05), demikian juga dengan suhu air. Parameter kualitas air lainnya tidak dipengaruhi oleh perlakuan aerasi, dan masih menunjukkan nilai yang normal untuk budidaya nila, kecuali ammonia pada semua perlakuan menunjukkan nilai yang melebihi standar SNI. Pengaruh stabilnya nilai DO yang dihasilkan oleh aerasi microbubble berpengaruh pada performa nila, yang mampu meningkatkan ukuran bobot ikan tiap ekor dan meningkatkan biomasa ikan 268 % dari kontrol dan 32,5 % lebih tinggi aerasi konvensional. Dalam penelitian ini nilai factor kondisi dan NVC dari semua perlakuan menunjukkan nilai yang relative sama. Kesimpulan dari penelitian ini adalah, meskipun nilai kondisi dan NVC tidak dipengaruhi perlakuan aerasi, namun aerasi microbubble mampu meningkatkan DO, pertumbuhan dan biomasa ikan.
Aplikasi Electrical Resistivity Tomography (ERT) untuk Sistem Grounding: Studi Kasus di Pesisir Bandar Lampung Rustadi, Rustadi
Jurnal Penelitian Geografi (JPG) Vol 11, No 2 (2023): Jurnal Penelitian Geografi (JPG)
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jpg.v11i2.28509

Abstract

Electrical resistivity tomography telah digunakan untuk membantu memetakan zona konduktif sebagai tapak penempatan electrode penangkal petir di Pesisir Bandar Lampung. Terdapat tiga lintasan ERT menggunakan konfigurasi Wenner-Schlumberger, panjang lintasan 200 m dan spasi antar electrode 6 m. Profil bawah permukaan memperlihatkan kemiripan tersusun oleh dua lapisan. Llapisan konduktif dengan kedalaman 0 – 15 m, menutup lapisan resistif di bawahnya. Zona konduktif dengan resistivitas < 7  Ω-m berupa lensa-lensa sebagai air tanah dangkal yang terpapar oleh air laut. Pengayaan unsur khususnya Na, Cl, dan Mg, telah menjadikan air tanah dangkal berperan sebagai konduktor dan memenuhi spesifikasi untuk penempatan electrode system penangkal petir. Kata kunci: ERT; grounding; pesisir bandar lampung DOI: http://dx.doi.org/10.23960/jpg.v11.i2.28509
Volume Estimation Using Resistivity Tomography Method In Bakauheni, South Lampung Ependy, Julpan; Rustadi, Rustadi; Wibowo, Rahmat Catur
Journal of Engineering and Scientific Research Vol. 7 No. 1 (2025)
Publisher : Faculty of Engineering, Universitas Lampung Jl. Soemantri Brojonegoro No.1 Bandar Lampung, Indonesia 35141

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jesr.v7i1.206

Abstract

Lampung is an area that has various natural resources, one of which is andesite rock. National economic growth and incessant infrastructure development have resulted in an increased need for building materials, including Andesite. Andesite rocks are widely used for the formation of building foundations, making bridges, and paving roads. In this study, the volume of andesite rocks was calculated using the resistivity tomography method in the Bakauheni area of South Lampung in Pegantungan, Bakauheni District, South Lampung Regency, Lampung Province. which consists of 5 lines with a spacing between electrodes of 5 meters, with a span length of about 315 meters. The apparent resistivity data obtained are processed into a two-dimensional model through linear inversion using RES2DINV software. The two-dimensional model was then interpolated using the Rockworks 15 tool to become a three-dimensional model. Based on the 2D cross-section model, the high resistivity values varied. identified as andesite rock, which is imaged in red to purple colour, and volumetric andesite rock based on 3D interpolation for an area of ± 15.20 Ha is 3,411,066.876 m3.
Co-Authors Ahmad Z., Ahmad Z. Alim Isnansetyo Alim Isnansetyo ALIM ISNANSETYO Arief I. H, Arief I. H Arki Y. Arsono Bagus Wasito Bambang Triyatmo Dani, Ilham Darmawan, I Gede Boy Dea Nafila Deassy Siska Deendarlianto Dindin Suryadin Dini W.K. Sari Djumanto Djumanto Dwijo Priyanto Eny Heriyati Eny Heriyati, Eny Ependy, Julpan Ervia Yudiati Ervina Indrayani Estu Nugroho Fanny Iriany Ginzel Farid, Muchammad Helmy Fitriawan Hery Saksono Hery Sulistyo Ign. Hardaningsih Ign. Hardaningsih INDAH ISTIQOMAH Jelita Rahma Hidayati KAMISO HANDOYO NITIMULYO Kamiso Handoyo Nitimulyo Karyanto, Karyanto Khoirun Nisa Alfitri Mazzaluna, Haidar Prida Mila Safitri Rizfa Muhammad Salauddin Ramadhan Djarod Nandi Haerudin Nuril Azhar Nurul Khakhim Rabia Alghazeer Riski Tanjung Romi Novriadi Rudy Kurniawan S.Pd. M Kes I Ketut Sudiana . Senny Helmiati Septriani, Nur Indah Shima Bhaskara Ayuningrum Sianturi, Rizky J. Sinung Rahardjo Sitty Ainsyah Habibie Suadi Suadi Suadi Suadi Sunaryo Sunaryo Supriyanto Supriyanto Surbakti, Lucky Dolinta Susila Susila SUWARNO HADISUSANTO Syamsurijal Rasimeng Ustadi Ustadi Wibowo, Rahmat Catur Wiratni Budhijanto Wiratni Wiratni Yoga Kurniawan Zulprizal Zulprizal