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All Journal Jurnal Pembangunan Wilayah dan Kota BERKALA FISIKA SAINS DAN MATEMATIKA YOUNGSTER PHYSICS JOURNAL Jurnal Sains dan Teknologi ECSOFiM (Economic and Social of Fisheries and Marine Journal) Jurnal Kelautan Tropis AGRIKAN Jurnal Ilmiah Agribisnis dan Perikanan Jurnal Penelitian Pendidikan IPA (JPPIPA) INDONESIAN JOURNAL OF APPLIED PHYSICS Albacore : Jurnal Penelitian Perikanan Laut Jurnal Perikanan Universitas Gadjah Mada Jurnal Akuatiklestari Journal of Physics and Its Applications Jurnal Kebijakan Perikanan Indonesia Buletin Ilmiah Marina : Sosial Ekonomi Kelautan dan Perikanan Habitus Aquatica : Journal of Aquatic Resources and Fisheries Management Jurnal Energi Baru dan Terbarukan Eksergi: Jurnal Teknik Energi Agrikan: Jurnal Agribisnis Perikanan Policy Brief Pertanian, Kelautan, dan Biosains Tropika Lempuk: Jurnal Ilmu Kelautan dan Perikanan

Gatot Yulianto

Departemen Fisika, Fakultas Sains Dan Matematika, Universitas Diponegoro

Author-ID : 424861

Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Other

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Analisis resiko kebencanaan gempa bumi data mikrotremor di Desa Fulolo Kecamatan Alasa Kabupaten Nias Utara Asronj Bakkit Simanjuntak; Gatot Yuliyanto; Udi Harmoko
Youngster Physics Journal Vol 6, No 4 (2017): Youngster Physics Journal Oktober 2017
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (740.446 KB)

The Measurement of the microtremor has been conducted in the Village of Fulolo, Alasa Subdistrict, North Nias District. The aim of this study is to determine the parameters of HVSR in the form of the dominant frequency value (f0) and amplification factor (A0) and the parameters of soft sediment thickness (H), seismik vulnerability index (Kg), peak ground acceleration/PGA (α) and ground shear strain (γ) as well as analyzing the earth quake disaster risk in the Village of Fulolo, Alasa District, North Nias District. Microtremor measurements done on 5 points measurement and microtremor’s data were analyzed using Horizontal to Vertical Spectral Ratio’s method. The HVSR analysis is in the dominant frequency (f0) value and amplification (A0) value. Then calculate the thickness of soft sedimentary , the value of peak ground acceleration/PGA(α), the value of seismic vulnerability index (Kg) and the value of ground shear strain (γ).The results showed that the village of Fulolo have dominant frequency (f0) distribution grade range up 0,954 Hz to 7,149 Hz, the value of amplification (A0) ranges up 0,546 to 7,505, the value of the thickness of soft sedimentary (H) ranges up 8,945 meters t 112,21 meters, the value of peak ground acceleration (α) ranges up 71,78 gal to 194,11 gal, the seismic vulnerability index (Kg) ranges up 2,06 x 10-07 (1/cm s2) to 1,86 x 10-05 (1/cm s2) and the value of ground shear strain (γ) range up 1,031 x 10-04 to 1,338 x 10-03. Area that are high risk of experiencing the ravages of earthquakes are Fulolo 3rd, Fulolo 4th, Fulolo 5th on the Gunung Sitoli Formations (QTg) because of those have a thick layer of soft sediments so that third of the area have a dominant low frequency (f0) and resulting low amplification factor (A0) are high as well as at risk for experiencing shifting rock and deformation of surface layer due to the propagation of earthquake waves.Keywords: Microtremor, HVSR, Dominant Frequency, Amplification, Peak Ground Acceleration, Seismic Vulnerability Index and Ground Shear Strain

Analisa Mikrotremor Menggunakan Metode HVSR untuk Mengetahui Karakteristik Bawah Permukaan Manifestasi Panas Bumi Diwak dan Derekan Berdasarkan Nilai Vp Vithya Arintalofa; Gatot Yulianto; Udi Harmoko
Jurnal Energi Baru dan Terbarukan Vol 1, No 2 (2020): Juli 2020
Publisher : Program Studi Magister Energi, Sekolah Pascasarjana, Universitas Diponegoro, Indonesia

Pengukuran Mikrotremor merupakan pengukuran seismik pasif untuk merekam getaran yang dihasilkan oleh aktivitas bumi ataupun aktivitas manusia, biasanya metode ini digunakan untuk memperkirakan tingkat kerusakan yang timbul akibat gempa bumi dan juga dapat digunakan untuk mengetahui kondisi struktur bawah permukaan berdasarkan frekuensi dominannya dan faktor amplifikasinya. Dalam analisis mikrotremor spektrum komponen horizontal dibandingkan terhadap komponen vertikal atau dikenal dengan metode HVSR. Parameter penting yang dihasilkan dari metode HVSR yaitu frekuensi natural dan amplifikasi. Dari hasil penelitian didapatkan P=persebaran nilai frekuensi dominan (fo) yang didapatkan dari hasil pengolahan data mikrotremor pada area manifestasi panas bumi Diwak dan Derekan berkisar antara 0,08 Hz sampai dengan 9,29 Hz, persebaran nilai faktor amplifikasi (Ao) bernilai antara 0,03 hingga dengan 7,07, sedangkan inversi kurva H/V menghasilkan nilai kecepatan gelombang P (VP) dan gelombang S (VS) dimana nilai VP berkisar antara 390 m/s sampai dengan 4.993 m/s dan nilai VS berada pada kisaran 190 m/s hingga 3.054 m/s.

Modeling of 3D Aquifer Layers using Poisson’s Ratio Analysis HVSR Method in Tembelang Village, Candimulyo District, Magelang Regency Achmad Syaifuddin Zuhri; Udi Harmoko; Gatot Yuliyanto
Journal of Physics and Its Applications Vol 3, No 1 (2020): November 2020
Publisher : Diponegoro University Semarang Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jpa.v3i1.9389

Water is one of vital needs for human beings. People use water to drink, bath, irrigate, and etc. Water supply has become a severe problem over the two past years especially in Tembelang Village, Candimulyo District, Magelang Regency. The research aims to determine the aquifer layers. The method used in this research is seismic method with HVSR (Horizontal to Vertical Spectral Ratio) microtremor survey with 71 measurement points. The HVSR microtremor data is processed to determine Poisson’s ratio from Vp⁄Vs ratio. The obtained Vp⁄Vs ratio from 71 measurement points ranges from 1.63 to 2.64 and Poisson's ratio ranges from 0.20 to 0.42. The Vp⁄Vs ratio parameter to determine an aquifer is more than 1.73 and the Poisson's ratio is more than 0.25. There are 4 zones which are considered to have aquifers, namely at line 1 near point P22 depth of over 184 meters, line 2 near point P8 depth of 108-180 meters, line 3 near point P2 and P3 depth of 91-161 meters, line 4 near point P16, P17, and P18 depth of 32-187 meters. line 5 near point T22 depth of 63-157 meters, point T31 depth of 122-152 meters, and point T40 depth of 71-178 meters. The Vp⁄Vs ratio and Poisson’s ratio are then modeled by using Rockwork 15 to obtain 3D models of acquifers based on the Vp⁄Vs ratio and Poisson’s ratio.

Clustering of seismicity in the Indonesian Region for the 2018-2020 Period using the DBSCAN Algorithm Akrima Amalia; Udi Harmoko; Gatot Yuliyanto
Journal of Physics and Its Applications Vol 4, No 1 (2021): November 2021
Publisher : Diponegoro University Semarang Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jpa.v4i1.11884

Indonesia is located at the confluence of 3 large, active plates that are constantly moving. Therefore, Indonesia is one of the countries that has a high level of seismicity risk. This study aims to classify seismicity data in the Indonesian region based on coordinate data which contains variable data on frequency of occurrence, depth, and strength of seismicity. Seismicity data was obtained from the BMKG official website using data for the period 2018 to 2020. The clustering technique used was the DBSCAN algorithm. This algorithm requires epsilon and MinPts input parameters. The results of the cluster formed will then be validated using silhouette coefficients. Based on the coordinate data, 4 clusters were formed with 4 disturbances. Based on the characteristic data, 3 clusters were formed with 5 disturbances. The silhouette coefficient obtained was 0.35 for coordinate data and 0.39 for characteristic data. This research is useful for increasing the use value of abundant seismicity information and can be used as an effort to mitigate seismicity natural disasters.

Vibration Vulnerability Identification in Kota Lama Semarang using Microtremor Method Dwi Purwantoro Sasongko; Gatot Yuliyanto; Zaenal Arifin
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 9, No 02 (2019): October
Publisher : Department of Physics, Sebelas Maret University

Kota Lama is one of the landmarks in Semarang Central Java that is located on young alluvial sediment. This area is prone to vibrations stemming from tectonic activities around Semarang. Therefore, measurements were carried out to identify this vibration vulnerability using the microtremor method. These were aimed at obtaining a spatial distribution of vibration vulnerability. There were 29 measurement points each separated by a sampling interval of 50 ms and a duration of 10 minutes. Ground vibration amplification in this area was found to range from 0.74 to 4.9 with the highest being on the outskirts of Kota Lama. The predominant frequency was found to range from 0.02 to 1.1 Hz. These patterns of high predominant frequency and ground vibration amplification suggest that the central area of Kota Lama needs more attention. High ground shear strain that ranges from 0.02 to 0.86 means that possible event to occur in Kota Lama include landslide, soil compaction, and liquefaction, as is also evident with existing dynamic properties of repeated collapse effect and loading speed effect. Meanwhile, structure of vibration amplification against predominant frequency underneath Kota Lama revealed lateral subsurface discontinuity on its southwest side. It was also found that the contour of ground vibration amplification resembles the shape of Vifjhoek fort.

Insentif dan Disinsentif Ekonomi pada Perlindungan Hiu Martil (Sphyrna spp.) sebagai Tangkapan Sampingan di Aceh Jaya Rohmah, Lailia Nur; Yulianto, Gatot; Kamal, Mohammad Mukhlis; Adrianto, Luky; Booth, Hollie
Buletin Ilmiah Marina Sosial Ekonomi Kelautan dan Perikanan Vol 9, No 2 (2023): Desember 2023
Publisher : Research Center for Marine and Fisheries Socio-Economic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/marina.v9i2.12547

Hiu martil (Sphyrna spp.) memiliki peluang tertangkap dan tingkat eksploitasi yang tinggi karena bentuk kepala yang unik dan perilaku agregasi remaja di perairan pesisir dangkal. Hiu yang didaratkan di PPI Rigaih umumnya merupakan bycatch, berukuran kecil dan belum dewasa/anakan.. Penelitian ini bertujuan untuk menganalisis karakteristik nelayan di Aceh Jaya dan mengestimasi besaran insentif maupun disinsentif ekonomi sebagai upaya perlindungan hiu martil di Aceh Jaya. Metode pengumpulan data yang digunakan adalah survei. Pengambilan data primer dilakukan dengan wawancara terstruktur kepada nelayan kecil di Aceh Jaya, pada bulan April sampai dengan Agustus 2022. Responden berjumlah 48 orang yang dipilih menggunakan metode simple random sampling. Metode analisis penghitungan insentif nelayan menggunakan Contingent Valuation Methods (CVM). Hasil riset menunjukkan bahwa karakteristik nelayan di Aceh Jaya adalah nelayan kecil yang beroperasi menggunakan kapal kayu berukuran 5-10 gross tone dengan durasi penangkapan ikan adalah one-day fishing dan ada juga yang 2-5 hari/trip. Estimasi besaran denda (disinsentif) yang bersedia dibayarkan oleh nelayan apabila masih melakukan penangkapan hiu martil (WTP) rata-rata sebesar Rp259.375,00/trip. Kesediaan membayar denda dipengaruhi oleh usia, pendidikan, pendapatan, dan jumlah anak. Insentif ekonomi berupa kesediaan nelayan menerima kompensasi sebagai pengganti aktivitas penangkapan hiu martil (WTA) dengan estimasi rata-rata sebesar Rp434.895,83/trip. Variabel yang berpengaruh adalah usia, pendidikan, lama trip dan pendapatan Title: Economic Incentive and Disincentiveson Protection of Hammerhead Sharks (Sphyrna spp.) as By-catch in Aceh Jaya Hammerhead sharks (Sphyrna spp.) have a high chance of being caught due to their unique head shape and juvenile aggregation behavior in shallow coastal waters whose areas overlap with capture fisheries with high levels of exploitation. These Sharks have landed at the fish landing port Rigaih of Aceh Jaya Regency, which is generally by-catch with small size at the immature/pre-adult stage. This study aims to analyze the characteristics of hammerhead fishermen in Aceh Jaya and estimate the amount of economic incentives in the form of fines to protect hammerhead sharks in Aceh Jaya. The descriptive survey was used as the data collection method in this research. The deep interview was conducted to collect primary data from fishermen from April to August 2022. This research calculates the fisherman’s incentive using contingent valuation method (CVM) analysis. A total of 48 respondents were selected using the simple random sampling method. The findings show that the characteristics of fishermen in Aceh Jaya are small fisheries that operate using 5-10 gross-tone wooden boats with one-day fishing duration and some 2-5 days/trip. The estimated disincentives fishermen will pay if they still catch hammerhead sharks (WTP) is an average of IDR 259,375.00/trip. Willingness to pay is influenced by age, education, income, and number of children. Economic incentives include fishermen’s willingness to receive compensation instead of fishing for hammerhead sharks (WTA), with an average estimated IDR 434,895.83/trip. Influential variables are age, education, length of trip, and income.

Potential Suitability and Carrying Capacity of the Mangrove Ecosystem for Ecotourism in Coastal Pejarakan Village purnama, Fajar adi; Yulianto, Gatot; Kurnia, Rahmat
Agrikan Jurnal Agribisnis Perikanan Vol. 16 No. 1 (2023): Agrikan: Jurnal Agribisnis Perikanan
Publisher : Fakultas Pertanian, Universitas Muhammadiyah Maluku Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52046/agrikan.v16i1.1480

Analysis of suitability and carrying capacity are two fundamental aspects in assessing the suitability of an area for a particular designation concerning sustainability aspects. Pejarakan Village, one of the villages on the north coast of Buleleng Regency, Bali Province, has a natural potential to be developed for marine tourism activities. However, mangrove ecosystem management in general has not been optimally implemented to become an added economic value for the local community. Therefore, to realize the sustainable utilization of coastal areas, especially mangroves in Pejarakan Village to become a new Tourism Attraction Object (ODTW), a regional carrying capacity study (DDK) and a tourism suitability analysis (IKW) were carried out. This study aims to analyze the tourism suitability index based on the potential of mangrove resources and calculate the carrying capacity of an area based on the number of people that can be accommodated in an area at a certain time without causing disturbance to nature or humans. The research uses an in situ scheme using the Spot Check Method and purposive sampling of mangrove ecosystems to analyze the tourism suitability index and the areaâ€™s carrying capacity. This research was conducted from October to November 2022 in the mangrove area of Pejarakan Village. Based on the studyâ€™s results, a suitable tourism suitability index was obtained in the northern part of the area (area 2), and then the potential length of the mangrove track was approximately 700 meters and could accommodate 112 people per day.

Distribusi Pendapatan Nelayan pada Perikanan Skala Kecil dan Besar di Selat Sunda Yonvitner, Yonvitner; Wafi, Hanif; Yulianto, Gatot; Boer, Mennofatria; Kurnia, Rahmat
Agrikan: Jurnal Agribisnis Perikanan Vol 13, No 1 (2020)
Publisher : Sangia Research Media and Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29239/j.agrikan.13.1.9-16

Perikanan selat Sunda termasuk kegiatan perikanan skala kecil (<10 GT) dan skala besar (>10 GT) yang masih menerapkan sistem bagi hasil dari pendapatan. Untuk itu perlu ditentukan tingkat pendapatan yang diperoleh sebagai bagian dari usaha penangkapan. Penelitian yang dilakukan di Selat Sunda Labuan dan Lempasing untuk menjawab besaran pendapatan yang diperoleh. Hasil menunjukkan bahwa pendapatan yang diperoleh relative sama antara < 10 GT dan > 10 GT. Secara umum terlihat risiko penangkapan terhadap pendapatan masih tinggi saat musim panceklik. Untuk itu diupayakan 40 persen dari kelebihan pendapatan dari kebutuhan dipergunakan untuk menabung agar nelayan tetap memperoleh manfaat saat musim panceklik.

Concentration of Heavy Metal (Pb) in the Body of Sea Urchins at Serangan Beach, Bali: Konsentrasi Kandungan Timbal (Pb) dalam Tubuh Bulu Babi di Pantai Serangan, Bali Agung, Gede Panji; Yulianto, Gatot; Damar, Ario
Habitus Aquatica Vol 4 No 2 (2023): Habitus Aquatica : Journal of Aquatic Resources and Fisheries Management
Publisher : Department of Aquatic Resources Management, Faculty of Fisheries and Marine Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/HAJ.4.2.44

Pantai Serangan yang terletak di Pulau Serangan, Denpasar, Bali. Tercatat memiliki potensi bulu babi yang sangat melimpah untuk dikembangkan potensi nya, Timbal (Pb) merupakan logam yang banyak dimanfaatkan oleh manusia sehingga logam ini juga menimbulkan dampak kontaminasi terhadap lingkungan. Sebagaian besar pencemaran Logam berat (Pb) masuk ke perairan berasal dari penggunaan emisi berbahan bakar minyak pada kapal. Oleh sebab itu perlu menentukan konsetrasi Logam berat (Pb) pada tubuh bulu babi di Pantai Serangan, Bali. Penelitian ini menggunakan metode kuantitatif dan (AAS). Pada proses pengambilan data menggunakan metode purposive sampling yaitu memilih empat lokasi yang diketahui menjadi habitat bulu babi. Hasil yang didapatkan menunjukan bahwa konsentrasi logam berat Pb pada tubuh bulu babi pada keempat stasiun adalah rata-rata nilai tiap stasiun konsentrasinya 0,013 ,0,009, 0,008 dan 0,007. Nilai konsentrasi logam berat Pb pada tubuh bulu babi lebih rendah jika dibadingkan dari nilai standar logam berat pada biota di perairan.

Economic Analysis for Sustainable Management of Marine Protected Areas in Ujung Kulon National Park (UKNP) Suparyana, Suparyana; Fauzi, Akhmad; Kusumastanto, Tridoyo; Yulianto, Gatot
ECSOFiM (Economic and Social of Fisheries and Marine Journal) Vol 11, No 1 (2023): ECSOFiM October 2023
Publisher : Faculty of Fisheries and Marine Science, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.ecsofim.2023.011.01.03

The protection of ecosystems and natural resources continues to be a top priority for the management of the Marine Conservation Area (MCA) of Ujung Kulon National Park (UKNP). Managers haven't given management of the economic and social use issues much thought. In reality, if it is properly managed, the MCA UKNP's economic potential can contribute to raising the economic well-being of the neighbourhood. Estimating the MCA UKNP's economic value and examining its economic and financial viability are the two goals of this manuscript. Survey research is used as the research methodology, together with overall economic valuation and financial and economic feasibility study. The findings of the study are as follows: 1) The mangrove environment, which is worth IDR1,215,105,470,571, and the coral reef ecosystem, which is worth IDR1,390,406,119,529, together make up the overall economic valuation of the MCA UKNP, which is IDR2,605,511,590,100. 2) The financial and economic feasibility analysis's findings indicate that the financial NPV is 1,963,392,508,016 and the economic NPV is 1,927,390,315,754 > 0, the financial Net B/C value is 21,28 and the economic Net B/C value is 19,30 > 1.0, and the financial IRR value is 39.54 and the economic IRR is 39.43% > 20% (MARR). The analyses' findings support the MCA UKNP's declaration that its determination was practicable.

Co-Authors . Sahid . Zairion Abdur Rosyid Achmad Fahrudin Achmad Syaifuddin Zuhri Achmad Widodo Agung Cahyono Agung, Gede Panji Akhmad Fauzi Akrima Amalia Ario Damar Arshad, Mazlan Asronj Bakkit Simanjuntak Baskoro Rochaddi Booth, Hollie Charles Parningotan Haratua Simanjuntak Dwi Purwantoro Sasongko Fauzan, Fatih Ahmad Fenti Listiyani Fery Kurniawan Firda, Hasdinar Fredinan Yulianda Hades Mandela, Hades Hotlan Simbolon Indah, Mega Natasha Irham Nurwidyanto Irma Akhrianti Johan Maulana Hadi Kurniawati, Dwi Shinta Luky Adrianto M. Nurdin W. P. Majariana Krisanti Mardyani, Yeyen Mars Widodo Mennofatria Boer Mohammad Mukhlis Kamal Muhammad Yusuf Muhammad Zainuri Naufalzuhdi, Achyar purnama, Fajar adi Putra, Aditya Handoyo R. Sapto Hendri Boedi Soesatyo Rachmawani, Dori Rahmat Kurnia Rakhmat Syaefullah Riza Eka Prabowo Rohmah, Lailia Nur Rr. Tony Yulianto Sadelie, Agus Sahid Sahid Saiful Nurul Hudha sapanli, kastana Sidhi Saputra Siti Khasanah Siti Zulaikhah Sri Wahyuningrum Sugeng Widada Sugeng Widada Sugeng, Santoso Suparyana, Suparyana Suryono Suryono Taufiq Yuana Teguh Suroso Tridoyo Kusumastanto Udi Harmoko Udi Harmoko Vithya Arintalofa Wafi, Hanif Yonvitner - Yudha, Firsta Kusuma Yusuf D. H. Yusuf D.H Yusuf Dewantoro Herlambang Zaenal Arifin

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