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INDONESIA
Jurnal Kelautan : Indonesian Journal of Marine Science and Technology
Published by Universitas Trunojoyo Madura
ISSN : 19079931     EISSN : 24769991     DOI : -
Core Subject :
This journal encompasses original research articles, review articles, and short communications, including: Marine and fisheries ecology and biology, Marine fisheries, Marine technology, biotechnology, Mariculture, Marine processes and dynamics, Marine conservation, Marine pollution, Marine and coastal resource management, Marine and fisheries processing technology, Salt technology, Marine geology, physical and chemical oceanography.
Arjuna Subject : -
Articles 394 Documents
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Karakterisasi Senyawa Bioaktif dan Aktivitas Antioksidan Ekstrak Kasar Caulerpa sp dan Gracilaria sp dari Perairan Bangkalan Madura Qoyyimah, Umi Nafisatul; Hafiludin, Hafiludin
Jurnal Kelautan Vol 18, No 3: Desember (2025)
Publisher : Department of Marine Sciences, Trunojoyo University of Madura, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/jk.v18i3.32623

Abstract

ABSTRAKRumput laut pada umumnya dapat dimanfaatkan sebagai sumber pangan dan juga sebagai antioksidan alami. Rumput laut yang berpotensi sebagai bahan aktioksidan alami dari perairan Bangkalan yaitu Caulerpa sp. dan Gracilaria sp. dikarenakan kandungan senyawa bioaktif di dalamnya. Penelitian ini bertujuan untuk mengetahui karakterisasi fisik dan kimia, kandungan senyawa bioaktif serta aktivitas antioksidan dari ekstrak kasar Caulerpa sp. dan Gracilaria sp. Penelitian dilaksanakan di Laboratorium Bioteknologi Laut, Universitas Trunojoyo Madura dengan beberapa tahap yaitu: preparasi sampel, analisa proksimat, analisa fitokimia dan analisis aktivitas antioksidan dengan DPPH. Hasil identifikasi morfologi Caulerpa sp memiliki warna hijau tua dan ramuli kecil seperti anggur. Gracilaria sp. memiliki warna merah kecoklatan dengan percabangan yang tidak teratur seperti akar serabut. Kadar proksimat Caulerpa sp dan Gracilaria sp. menunjukkan tingginya kadar air, abu, dan serat kasar, dibandingkan protein dan lemaknya. Ekstrak kasar rumput laut Caulerpa sp mengandung senyawa bioaktif berupa flavonoid, fenolik, steroid, terpenoid, alkaloid, saponin, dan tannin.  Ekstrak kasar rumput laut Gracilaria sp. senyawa bioaktif yaitu alkaloid, steroid, flavonoid, fenol, saponin, dan terpenoid. Aktivitas antioksidan terbaik terdapat pada ekstrak kasar rumput laut Caulerpa sp. pelarut n-heksan dengan nilai IC50 sebesar 116,41 ppm lebih kuat dibandingkan dengan ekstrak kasar rumput laut Gracilaria sp. Rumput laut dari perairan Bangkalan berpotensi dapat dikembangkan sebagai bahan bahan pangan alami dan antioksidan alami di masa yang akan datang.Kata Kunci: Caulerpa sp, Gracilaria sp, senyawa bioaktif, dan aktivitas antioksidan. ABSTRACTSeaweed in general can be used as a food source and also as a natural antioxidant. Seaweed that has the potential as a natural antioxidant from Bangkalan waters is Caulerpa sp. and Gracilaria sp. due to the content of bioactive compounds in it. This research aims to determine the physical and chemical characteristics, content of bioactive compounds and antioxidant activity of crude extracts of Caulerpa sp. and Gracilaria sp. The research was carried out at the Marine Biotechnology Laboratory, Trunojoyo University, Madura in several stages, namely: sample preparation, proximate analysis, phytochemical analysis and antioxidant activity analysis with DPPH. The results of the morphological identification of Caulerpa sp have a dark green color and small ramuli like grapes. Gracilaria sp. has a brownish red color with irregular branching like fibrous roots. Proximate levels of Caulerpa sp and Gracilaria sp. shows high levels of water, ash and crude fiber, compared to protein and fat. Caulerpa sp seaweed crude extract contains bioactive compounds in the form of flavonoids, phenolics, steroids, terpenoids, alkaloids, saponins and tannins. Crude extract of seaweed Gracilaria sp. Bioactive compounds are alkaloids, steroids, flavonoids, phenols, saponins and terpenoids. The best antioxidant activity is found in the crude extract of seaweed Caulerpa sp. with n-hexane solvent was an IC50 value of 116.41 ppm is stronger than the crude extract of seaweed Gracilaria sp. Seaweed from Bangkalan seawaters has the potential to be developed as a natural food ingredient and natural antioxidant in the future.Keywords: Caulerpa sp, Gracilaria sp, bioactive compounds, and antioxidant activity.
Analisis Potensi Hutan Mangrove Sebagai Ekowisata Berkelanjutan Untuk Peningkatan Ekonomi Masyarakat Pesisir Desa Nelayan Seberang, Medan Belawan Daulay, Aulia Putra; Al'fatah, A'ung Ezra; Silalahi, Hanna Tresia
Jurnal Kelautan Vol 18, No 3: Desember (2025)
Publisher : Department of Marine Sciences, Trunojoyo University of Madura, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/jk.v18i3.32191

Abstract

ABSTRAKEkosistem mangrove memiliki tingkat produktivitas yang tinggi yang memiliki banyak fungsi yang penting diantaranya fungsi ekonomi, sosial, dan lingkungan. Fungsi ekonomi dari hutan mangrove dimanfaatkan oleh masyarakat lokal dalam ekowisata mangrove. Ekowisata merupakan model bagi pengembangan pariwisata berkelanjutan, dalam model pariwisata bagi pemerintah daerah dan masyarakat setempat, ekowisata juga berperan tidak hanya memiliki manfaat ekonomi tetapi memiliki manfaat ekologis dan sosial. Oleh sebab itu, tujuan penelitian ini adalah menganalisis potensi dan manfaat hutan mangrove sebagai ekowisata mangrove dalam meningkatkan perekonomian masyarakat lokal. Peneilitian dimulai dengan mengambil data jenis dan jumlah individu, kerapatan jenis, data pasang surut air laut yang dikumpulkan melalui pengambilan data langsung di lokasi penelitian. Informasi lokal, peta, dan dokumen yang berkaitan dengan kondisi penelitian dan hutan mangrove yang diperoleh melalui pengelola hutan mangrove. Selanjutnya, melakukan pengamatan kerapatan jenis, kerapatan relative jenis, frekwensi relative jenis, dominansi relative jenis, dan indeks keragaman jenis. Terakhir, melakukan analisis parameter kesesuaian ekowisata, dan analisis SWOT. Hasil dalam penelitian didapat sebanyak 11 jenis dengan total sebanyak 330 individu. Individu yang banyak di jumpai yaitu jenis Avicennia alba dengan nilai INP sebesar 89,25. Nilai IKW yang didapat sebesar 96,05 dengan kategori S1 (sangat sesuai) untuk ekowisata. Hutan mangrove di Desa Nelayan Seberang termasuk kedalam sesuai untuk ekowisata dengan beberapa analisis SWOT yang digunakan salah satunya dengan promosi melalui media sosial dan dukungan dari pemerintah dalam membangun fasilitas serta perkembangan dalam ekowisata mangrove. Kata Kunci: Analisis, Ekonomi, Ekowisata, Mangrove, MasyarakatABSTRACTMangrove ecosystems have high productivity and serve many important functions, including economic, social, and environmental functions. The economic function of mangrove forests is utilized by local communities in mangrove ecotourism. Ecotourism is a model for sustainable tourism development. In the tourism model for local governments and communities, ecotourism not only has economic benefits but also ecological and social benefits. Therefore, the purpose of this study is to analyze the potential and benefits of mangrove forests as mangrove ecotourism in improving the local community's economy. The study began by collecting data on species and number of individuals, species density, and tidal data, which was collected through direct data collection at the study site. Local information, maps, and documents related to the research conditions and mangrove forests were obtained from the mangrove forest managers. Next, observations were made on species density, relative species density, relative species frequency, relative species dominance, and species diversity index. Finally, an analysis of ecotourism suitability parameters and a SWOT analysis were conducted. The results of the study found 11 species with a total of 330 individuals. The most commonly found individual was the Avicennia alba species with an INP value of 89.25. The IKW value obtained was 96.05 with a category of S1 (very suitable) for ecotourism. The mangrove forest in Nelayan Seberang Village is suitable for ecotourism based on several SWOT analyses, one of which is promotion through social media and government support in building facilities and developing mangrove ecotourism.Keywords: Analysis, Community, Economy, Ecotourism, Mangrove
Evaluasi Habitat Peneluran Penyu Pada Tiga Kawasan Konservasi Penyu Di Sumatera Barat Pasokawati, Farah Deshan; Jabbar, Meuthia Aula; Ruchimat, Toni; Rachmad, Basuki; Ilham, Yuwanda; Yendri, Yendri
Jurnal Kelautan Vol 18, No 3: Desember (2025)
Publisher : Department of Marine Sciences, Trunojoyo University of Madura, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/jk.v18i3.32395

Abstract

ABSTRAKPenelitian ini bertujuan untuk mengevaluasi karakteristik habitat pendaratan dan keberhasilan penetasan telur penyu di tiga kawasan konservasi penyu di Sumatera Barat, yaitu Pulau Pandan, Pulau Karabak Ketek, dan Ampiang Parak. Pengumpulan data dilakukan dengan pendekatan berbeda pada masing-masing lokasi, menyesuaikan kondisi ekologi dan akses lapangan. Pengamatan primer dilakukan di Pulau Pandan karena aktivitas pendaratan penyu masih terjadi dan lokasi dapat dijangkau selama penelitian. Sementara itu, pengumpulan data primer tidak dapat dilakukan di Pulau Karabak Ketek akibat kondisi gelombang tinggi, dan di Ampiang Parak tidak ditemukan penyu yang mendarat karena abrasi yang menyebabkan kemiringan pantai menjadi curam. Oleh karena itu, data pada kedua lokasi tersebut diperoleh melalui data sekunder dari laporan monitoring pengelola kawasan. Hasil penelitian menunjukkan bahwa Pulau Pandan memiliki tujuh sarang aktif (satu sarang alami dan enam semi-alami), sedangkan informasi dari Karabak Ketek dan Ampiang Parak diperoleh melalui monitoring tahunan pengelola. Variasi keberhasilan penetasan di Pulau Pandan (11-98%) berasal dari sarang bulan Januari-Desember 2024, sedangkan nilai 54-99% pada Karabak Ketek dan 73-100% pada Ampiang Parak merupakan rekapitulasi sarang semi-alami yang dikelola sepanjang tahun. Hasil penelitian menunjukkan bahwa Pulau Pandan masih memiliki habitat yang sesuai untuk peneluran, sementara dua lokasi lain menunjukkan penurunan fungsi habitat akibat abrasi dan gelombang tinggi. Penelitian ini merupakan evaluasi komparatif terbaru yang memadukan data primer dan monitoring tahunan untuk melihat pergeseran fungsi habitat penyu di Sumatera Barat.Kata Kunci: habitat peneluran, konservasi, penyu lautABSTRACTThe study aims to evaluate sea turtle nesting habitat characteristics and hatching success in three conservation areas in West Sumatera: Pandan Island, Karabak Ketek, and Ampiang Parak. Data collection methods differed among locations based on ecological conditions and field accessibility. Primary observations were conducted on Pandan Island, where active nesting was still occurring and field access was feasible. In contrast, primary data collection could not be conducted on Karabak Ketek Island due to high wave conditions, and no nesting activity was observed at Ampiang Parak due to coastal abrasion that caused steep beach slopes. Therefore, data from Karabak Ketek and Ampiang Parak were obtained from secondary monitoring records maintained by conservation staff. The findings show that Pulau Pandan recorded seven active nests (one natural nest and six semi-natural nests), while information from Karabak Ketek and Ampiang Parak was sourced from annual monitoring records. The variation in hatching success on Pandan Island (11-98%) represents nest outcomes recorded from January to December 2024, whereas the 54-99% range in Karabak Ketek and the 73-100% range in Ampiang Parak reflect semi-natural hatchery results managed throughout the monitoring year. Overall, the analysis indicates that Pandan Island still maintains suitable ecological conditions for natural nesting, while the other two locations have experienced a decline in habitat function due to abrasion and high wave exposure. This study presents the most recent comparative evaluations integrating primary field observations with annual monitoring data to identify shifts in sea turtle nesting habitat functionality in West Sumatera.Keywords: nesting habitat, conservation, sea turtle
Ecological Pressures In Pusong Harbour: Integrated Assessment Of Water Quality, Nutrient Enrichment, And Pollution Index 'Akla, Cut Meurah Nurul; Lubis, Malik Pajar; Erniati, Erniati; Firdaus, Rian; Imamshadiqin, Imamshadiqin; Imanullah, Imanullah
Jurnal Kelautan Vol 18, No 3: Desember (2025)
Publisher : Department of Marine Sciences, Trunojoyo University of Madura, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/jk.v18i3.31725

Abstract

ABSTRACTPusong Harbor in Lhokseumawe City doubles as a center for fisheries activities as well as a habitat for marine biota, making it vulnerable to pollution pressure from anthropogenic activities. This study aims to assess water quality through the analysis of physico-chemical parameters, nutrient content (nitrate and phosphate), pollution index, and spatial variation patterns using a multivariate approach. Measurements were taken at three stations representing the locations of boat moorings, settlements, and fish farms. The measurement results showed that basic parameters such as salinity (32-33‰), pH (7.5-8.0), dissolved oxygen (5.8-6.3 mg/L), and BOD (1.6-3.6 mg/L) were still within the quality standard range, but the brightness level was low (0.8-0.9 m) and the phosphate concentration was very high (7.2-10.1 mg/L), exceeding the quality standard by hundreds of times. The pollution index based on the harbor quality standard showed a Slightly polluted (PI = 1.09-1.11), but based on the marine biota quality standard it was classified as "heavily polluted" (PI = 10.3-10.9). PCA analysis identified phosphate and BOD as the dominant factors differentiating water quality, while temperature, salinity and DO were more reflective of natural conditions. Cluster analysis showed that stations 1 and 3 were similar, while station 2 differed significantly due to local pressures. This finding confirms the serious ecological pressures in the harbor area, especially due to excessive nutrient loads, and calls for pollutant control strategies and continuous monitoring to maintain the sustainability of coastal ecosystems. The study highlights the urgent need to address nutrient-driven pollution in Pusong Harbor, where phosphate concentrations exceed marine biota standards by hundreds of times despite most basic water parameters remaining within acceptable limits. This excessive nutrient load poses a serious threat of eutrophication, habitat degradation, and loss of biodiversity in a harbor that supports both fisheries activities and critical marine life. By integrating physico-chemical measurements, nutrient analysis, and multivariate statistics, the research identifies phosphate and BOD as key pollution drivers and reveals spatial variation linked to human activities. These findings provide evidence-based guidance for local management and policy, calling for targeted pollutant control and continuous monitoring to protect coastal ecosystems. The multivariate framework also offers a replicable approach for similar small-harbor environments across Southeast Asia.Keywords: water quality, pollution index, PCA, cluster, nutrients, Pusong Harbour
Comparative Performance Evaluation Of Machine Learning Algorithms For Sentinel-2 Benthic Habitat Classification Using Google Earth Engine Nugroho, Adhitya; Al Hakim, Muhammad Abdul Ghofur
Jurnal Kelautan Vol 18, No 3: Desember (2025)
Publisher : Department of Marine Sciences, Trunojoyo University of Madura, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/jk.v18i3.32389

Abstract

This study evaluates the optimal classification methodology and analyzes temporal changes over five years across four benthic habitat classes (Seagrass, Coral Reef, Rubble, and Sand) in the shallow waters of Ohoidertawun, Southeast Maluku, using Sentinel-2 imagery and the Google Earth Engine (GEE) platform. A comparative assessment of Machine Learning (ML) algorithms revealed that Random Forest (RF) demonstrated the best classification performance compared to Support Vector Machine (SVM), Classification and Regression Tree (CART), K-Nearest Neighbors (KNN), and Minimum Distance (MD) in benthic habitat mapping, achieving an Overall Accuracy of 0.856 and a Kappa Coefficient of 0.870. The classification results and accuracy assessment using the best-performing ML model from the 2025 Sentinel-2 imagery were used to analyze temporal changes relative to the 2020 Sentinel-2 data. Temporal analysis indicated a significant ecosystem shift, marked by a 52.41% increase in seagrass cover and a 31.46% decrease in coral reef area. These findings can serve as a recommendation for conservation site selection and urge stakeholders to help mitigate coral reef loss by utilizing the results of this research. The resulting benthic habitat map can serve as a reference for effective coastal resource management and blue carbon initiatives. Based on these findings, the Random Forest ML algorithm can be considered an optimal methodology for tropical benthic habitat mapping in the study area.Keywords: Benthic Habitat, Sentinel-2, Machine Learning, Google Earth Engine
Evaluasi Komponen Harmonik Pasang Surut Dengan Data Altimetri Pesisir Dan Tide Gauge Di Pesisir Barat Daya Sumatera Lase, Devianti Natalia; Nadzir, Zulfikar Adlan
Jurnal Kelautan Vol 18, No 3: Desember (2025)
Publisher : Department of Marine Sciences, Trunojoyo University of Madura, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/jk.v18i3.25780

Abstract

ABSTRAKPerkembangan teknologi akuisisi data menghasilkan alternatif dalam pengamatan pasang surut (pasut) selain menggunakan stasiun lapangan (tide gauge) yaitu satelit altimetri. Peningkatan ketelitian dari sistem retracker di pesisir menjadi parameter untuk meninjau tingkat kebaikan penggunaan satelit altimetri dalam pengamatan pasut sebagai pelengkap data tide gauge. Penelitian ini melakukan analisis harmonik dengan metode least square, menghasilkan nilai konstituen pasut utama yang digunakan dalam analisis kesesuaian data altimetri dibanding dengan tide gauge. Menggunakan dua stasiun di barat daya Sumatera, stasiun Krui menghasilkan amplitudo konstituen dominan K2 sebesar 0,034 m dan stasiun pasut Seblat dengan konstituen dominan K1 sebesar 0,035 m. Data altimetri Jason-1, Jason-2 dan Jason-3 pada pass 153 untuk data ALES dan GDR menghasilkan komponen pasut dominan P1 sebesar 0,283 m dan 0,354 m. Pass 077 data ALES dan GDR menghasilkan komponen pasut dominan P1 sebesar 0,532 m dan 0,313 m. Hasil analisis kesesuaian data antara satelit altimetri dan stasiun pasang surut diperoleh bahwa data ALES lebih baik di pesisir dengan jarak 10 km dari garis pantai. Sedangkan data GDR lebih baik untuk pesisir berjarak 10 km dari garis pantai. Disamping itu, apabila pengamatan dilakukan pada jarak yang lebih besar dari pesisir dapat menggunakan kombinasi dari kedua data tersebut.Kata Kunci: analisis harmonik, muka air laut, pesisir, satelit altimetri, stasiun pasutABSTRACTThe advancement of data acquisition technology has provided alternatives to tide gauge observations for sea-level monitoring, namely satellite altimetry. The accuracy improvement of retracking systems in coastal regions is a key parameter for evaluating the effectiveness of satellite altimetry as a complement to tide gauge data. This study applied harmonic analysis using the least squares method to obtain tidal constituents, which were then used to assess the consistency of altimetry data compared with tide gauges. Two tide gauge stations on the west coast of Sumatra were analyzed: Krui, where the dominant tidal constituent was K2 with an amplitude of 0.034 m, and Seblat, where the dominant constituent was K1 with an amplitude of 0.035 m. Altimetry data from Jason-1, Jason-2, and Jason-3 along pass 153 produced dominant P1 constituent with an amplitudes of 0.283 m (ALES) and 0.354 m (GDR), while pass 077 yielded P1 with amplitudes of 0.532 m (ALES) and 0.313 m (GDR). The results indicate that ALES data are more reliable within 10 km of the coastline, whereas GDR data perform better beyond 10 km. Furthermore, a combination of both datasets is recommended for improved tidal representation in the coastal zone of West Sumatra.Keywords: altimetry satellite, coastal zone, harmonic analysis, sea level, tide gauge
Pendekatan Metabarcoding eDNA untuk Mendeteksi Keanekaragaman Spons Laut: Sistematik Literatur Review dan Bibliometrik Analisis Daulay, Anggi Mayulina; Subhan, Beginer; Prasetyo, Andhika Prima; Bengen, Dietriech Geoffrey
Jurnal Kelautan Vol 18, No 3: Desember (2025)
Publisher : Department of Marine Sciences, Trunojoyo University of Madura, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/jk.v18i3.32404

Abstract

ABSTRAKPenelitian ini bertujuan menganalisis perkembangan, fokus tematik, dan arah riset terkait penggunaan environmental DNA (eDNA) metabarcoding untuk mendeteksi dan mengidentifikasi spons laut (Porifera). Pendekatan yang digunakan adalah systematic literature review (SLR) berbasis PRISMA dan analisis bibliometrik terhadap artikel terindeks Scopus tahun 2009–2025. Dari 116 publikasi awal, 42 artikel memenuhi kriteria inklusi dan dianalisis lebih lanjut menggunakan VOSviewer untuk mengidentifikasi tren publikasi, pola kolaborasi penulis-negara, serta struktur klaster kata kunci. Hasil menunjukkan peningkatan signifikan publikasi sejak 2017, dengan kontribusi terbesar berasal dari Britania Raya, Spanyol, dan Amerika Serikat. Analisis kata kunci menghasilkan lima klaster utama yang mencerminkan arah riset global, yaitu (1) genetika dan biodiversitas, (2) mikrobioma dan metagenomik, (3) ekologi terumbu karang, (4) invertebrata laut, serta (5) lingkungan ekstrem. Meskipun eDNA metabarcoding terbukti sensitif untuk mendeteksi komunitas spons, tantangan utama yang ditemukan mencakup keterbatasan marker gen yang belum universal serta kelengkapan basis data taksonomi yang masih rendah. Novelty penelitian ini terletak pada penggabungan SLR dan bibliometrik secara khusus pada spons laut, sehingga mampu mengungkap kesenjangan geografis, keterbatasan metodologis, serta menawarkan rekomendasi strategis berupa standardisasi protokol, penguatan basis data referensi lokal, dan perluasan kolaborasi internasional, terutama di wilayah megabiodiversitas seperti Indonesia.Kata Kunci: eDNA, metabarcoding, Porifera, bibliometric, keanekaragaman hayati.ABSTRACTThis study analyzes the development, thematic focus, and research direction of environmental DNA (eDNA) metabarcoding applied to the detection and identification of marine sponges (Porifera). A systematic literature review (SLR) following PRISMA and a bibliometric analysis of Scopus-indexed publications from 2009–2025 were conducted. From an initial 116 records, 42 articles met the inclusion criteria and were analyzed using VOSviewer to identify publication trends, author–country collaborations, and keyword cluster structures. Results show a substantial increase in publications since 2017, with major contributions from the United Kingdom, Spain, and the United States. Keyword analysis revealed five major thematic clusters: (1) genetics and biodiversity, (2) microbiome and metagenomics, (3) coral reef ecology, (4) marine invertebrates, and (5) extreme environments. Although eDNA metabarcoding demonstrates high sensitivity for sponge detection, key challenges include non-universal genetic markers and incomplete taxonomic reference databases. The novelty of this study lies in integrating SLR and bibliometric approaches specifically for marine sponges, allowing the identification of geographic gaps, methodological limitations, and providing strategic recommendations for protocol standardization, the development of local reference databases, and enhanced international collaboration, particularly in megabiodiverse regions such as Indonesia.Keywords: eDNA, metabarcoding, Porifera, bibliometric analysis, biodiversity.
Wave-generated Forecast in Weda Bay, Central Halmahera, Based on Wind and Satellite Data Aprilia, Jesikha Dwi; Lessy, Mohammad Ridwan; Nagu, Nani
Jurnal Kelautan Vol 18, No 3: Desember (2025)
Publisher : Department of Marine Sciences, Trunojoyo University of Madura, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/jk.v18i3.31688

Abstract

ABSTRACTOcean waves are an important oceanographic parameter to analyse due to their role in ocean circulation, marine transportation, and coastal management. This research focused on forecasting the height and duration of significant waves in the Weda Bay, utilizing wind data from meteorological stations and altimetry satellite data. The data utilized comprised maximum wind speed and direction records spanning ten years, from 2011 to 2021, collected from two meteorological stations: Baabullah Station in Ternate and Gamar Malamo in Galela. Simultaneously, AVISIO Altimetry satellite data is retrieved from a website that aligns with the temporal measurement range of meteorological station data. The analysis phase initiates with wind speed correction, effective fetch calculation, and high and periodic wave forecasting utilizing Excel software, while satellite data is examined using ArcGIS software. The prediction results for wave height and period indicate that data from the Baabullah station show a significant wave height ranging from 0.00 to 2.33 meters and a significant wave period from 0.09 to 5.07 seconds. In contrast, data from the Gamar Malamo station reveal a significant wave height ranging from 0.02 to 4.28 meters and a significant wave period from 0.20 to 6.85 seconds.  The study indicates that BMKG and satellite data produce consistent wave height calculationsKeywords: Wave Forecasting, Sea Waves, Weda Bay, Altimetry Satellite
Karakteristik Massa Air Berdasarkan Data Argo Float Di Laut Banda Zahara, Asha Aulia; Hartanto, Mohammad Tri; Balbeid, Nabil; Atmadipoera, Agus Saleh; Nurjaya, I Wayan; Naulita, Yuli
Jurnal Kelautan Vol 18, No 3: Desember (2025)
Publisher : Department of Marine Sciences, Trunojoyo University of Madura, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/jk.v18i3.29534

Abstract

ABSTRAKPenelitian ini bertujuan untuk mengkaji karakteristik massa air di Laut Banda dengan memanfaatkan data dari Argo Float. Sebagai laut terdalam yang krusial bagi dinamika Arus Lintas Indonesia (ARLINDO), monitoring in-situ hingga kedalaman ribuan meter di wilayah ini menjadi tantangan. Oleh karena itu, Argo Float merupakan instrumen krusial untuk menyediakan data suhu, salinitas, dan densitas secara real-time. Penelitian ini menggunakan 108 profil Argo Float (WMO ID_6901747) terkini untuk memetakan massa air utama Laut Banda secara musiman yang jarang dilakukan di studi-studi sebelumnya. Hasil penelitian mengungkap bahwa massa air di Laut Banda terdiri dari beberapa tipe utama, yaitu North Pacific Subtropical Water (NPSW), South Pacific Subtropical Lower Thermocline Water (SPLTW), North Pacific Intermediate Water (NPIW), dan Antarctic Intermediate Water (AAIW). Variasi suhu, salinitas, dan densitas menunjukkan bahwa pada musim timur (September), nilai yang terukur berada dalam rentang 4,6 – 27,5°C; 34,2 – 34,6 PSU; dan 21,9 – 27,4 kg/m³. Sementara itu, pada musim barat (Maret) pada kedalaman yang sama, kisarannya adalah 4,6 – 29,9°C; 32,6 – 34,6 PSU; dan 20,1 – 27,4 kg/m³. Frekuensi Brunt-Vaisala yang terukur selama musim timur berkisar antara -2,3 hingga 22 siklus per jam, sedangkan pada musim barat berkisar antara -2,6 hingga 32,2 siklus per jam, dengan distribusi yang berbeda antara kedua musim tersebut.Kata Kunci: Temperatur, Salinitas, Densitas, Argo Float, Laut BandaABSTRACTThis study aims to examine the characteristics of water masses in the Banda Sea using data obtained from Argo Floats. As the deepest sea basin that plays a crucial role in the dynamics of the Indonesian Throughflow (ITF), conducting in-situ monitoring down to thousands of meters depth in this region presents significant challenges. Therefore, Argo Floats serve as essential instruments for providing real-time temperature, salinity, and density data. This research utilizes 108 recent Argo Float profiles (WMO ID_6901747) to map the seasonal distribution of the major water masses in the Banda Sea, an approach that has been rarely undertaken in previous studies. The results reveal that the water masses consist of several key types, namely North Pacific Subtropical Water (NPSW), South Pacific Subtropical Lower Thermocline Water (SPLTW), North Pacific Intermediate Water (NPIW), and Antarctic Intermediate Water (AAIW). Variations in temperature, salinity, and density indicate that during the east monsoon (September), the measured ranges are 4.6–27.5°C, 34.2–34.6 PSU, and 21.9–27.4 kg/m³, respectively. Meanwhile, during the west monsoon (March) at similar depths, the ranges are 4.6–29.9°C, 32.6–34.6 PSU, and 20.1–27.4 kg/m³. The Brunt–Väisälä frequency measured during the east monsoon ranges from –2.3 to 22 cycles per hour, while during the west monsoon it ranges from –2.6 to 32.2 cycles per hour, exhibiting distinct seasonal distribution patterns. Keywords: Temperature, Salinity, Density, Argo Float, Banda Sea
Pemodelan Gelombang Laut Di Pantai Kijing Kabupaten Mempawah Dengan Pendekatan Komputasi Dinamika Fluida Okviani, Nadya; Putra, Yoga Satria; Ardianto, Randy; Muliadi, Muliadi; Adriat, Riza
Jurnal Kelautan Vol 18, No 3: Desember (2025)
Publisher : Department of Marine Sciences, Trunojoyo University of Madura, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/jk.v18i3.27496

Abstract

ABSTRACTSimulation and prediction of extreme waves are important issues in disaster mitigation and coastal infrastructure governance. Kijing Beach is one of the beaches in the West Kalimantan region, Mempawah, which often experiences high wave phenomena, one of which occurred on July 14, 2021, at 02.00 WIB which resulted in the collapse of the connecting road between the pier and the Kijing Port. Information on the mechanism of the occurrence of this large wave is quite important to study in more depth. This research applies a computational approach to fluid dynamics with Delft3D software using input data in the form of tidal components from TPXO 08, surface pressure wind components u and v from the European Center for Medium-Range Weather Forecasts (ECMWF), and bathymetry data from the General Bathymetric Chart of the Oceans (GEBCO). Wave modeling has been successfully carried out, which is validated using tidal data from the Automatic Weather Station (AWS) from the Pontianak Maritime Meteorological Station by showing the percentage value of the Mean Absolute Error (MAE) of 0.089. The value is included in the small category, and the correlation coefficient value is in a very strong category with a value of 0.96. Significant wave height analysis has also been successfully carried out by analyzing sampling points and spatial models, which show wave height results around Kijing Port ranging from 0.03 m to 0.21 m, and the dominant direction moves from the south to the northwest, north, and northeast.Keywords: Computational Fluid Dynamics, Delft3D, Kijing Beach, Ocean waves, Significant wave height.ABSTRAKSimulasi dan prediksi gelombang ekstrem merupakan suatu isu penting dalam melakukan mitigasi bencana dan tata kelola infrastruktur pesisir pantai. Pantai Kijing merupakan salah satu pantai di wilayah Kalimantan Barat, Mempawah yang sering mengalami fenomena gelombang tinggi, salah satunya terjadi pada tanggal 14 Juli 2021 pukul 02.00 WIB yang mengakibatkan jalan penghubung antara dermaga dan Pelabuhan Kijing roboh. Informasi mekanisme terjadinya gelombang besar ini cukup penting dikaji secara lebih mendalam. Penelitian ini menerapkan pendekatan komputasi dinamika fluida dengan software Delft3D menggunakan data input berupa komponen pasang surut dari TPXO 08, tekanan permukaan komponen angin u dan v dari European Centre for Medium-Range Weather Forecasts (ECMWF), dan data batimetri dari General Bathymetric Chart of the Oceans (GEBCO). Pemodelan gelombang telah berhasil dilakukan yang divalidasi menggunakan data pasang surut dari Automatic Weather Station (AWS) dari Stasiun Meteorologi Maritim Pontianak dengan menunjukkan nilai persentase kesalahan rata-rata absolut atau Mean Absolute Error (MAE) sebesar 0,089 dan nilainya tersebut masuk pada kategori kecil, kemudian untuk nilai koefisien korelasi masuk pada kategori yang sangat kuat dengan nilai sebesar 0,96. Analisis tinggi gelombang signifikan juga telah  berhasil  dilakukan  dengan  menganalisis  sampling point dan spasial model yang menunjukkan hasil tinggi gelombang di sekitar Pelabuhan Kijing berkisar antara 0,03 m hingga 0,21 m dan arahnya dominan bergerak dari arah selatan menuju ke barat laut, utara dan timur laut.Kata kunci: Delft3D, Gelombang laut, Komputasi dinamika fluida, Pantai Kijing, Tinggi gelombang signifikan.

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