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Agus Alim Hakim
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COJ (Coastal and Ocean Journal)
Published by Institut Pertanian Bogor
ISSN : -     EISSN : 25498223     DOI : https://doi.org/10.29244/COJ.5.1
Core Subject : Agriculture, Social,
Agriculture, Biological Sciences & Forestry Environmental Science Social Sciences
COJ (Coastal and Ocean Journal) memiliki ISSN Online: 2549-8223 adalah Jurnal yang dikelola oleh Pusat Kajian Sumberdaya Pesisir dan Lautan, Lembaga Penelitian dan Pengabdian Kepada Masyarakat (LPPM), IPB University, dengan tujuan menyebarluaskan informasi tentang perkembangan ilmiah bidang pengelolaan wilayah pesisir dan lautan di Indonesia. Yang dimaksud dengan perkembangan ilmiah, pengelolaan, inovasi dan teknologi bidang pesisir dan lautan di Indonesia antara lain: Pengelolaan Perikanan, Pengolahan Hasil Laut, Bioteknologi Kelautan, Pengelolaan Sumberdaya Perairan, Pengelolaan Sumberdaya Pesisir dan Lautan, Pemetaan Wilayah Pesisir dan Laut, Hukum dan Sosial Ekonomi Wilayah Pesisir dan Laut, Sistem Sosial dan Ekologi Pesisir dan Lautan, Jasa Ekosistem Pesisir dan Lautan, Konservasi Sumberdaya Pesisir dan Laut serta Pengendalian Pencemaran Lingkungan Pesisir dan Lautan. Berdasarkan Surat Keputusan ISSN LIPI bahwa Coastal and Ocean Journal telah terdaftar dalam ISSN online dengan Nomor SK no. 0005.25498223/JI.3.1/SK.ISSN/2017.03 - 8 Maret 2017. Naskah yang masuk ke COJ akan dicek mengenai pedoman penulisannya oleh Administrasi, apabila sudah sesuai akan direview oleh 1 (satu) orang Dewan Penyunting dan 1 (satu) orang Mitra Bestari (Peer-Reviewer) berdasarkan penunjukan dari Ketua Dewan Penyunting. Keputusan diterima atau tidaknya suatu naskah menjadi hak dari Ketua Dewan Penyunting berdasarkan atas rekomendasi dari Dewan Penyunting dan Mitra Bestari. Jurnal COJ terbit 2 kali dalam 1 tahun (Juni dan Desember) Focus and Scope Pengelolaan Perikanan Pengolahan Hasil Laut Bioteknologi Kelautan Pengelolaan Sumberdaya Perairan Pengelolaan Sumberdaya Pesisir dan Lautan Pemetaan Wilayah Pesisir dan Lautan Kebijakan dan Ekonomi Wilayah Pesisir dan Lautan Sistem Sosial dan Ekologi Pesisir dan Lautan Jasa Ekosistem Pesisir dan Lautan Konservasi Sumberdaya Pesisir dan Lautan Pengendalian Pencemaran Lingkungan Pesisir dan Lautan
Arjuna Subject : Ilmu Lingkungan (semua ketegori) - Ilmu Lingkungan (Lain-Lain)
Articles 92 Documents
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Penilaian Multi Bahaya Pesisir di Daerah Muara Sungai Randangan, Teluk Tomini, Indonesia Djuraini, Moh. Fahry
Coastal and Ocean Journal (COJ) Vol 9 No 1 (2025): COJ (Coastal and Ocean Journal)
Publisher : Pusat Kajian Sumberdaya Pesisir dan Lautan IPB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/coj.v9i1.64113

Abstract

This study aims to provide a preliminary assessment of coastal hazards in the Randangan River Mouth Coastline, Tomini Bay, Indonesia, using the Coastal Hazard Wheel (CHW) framework. The assessment focuses on key parameters such as geomorphology, wave exposure, tidal range, vegetation cover, sediment balance, and storm climate across a 14.46 km coastal stretch. Results reveal high levels of vulnerability, with ecosystem disruption, gradual inundation, and coastal erosion each posing very high to high risks along 8.35 km of the coastline, particularly in sediment plains and deltaic zones with minimal vegetation. Saltwater intrusion affects nearly the entire coastline (13.91 km) at moderate risk, while flooding presents a high risk across 13.54 km, indicating the limited buffering capacity of existing natural features. Despite data limitations, the CHW approach effectively identifies and maps multi-hazard exposure, providing a valuable tool for early-stage planning. The findings underscore the need for integrated coastal zone management, including ecosystem-based interventions and improved data collection, to support long-term resilience and adaptive strategies in vulnerable coastal settings.
inggris Noerdin Basir; Hiraishi Tetsuya
Coastal and Ocean Journal (COJ) Vol 9 No 2 (2025): COJ (Coastal and Ocean Journal)
Publisher : Pusat Kajian Sumberdaya Pesisir dan Lautan IPB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/coj.v9i2.313896

Abstract

While the XBeach model has been validated for complex coastal processes under storm conditions, its performance in predicting hydrodynamics and morphodynamic changes under controlled, small-scale regular wave scenarios—a critical gap for foundational calibration and understanding—remains less documented. This study addresses this gap by rigorously validating XBeach's capability to simulate regular wave propagation and the consequent coastal erosion in a controlled laboratory environment. The experiment was conducted in a 30 m flume at Kyoto University's UJIGAWA laboratory, using a piston-type wavemaker to generate nine regular wave cases (wave heights: 1.68–3.3 cm; periods: 0.83 s and 1.205 s). Model accuracy was quantitatively assessed using the Mean Absolute Error (MAE). The results demonstrate that XBeach proficiently simulates both hydrodynamic and morphodynamic processes. The validation for significant wave height yielded an MAE of 0.07, while the validation for the eroded area yielded an MAE of 0.05 (5%). Both MAE values are below the 10% sufficiency threshold, confirming the model's reliability in predicting wave transformation and erosion magnitude under regular wave forcing. This study provides a foundational validation benchmark, enhancing confidence in applying XBeach for coastal erosion prediction in scenarios dominated by monochromatic wave conditions.
Economic Impact Analysis of Reclamation Activities on Rampus (Gillnet) Fishery in Kaliadem, Muara Angke, North Jakarta Kusumastanto, Tridoyo; Sobirin, Akhmad; Nababan, Benny Osta; Indah, Mega Natasha
Coastal and Ocean Journal (COJ) Vol 9 No 2 (2025): COJ (Coastal and Ocean Journal)
Publisher : Pusat Kajian Sumberdaya Pesisir dan Lautan IPB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/coj.v9i2.324636

Abstract

The Jakarta Bay reclamation has impacted capture fisheries, such as rampus (gillnet) fishermen in Kaliadem. This study aims to analyze the economic impacts of reclamation including its adaptation strategies, fishing business unit feasibility, fishermen’s welfare, and post-reclamation policy options. Data were collected through surveys and a census and analyzed using analyses of spatial characteristics, feasibility, Fishermen Exchange Rate (NTN), qualitative description, and policy alternatives. The results indicate that the primary fishing grounds of rampus fishermen are directly affected by reclamation. The fishing units remain viable both before and after reclamation. Fishermen experienced a 41.86% decrease in income per trip, a 59.19% reduction in crew wages per trip, and a 38.16% increase in fuel consumption per trip. The Net Present Value (NPV) decreased from IDR 456,251,850 before reclamation to IDR 141,900,795 after reclamation. The Net B/C ratio dropped from 4.43 to 2.58, the Internal Rate of Return (IRR) declined to 30.22%, and the payback period extended by 1.13 years. NTN analysis showed a decline of 0.22 or 22.44% compared to pre-reclamation conditions. Adaptation strategies involve relocating fishing grounds and continuing fishing activities. Proposed alternative policies include increasing vessel size, providing fuel quota subsidies, and fisher relocation.
Bahasa Inggis Lisa Ipambonj; Mohammad Mukhlis Kamal; Taryono Taryono; Ralph Mana
Coastal and Ocean Journal (COJ) Vol 9 No 2 (2025): COJ (Coastal and Ocean Journal)
Publisher : Pusat Kajian Sumberdaya Pesisir dan Lautan IPB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/coj.v9i2.363893

Abstract

This study examines community perceptions and involvement in coral reef conservation in Awaiama Village, Milne Bay Province, Papua New Guinea, through a social-ecological framework. Fieldwork in October 2024 integrated coral reef assessments with semi-structured interviews involving local stakeholders. Results indicate that coral reefs are important to livelihoods, food security, and cultural heritage. Despite this dependency, the reefs are increasingly threatened by overfishing, destructive fishing practices, and the impacts of climate change. The community exhibits limited ecological awareness and continues relying on unsustainable fishing methods. Although minor signs of reef recovery were recorded in some areas, community participation in formal conservation initiatives remains minimal. Traditional governance structures, such as clan meetings, play a more prominent role in local resource management. However, there is strong support for reef protection and recognition of the value in integrating traditional ecological knowledge with science-based management strategies. The findings highlight the need for co-management approaches tailored to local socio-economic contexts and emphasize education, sustainable practices, and collaborative governance to ensure long-term reef resilience.
Characteristics of Marine Mammal Habitat in Bintuni Bay Ari Gunawan Wardhana; Yonvitner, Yonvitner; Akmal, Surya Gentha
Coastal and Ocean Journal (COJ) Vol 9 No 2 (2025): COJ (Coastal and Ocean Journal)
Publisher : Pusat Kajian Sumberdaya Pesisir dan Lautan IPB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/coj.v9i2.363696

Abstract

Bintuni Bay is one of the most important areas in Eastern Indonesia with high ecological potential, especially for marine mammals. This study aims to observe the presence of marine mammals and analyse water quality characteristics in Bintuni Bay to understand the environmental dynamics that affect the presence of marine mammals. Marine mammal observations were conducted along a predetermined pathway and seawater quality sampling was conducted at 16 points. Environmental parameters analysed included temperature, salinity, turbidity, dissolved oxygen (DO), chlorophyll-a and depth. Parameter determination was based on previous studies of key environmental parameters for marine mammal habitat and available data. Results showed that marine mammals in Bintuni Bay were found in the turbidity interval of 0.2 -16.7 NTU, temperature 24.7-27.4 0C, salinity 21.9 - 29.3 ppt, dissolved oxygen 4.10 - 6.30 mg/L, chlorophyll-a 5.38-49.10 µg/L and depth 10-51 m. This data can be utilized to conduct better environmental management for marine mammals as economic activities in Bintuni Bay increase in the future.
Analisis Perbandingan Pemetaan Ekosistem Bentik Menggunakan Allen Coral Atlas dan Sentinel-2 di Kepulauan Pagai Syarifudin Nur; Susanna Nurdjaman; Muhammad Abia Saefulloh
Coastal and Ocean Journal (COJ) Vol 9 No 2 (2025): COJ (Coastal and Ocean Journal)
Publisher : Pusat Kajian Sumberdaya Pesisir dan Lautan IPB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/coj.v9i2.363710

Abstract

Benthic ecosystem is a crucial component of coastal ecosystems, making its protection essential for maintaining ecosystem health. This study presents a comparative analysis of benthic mapping in the Pagai Islands, West Sumatra Province. It utilizes two different satellite imagery sources: the Allen Coral Atlas, derived from Planet Labs' Dove satellites with a spatial resolution of 3-5 meters, and Sentinel-2 imagery from ESA's Copernicus program, with a resolution of 10 meters, both acquired from 2024. The Allen Coral Atlas data were processed using Google Earth Engine and visualized in QGIS, while Sentinel-2 data were processed in Snap and QGIS, covering the same period. In situ validation used secondary field data from six stations across North and South Pagai Islands. This data was used to validate seagrass, mangrove and coral reef presence and identify species in their natural habitats. The analysis revealed strong similarity between both maps, particularly for seagrass habitats, though minor discrepancies occurred in cloud-covered and sediment-affected areas. This highlights the reliability of both datasets for benthic mapping, with greater potential than simple validation. They can be applied to track annual fluctuations in seagrass distribution, monitor mangrove extent and recovery, and evaluate coral reef area and degradation. Such analyses provide robust support for ecological research and management in the dynamic Pagai Islands.
The ANALISIS HUMAN ERROR PADA PENGOPERASIAN MESIN PENGGERAK KAPAL PENANGKAP IKAN DI BITUNG SULAWESI UTARA Demeianto, Bobby; Siahaan, Juniawan Preston; Priharanto, Yuniar E.; Yaqin, Rizqi Ilmal; Tumpu, Mula; Faqih, M. Bil; Pujianto, Andreas; Nurfauzi, Akhmad; Abrori, Muhammad Zaki Latif
Coastal and Ocean Journal (COJ) Vol 7 No 2 (2023): COJ (Coastal and Ocean Journal)
Publisher : Pusat Kajian Sumberdaya Pesisir dan Lautan IPB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/coj.v7i2.50284

Abstract

Pengoperasian mesin penggerak kapal cukup kompleks, memerlukan keahlian dan keterampilan yang layak untuk dapat mengoperasikan mesin. banyaknya kesalahan dalam mengoperasikan mesin merupakan hal yang mungkin terjadi. Tujuan penelitian ini menganalisis terjadinya kesalahan mengoperasikan mesin penggerak kapal yang disebabkan oleh human eror. Untuk mendapatkan hasil yang valid, pengamatan kru ketika mengoperasikan mesin dilakukan, setiap pekerjaan di breakdown untuk mendapatkan pekerjaan spesifik secara detail dengan Hierarkikal task analisis. Data yang dihasilkan dengan Systematic Human Error Reduction and Prediction Approach (SHERPA) dianalisis secara komprehensif. Hasilnya di dapatkan 21 pekerjaan spesifik dengan kriteria pemeriksaan, aksi dan komunikasi. Human error yang terjadi pada profil risiko rendah dan sedang. Rekomendasi diberikan untuk memperbaiki profil risiko. Hasil penelitian ini memberikan dampak yang signifikan untuk mengatasi permasalahan pengoperasian mesin yang disebabkan kesalahan manusia.
THE GREEN PORTS FUTURE KNOWLEDGE MAP AND TREND Sri Rahardjo; Sinta Hasriningtyas; Nurdin Ahmadi
Coastal and Ocean Journal (COJ) Vol 7 No 2 (2023): COJ (Coastal and Ocean Journal)
Publisher : Pusat Kajian Sumberdaya Pesisir dan Lautan IPB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/coj.v7i2.52124

Abstract

The purpose of this study is to track the emergence of research related to green ports over time and determine the knowledge map and trends of green port research topics in the future using thematic map bibliometric analysis. This study also provides an overview of the researchers and contributors of research countries in green port research globally. This research provides a comprehensive bibliometric analysis of historical developments and current trends in green port research, by examining 462 articles published from 1991-2023 on the Scopus database. This research uses R studio Cloud bibliometric analysis and biblioshiny package. It was found that there are three phases in green port research, namely the initial stagnation phase (1991-2006), infant growth (2007-2015), and expanding phase (2016-2022), the number of articles increased quite rapidly in the third phase until now. This research also highlights related to authors, contributor countries and it was found that the country of China contributed the most contributor authors compared to other countries, this is because China is a country that places many container ports as the top 10 largest container ports in the world, with a total market share reaching 70% of the global. From this analysis, it is found that the knowledge map and the direction of future topics related to green ports are “sustainable development”, “port development”, “port operation”, “carbon emissions” and “renewable energy resources”, besides that it is also found that there is a direction of the current green port and “smart port” research trends. So, it can be recommended that in the future these topics will be very relevant to develop, the themes of research themes needed include alternative strategies in net zero emission (NZE) in ports in the operational and development aspects of the port.
A Comparative Study of Coral Reef Cover Percentage Between Shallow and Deep Depths at Pramuka Island, Kepulauan Seribu Ratna Clara Laksmitha; Muhammad Farhan Haidar Rahman; Try Feby Innocentia; Imam Fatoni; Ridha Rahman; Firsta Kusuma Yudha
Coastal and Ocean Journal (COJ) Vol 10 No 1 (2026): COJ (Coastal and Ocean Journal)
Publisher : Pusat Kajian Sumberdaya Pesisir dan Lautan IPB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/coj.v10i1.71414

Abstract

Indonesia possesses one of the largest coral reef resources in the world, representing approximately 14% of global reef coverage, and these reefs are highly vulnerable to environmental changes and human activities, particularly in densely populated areas like Pramuka Island, Kepulauan Seribu. This research was conducted to evaluate reef conditions around Pramuka Island through an analysis of coral cover at two depth ranges, namely shallow waters (3–5 m) and deeper reef zones (8–10 m). Data collection utilized Line Intercept Transect (LIT) method at six stations, with three transect replications at each depth. The results showed a significant difference in live coral cover between shallow and deep depths (p=0.018). The highest cover and best condition (very good category) were found at Panggang Cultivation Area, linked to ongoing coral cultivation and transplantation activities. Reef conditions among the observation sites ranged from poor to very good, reflecting considerable spatial variation in coral ecosystem quality, with the dominant lifeform being Coral Massive (CM), indicating high resistance to local pressures.
Total Suspended Solids Dynamics in Tin Mining Exploitation Areas in Northeastern Coastal Waters of Bangka Island: A Remote Sensing Approach Filialdi Nur Hidayat; Taryono Taryono; Fery Kurniawan
Coastal and Ocean Journal (COJ) Vol 10 No 1 (2026): COJ (Coastal and Ocean Journal)
Publisher : Pusat Kajian Sumberdaya Pesisir dan Lautan IPB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/coj.v10i1.71899

Abstract

The dynamics of total Suspended Solids (TSS) are a characteristic of water quality that can be observed over time, especially in areas where water is used for extractive purposes, such as tin mining areas in Northeastern Coastal Waters of Bangka Island. This study describes the TSS dynamics that occurred in those areas which are covered by Landsat 8 Imagery (Path123/Row 061). This is interesting because the research location is a tin mining site whose exploitation activities have an impact on Total Suspended Solids in the surrounding area. The method used in this study was multispectral analysis of satellite imagery. The algorithm used was developed by Laili et al. (2015). The results show that during the 10-year study period, the dynamics of Total Suspended Solids on the Northeastern Coast of Bangka Island from 2015 to 2024 did not experience significant changes. The annual average values of Total Suspended Solids ranged from 18.48 mg/L to 18.74 mg/L. However, there is a significant difference (p-value of 0.00 on T-Test) between Total Suspended Solids levels within the tin mining area (19.15 mg/L) and those outside the tin mining area (18.64 mg/L).

Page 9 of 10 | Total Record : 92

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