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All Journal Jurnal Ilmu dan Teknologi Kelautan Tropis ILMU KELAUTAN: Indonesian Journal of Marine Sciences Journal of Oceanography Syntax Literate: Jurnal Ilmiah Indonesia NUSANTARA : Jurnal Ilmu Pengetahuan Sosial Jurnal Kelautan Nasional Jurnal Chart Datum Indonesian Journal of Earth Sciences Indonesian Journal of Oceanography Jurnal Mandiri IT International Journal of Humanities Education and Social Sciences Formosa Journal of Science and Technology (FJST) Jurnal Hidrografi Indonesia Journal of Fisheries & Marine
Gentio Harsono
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Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Mathematics Social Sciences Other

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Journal : Formosa Journal of Science and Technology (FJST)

 1 
Bathymetric Survey Using Singlebeam Echosounder for Calculation of Dredging Volume in Pertamina IV Cilacap Port Channel Kusmantoro, Yeri; Harsono, Gentio; Trismadi, Trismadi; Fatoni, Khoirul Imam
Formosa Journal of Science and Technology Vol. 3 No. 12 (2024): December 2024
Publisher : PT FORMOSA CENDEKIA GLOBAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55927/fjst.v3i12.12481

Abstract

The TUKS 60 Cilacap Port area is facing significant challenges due to sedimentation that causes the approach channel to silt up, thereby disrupting navigation and ship operations. This study identifies the depth distribution, assesses the quality of the bathymetric survey, and calculates the volume of dredged material needed to maintain a channel depth of 8 meters below the chart datum. The method used is a bathymetric survey using the Odom Hidrotrac II Singlebeam Echosounder (SBES), geodetic data from CORS-based GPS, and tidal correction from Low Water Spring. (LWS). Data processing was carried out using Hypack 2015 software and the average end area method for volume calculation. Survey data were validated using the criteria from the International Hydrographic Organization (IHO) S-44 Edition 6.1.0 standard. (2020). The results show a depth ranging from -1.2 meters to 10 meters, with 95.8% meeting the exclusive and special order criteria. The volume of dredging required to reach the design depth is 159,991 m³. These findings support dredging planning while ensuring navigational safety and operational sustainability of the port, demonstrating the reliability of SBES technology, Hypack 2015, and compliance with IHO validation for the dredging plan.
Analysis of Sea Surface Temperature (SST) Patterns in Arafura Waters Using Google Earth Engine (GEE) for Early Detection of Environmental Threats Sadewa, Annisa Harum; Harsono, Gentio; Prihanto, Yosef; Haloho, Luwis Surani
Formosa Journal of Science and Technology Vol. 3 No. 11 (2024): November 2024
Publisher : PT FORMOSA CENDEKIA GLOBAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55927/fjst.v3i11.12164

Abstract

Global warming that is happening today can result in an increase in sea surface temperatures. High sea surface temperatures can potentially disrupt the stability of ecosystems in Arafuru Waters. The waters of Arafuru are located in the south of Papua and border the country of Australia. This study aims to analyze the increase in sea surface temperature in waters using a satellite image processing method with Google Earth Engine (gee) software in a span of one year in 2021. The results obtained in this study are that the sea surface temperature value is around 28-300C which is in the medium category according to the Ministry of Marine Affairs and Fisheries. In this study, it is expected to be able to deal with environmental threats caused by rising sea surface temperatures, especially marine life.
Application of Weather Modification Technology for Wetting Peatlands as a Mitigation Measure for Forest and Land Fires in South Kalimantan Province Fitriano, Lutfi; Poniman, Aris; Harsono, Gentio
Formosa Journal of Science and Technology Vol. 3 No. 11 (2024): November 2024
Publisher : PT FORMOSA CENDEKIA GLOBAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55927/fjst.v3i11.12220

Abstract

Weather Modification Operation (WMO) was conducted in South Kalimantan Province from July 29 to August 9, 2024, to support the wetting of peatland as a measure to mitigate forest and land fires. (karhutla). This operation was carried out by inserting superfine powder NaCl seeding material, which was sown into the clouds using the TNI AU's Casa 212-200 aircraft. Global and local weather factors were taken into account in determining the timing and location of seeding. El Niño and Indian Ocean Dipole (IOD) factors that were in the neutral phase as well as warm sea surface temperatures (+0.5°C to +2.0°C) around the waters of South Kalimantan contributed to the success of this operation. In the implementation of OMC, analysis of air humidity in the 925 to 500 mb layer showed the potential for convective cloud growth in most of the target areas, although humidity decreased on several days in certain layers. The implementation of the operation successfully increased rainfall in the target area, with rain intensity varying between 0 to 40 mm per day during the OMC period, resulting in significant wetting of peatland and an increase in groundwater table height (TMAT) at critical locations. The contribution of OMC successfully reduced the risk of forest and land fires by decreasing the number of hotspots in the priority peatland areas of South Kalimantan. In line with the Indonesian government's climate change mitigation strategy, we expect the long-term impact of this activity to reduce the intensity of forest and land fires and carbon emissions from peatlands in this area.
Co-Authors Adi Purwandana Adrianto, Dian Agus Atmadipoera Akbar, Harun I. Alfany, Dini Amir Yarkhasy Yuliardi Amron Amron, Amron Anatansyah Ayomi Anandari Anggriawan Maydwika, Dhedy Anindya Wirasatriya Arif Maulana, Arif ARIS PONIMAN Budi Purwanto Budi Sukoco, Nawanto Cabral, Mario Dharma, Candrasa Surya Fatoni, Khoirul Imam Firdaus, Randi Gultom, Feri Gultom, Rudy A.G. Haloho, Luwis Surani Hari Priyadi Hascaryo, Anom Puji Henry Munandar Manik Heryoso Setiyono Heryoso Setyono Hudayat, Nurul Junaedi, Liva Kamija2, Kamija Khoirun Nisa KHOIRUN NISA Kunarso Kunarso Kurnia Darmawan, Lalu Kusmantoro, Yeri Lena Sumargana Lutfi Fitriano, Lutfi Mahardhika, Theodorus Karel Elang Malik, Kurnia Namira F.N., Riva Nugroho, Giant Patrick W., Fressan Pianto, Teguh A. Purwandana , Adi Puspitasari, Dyah C. Putra, I Wayan Sumardana Eka Putra, Iska Raden Bima Yoga B Rafii, Akhmad Rizqi Ayu Farihah, Rizqi Ayu Rudiastuti, Aninda W. Sadewa, Annisa Harum Safrudin, Muhammad Nur Saputra, Chairil Amin Setyo Pranowo , Widodo Sobar Sutisna Sry Mutia, Andike Subiantoro , Yudi Sudiarso, Aries Sugama, Agus Y. Sugianto, Deni N. Sukendra Martha Susilo, Ahmad Fa’iq Indra Sutejo, Bayu Suweni, Imanuel Trismadi Trismadi, Trismadi Utama, Alifka F. Wadjdi, Achmad Farid Waluyo, Dangan Wangdiarta, Fressan Patrick Widodo S Pranowo Widya, Kartika Wirasatriya , Anindya Wirasatya, Anindya Wiwin Ambarwulan Yosef Prihanto, Yosef Yuniarti Yuniarti Yuswantari, Truly