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All Journal International Journal of Electrical and Computer Engineering ILMU KELAUTAN: Indonesian Journal of Marine Sciences BULETIN OSEANOGRAFI MARINA Jurnal Kelautan Tropis Omni-Akuatika Jurnal Geologi Kelautan: Media Hasil Penelitian Geologi Kelautan Jurnal Riset Jakarta Jurnal HIDROPILAR Jurnal Chart Datum Computational and Experimental Research in Materials and Renewable Energy (CERiMRE) Jurnal Perikanan Geoid - Journal of Geodesy and Geomatics
Setiyadi, Johar
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Computer Science & IT Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Materials Science & Nanotechnology Physics

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ANALYSIS OF THE QUALITY OF SOUNDING DATA IN RELATION TO THE DIFFERENCES IN SEABED TOPOGRAPHY Lestari , Ria Putri; Pratomo , Danar Guruh; Setiyadi, Johar
GEOID Vol. 5 No. 1 (2009)
Publisher : Departemen Teknik Geomatika ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/geoid.v5i1.1282

Abstract

Visualizations of seabed surface topography is obtained from such an activity called sounding survey. Points of measurement of the depth are located sounding line and checkline crossing. In the research analysis is carried out on the relationship between the quality of the sounding data and the topography of the seabed, which was divided into five (5) criteria, that is, coral (Cr), coral sand (CrS), mud (M), mud sand (MS), and sand (S).In order to know the sounding data quality, is done by comparing the depth of intersection of the sounding line and the checkline crossing which is then referred to as the analysis point. The position and the depth of this point is found by the linear intepolation method. The result of this research indicate that there are irregularities in the depth of the analysis point, which indicates an error in the measurement accuracy. If viewed from the mistake that occur in the analysis point, the analysis points of the depth profile with the seabed topography of mud sand (MS) has the best accuracy compared to the other profiles. While the analysis poinst in the depth profile of coral (Cr) has the least level of accuracy compared to the others. Thus it can be said that the depth measurement done on mud sand (MS) has the best quality and the depth measurement done on coral (Cr) has the lowest quality.
Drivers of Tidal Flooding and Coastal Vulnerability in the Riau Islands, Indonesia: A Time-Series Analysis (2022-2024) Latifah, Laila; Pranowo, Widodo Setiyo; Mujiasih, Subekti; Ratnawati, Herlina Ika; Hatmaja, Rahaden Bagas; Suhana, Mario Putra; Setiyadi, Johar; Lelalette, Johanis Dominggus; Izzaturrahim, Muh. Hafizh; Ismail, M. Furqon Azis; Syah, Achmad Fachruddin; Ryanto, Fauzan Novan; Setiyono, Heryoso; Helmi, Muhammad
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 30, No 3 (2025): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.30.3.425-437

Abstract

The Indonesian Maritime Continent is highly vulnerable to climate variability and change, as exemplified by tidal flooding events in the Riau Islands from 2022 to 2024. This study aimed to analyze the characteristics of sea level dynamics and anomalies associated with tidal flooding (rob) and identify the contributing factors. Data on tidal flooding events were gathered from press and online social media reports, while additional information on significant wave height, ocean currents, and wind was obtained from the CMEMS (Copernicus Marine Environment Monitoring Service) Marine Copernicus archives (marine.copernicus.eu). Observational data from tide gauge stations were also accessed via the IOC sea level monitoring system (ioc-sealevelmonitoring.org). The findings revealed a high probability of tidal flooding during the north wind season, particularly in January and February. Notably, tidal elevations during flooding events reached 3.06 m on January 25, 2023, 3.00 m on February 21, 2023, and 3.09 m on February 12, 2024. These events were driven by a combination of oceanographic and atmospheric factors, including high tidal ranges during spring tides, strong wind speeds averaging 19.04 to 21.43 knots in January–February 2023 and 18.65 knots in February 2024, dominant southward current patterns, and significant wave heights reaching up to 1.08 m. The alignment of the sun, moon, and earth during full and new moon phases amplified gravitational forces, causing elevated sea levels. Furthermore, strong winds during the north wind season contributed to higher wave heights, intensifying flooding impacts. Analysis of current patterns indicates that the highest speeds were recorded during the northern wind season, specifically in January and February, which coincides with the tidal flooding events. The currents predominantly moved southward, aligning with the wind direction during this season. This study reveals oceanographic and atmospheric interactions driving tidal flooding, offering insights for mitigation and adaptation to enhance resilience in vulnerable coastal regions.
Karakteristik Struktur Lapisan Termoklin Di Laut Andaman Dalam 4 Monsun Selama 1 Tahun Rahmatullah, Amri; Asmoro, Nuki Widi; Azis, Muhammad; Pranowo, Widodo Setiyo; Setiyadi, Johar
Buletin Oseanografi Marina Vol 13, No 1 (2024): Buletin Oseanografi Marina
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/buloma.v13i1.54877

Abstract

Suhu air laut menjadi salah satu parameter penting dalam bidang oseanografi. Salah satunya adalah termoklin, yaitu lapisan perairan dengan perubahan suhu yang cepat diantara lapisan yang berbeda. Karakteristik laut Andaman banyak yang belum diulas terutama pengaruh periodisitas monsun terhadap struktur lapisan termoklin. Penelitian ini menggunakan metode penelitian kuantitatif deskriptif dengan data model dari Copernicus. Tujuan penelitian ini untuk mengidentifikasi dan menganalisis karakteristik struktur lapisan termoklin di laut Andaman. Hasil pengolahan data menunjukkan lapisan termoklin dalam 4 monsun secara menyeluruh. Sebaran batas atas termoklin berada pada kisaran kedalaman 13,47-109,73 m dan suhu antara 29,87-20.36˚C. Sebaran batas bawah berada pada kisaran kedalaman antara 130,67-155,85 m dan suhu antara 23,85-16,83˚C. Karena didominasi pengaruh monsun sehingga batas atas termoklin terdangkal ditemukan pada monsun Peralihan I dan batas bawah paling dalam pada monsun Timur dan Peralihan II.  Struktur lapisan termoklin berada pada rentang ketebalan termoklin dari 17,4-80,28 m dan rata-rata ketebalan termoklin sebesar 47,18 m. Ketebalan maksimum ditemukan pada monsun Peralihan I dengan ketebalan hingga 80,28 m. Peningkatan ketebalan termoklin pada Monsun Peralihan I terjadi akibat pengaruh angin, SPL yang meningkat  dan masuknya Equatorial Jet yang membawa arus lebih hangat dan East Indian Current (EIC) yang berputar tetap searah jarum jam di Utara Laut Andaman.The sea temperature is one of the important parameters in oceanography. One of them is the thermocline, which is a layer of water with rapid temperature changes between different layers. Many characteristics of the Andaman Sea have not been reviewed, especially the effect of monsoon periodicity on the structure of the thermocline layer. This research uses descriptive quantitative research methods with model data from Copernicus.  This study aims to identify and analyze the characteristics of thermocline layer structure in the Andaman Sea. The results of data processing show the thermocline layer in 4 monsoons as a whole. The distribution of the upper boundary of the thermocline is in the range of 13.47-109.73 m depth and temperature between 29.87-20.36˚C. The lower boundary distribution is in the range of depths between 130.67-155.85 m and temperatures between 23.85-16.83˚C. Due to the dominant influence of monsoon, the shallowest upper thermocline was found in the first monsoon and the deepest lower thermocline in the second monsoon.  The thermocline layer structure ranges in thermocline thickness from 17.4-80.28 m, with an average thermocline thickness of 47.18 m. The maximum thickness is found in the Transitional I monsoon with a thickness of up to 80.28 m. The increase in thermocline thickness in Monsoon Transitional I occurs due to the influence of winds, increased SPL and the entry of the Equatorial Jet which brings warmer currents and the East Indian Current (EIC) which rotates clockwise in the North of the Andaman Sea.
ANALISA PROFIL DASAR LAUT DAN KARAKTERISTIK SEDIMEN MENGGUNAKAN MULTIBEAM ECHOSOUNDER DI PERAIRAN JAKARTA asmoro, nuki widi; Manik, Henry Munandar; Umam, Choirul; azhari, Ferian; Pranowo, widodo setiyo; Kurniawan, Muhammad Azis; Setiyadi, Johar; Prihantoro, Andi Exyas
JURNAL GEOLOGI KELAUTAN Vol 22, No 1 (2024)
Publisher : Pusat Penelitian dan Pengembangan Geologi Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32693/jgk.22.1.2024.843

Abstract

Profil dan karakteristik sedimen dasar laut menjadi informasi penting dalam kegiatan pengerukan alur Pelabuhan. Dasar sedimen yang bervariasi dan area pengerukan yang luas harus dapat dipetakan, serta dianalisa secara tepat agar memudahkan kegiatan pengerukan. Teknologi multibeam echosounder(MBES) dapat digunakan untuk mendeteksi kedalaman dan merekam data pantulan dasar laut, yang kemudian diproses menjadi mozaik pantulan sehingga membantu mengidentifikasi jenis dan morfologi dasar laut. Penelitian ini dilaksanakan di alur Pelabuhan Rukindo perairan Jakarta yang merupakan ordo khusus dengan kedalaman bervariasi. Penelitian ini dilakukan menggunakan data in situ MBES dengan menganalisis nilai hamburan balik (backscatter) metode Angular Range Analysis dan Sediment Analysis Tools (ARA&SAT) dimana hubungan hamburan balik sangat erat dengan ukuran butiran sedimen. Validasi dilaksanakan dengan pengambilan sedimen, menggunakan grab sample sebanyak 12 titik di area penelitian, kemudian melaksanakan pengujian contoh sedimen di laboratorium untuk menghasilkan klasifikasi sedimen skala wenthworth. Penelitian ini bertujuan untuk memberikan gambaran hasil pengujian sedimen dengan nilai backscatter MBES dan hasil penelitian ini diharapkan menjadi dasar pengklasifikasian sedimen halus berdasarkan nilai backscatter di laut Jakarta. Hasil dari penelitian ini didapatkan nilai intensitas sedimen dari backscatter MBES antara -15 db s.d -30 db dengan 3 klasifikasi sedimen yang didominasi oleh sedimen pasir halus. Berdasarkan nilai backscatter MBES diharapkan diketahui klasifikasi jenis sedimen sehingga berkontribusi untuk perencanaan pengerukan alur pelabuhan terkait dengan jenis substrat bawah laut sehingga kegiatan pengerukan dapat dilakukan dengan aman dan efektif.
Co-Authors Adrianto, Dian Adventari, Tara Aida Sartimbul Asmoro, Nuki Widi Ayuningsih, Tarisa Lestari Azhari, Ferian Azhari, Ferian Azhari Azies, Ibnu Abdul Carudin, Carudin Choirul Umam, Choirul Djunarsjah, Eka edy susanto Engki Andri Kisnarti Fatah, Ujang Gathot Winarso, Gathot Hadi P, Nanang Handoko, Dadang Hardianto, Budi Hascaryo, Anom Hatmaja, Rahaden Bagas Hendra Hendra Henry Munandar Manik Herlina Ika Ratnawati, Herlina Ika Heryoso Setiyono I Made Jiwa Astika Ihlas, Ihlas Iwan Santoso, Agus Izzaturrahim, Muh. Hafizh Jantarto, Dwi Jusup Suprijanto Kamija, Kamija Koswara Koswara, Koswara Kurniawan, Endro Sigit Kurniawan, Muhammad Azis Kusuma N, Adhi Kusuma Negara, Adhi Latifah, Laila Lazuardi, Muhammad Nur Riza Lelalette, Johanis Dominggus Lestari , Ria Putri Lufti Ibrahim, Ahmad M. Furqon Azis Ismail Malik, Kurnia Mario Putra Suhana Monang S, Sahat Mudho, Hendrik Trio Muhammad Azis Muhammad Helmi Muhammad Ramdhan Nurjumanis, Amanda Nurkarya, Yoyok Oktavianto, Eka Arif Prahasta, Eddy Pratomo , Danar Guruh Prihantoro, Andi Exyas Putra, I Wayan Sumardana Eka Qodar, Muhammad Rahayu, Shafira Primasty Rahmatullah, Amri Ryanto, Fauzan Novan S Mulyadi, Dikdik Sapto Saputro, Bayu Setiyo, Marman Subekti Mujiasih Sudarman Sudarman Suhadi Suhadi Sukoco, Nawanto Budi Sumardana, I Wayan Eka Sunardi - Sunaryo Sunaryo Trijoko Trijoko Umam, Choirul Umam Wibowo, Nazil Syamtri Wibowo Widodo S Pranowo Zulfikar, Dwi Aji