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Depik Jurnal Ilmu-Ilmu Perairan, Pesisir, dan Perikanan
Published by Universitas Syiah Kuala
ISSN : 20897790     EISSN : 25026194     DOI : 10.13170/depik
Core Subject : Science, Education, Engineering,
Earth & Planetary Sciences Education Engineering
Depik Jurnal Ilmu-Ilmu Perairan, Pesisir dan Perikanan is a peer review international journal, this journal is publishing high-quality articles in aquatic sciences and fisheries in general. The aim of the journal is to publish and disseminate the current or new findings of the research, and give a significant contribution to the development of fisheries and aquatic sciences in several topics, but not limited to: Fisheries (Aquaculture, Capture Fisheries, Fish Processing) Aquatic Ecology (Freshwater, Marine, and Brackishwater) Aquatic Biology (Fish, Mollusk, Crustacean, Plankton, Coral reefs) Oceanography.
Arjuna Subject : Ilmu Bumi dan Planet (semua kategori) - Ilmu Bumi dan Planet (Lain-Lain)
Articles 563 Documents
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Analisis komoditas unggulan perikanan budidaya Kabupaten Pidie Jaya Farok Afero; Muhammad Nazir; Arie Muhardy
Depik Vol 4, No 2 (2015): AUGUST 2015
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.4.2.2401

Abstract

Abstract. Snapper (Lates calcarifer), grouper (Epinephelus coioides), tiger shrimp (Penaeus monodon), vannamei shrimp (Litopenaeus vannamei) and tilapia (Oreochromis niloticus) are leading commodity worthly cultivated in Pidie Jaya. Bandar Baru and Tringgadeng an appropriate areas for black tiger shrimp while Jangka Buya and Ulim approriate areas for vannamei cultivation. AHP analysis showed black tiger shrimp is top priority based on the economic value while vannamei shrimp is top priority based on enterprise sustainability. Financial analysis of snapper, grouper, black tiger shrimp, vannamei shrimp and tilapia farming generated positive cash flow and NPV, IRR 100%, the ratio of benefit to cost of production 1,30 and payback period of investment costs   1 year, thus demonstrating the feasibility of cultivation of these leading commodities. Vannamei shrimp cultivation showed positive prospect as long the market offers premium price. Grouper and snapper had a positive outlook because high demand of high-quality fish in the international market.Keywords: Leading commodity; financial analysis; aquaculture; Pidie Jaya Abstrak. Komoditas kakap (Lates calcarifer), kerapu (Epinephelus coioides),udang windu (Penaeus monodon), udang vannamei (Litopenaeus vannamei) dan nila (Oreochromis niloticus) adalah komoditas unggulan yang layak dibudidaya di Kabupaten Pidie Jaya. Bandar Baru dan Tringgadeng merupakan kawasan yang layak untuk pengembangan komoditas udang windu sedangkan Jangka Buya dan Ulim layak untuk pengembangan komoditas udang vannamei. Analisis AHP menunjukkan komoditas udang windu menjadi prioritas utama untuk dikembangkan berdasarkan nilai ekonomi sedangkan udang vannamei menjadi prioritas utama berdasarkan keberlanjutan usaha. Analisis indikator keuangan budidaya kakap, kerapu, udang windu, vannamei dan nila menunjukkan usaha budidaya komoditas unggulan menghasilkan arus kas kumulatif dan NPV positif, nilai  IRR diatas 100%, rasio keuntungan terhadap biaya produksi diatas 1,30 serta periode pengembalian biaya investasi 1 tahun, sehingga menunjukkan kelayakan usaha budidaya komoditas unggulan tersebut. Budidaya udang vannamei menunjukkan prospek yang positif selama harga yang ditawarkan oleh pasar masih tinggi. Ikan kerapu dan kakap memiliki prospek yang positif karena masih banyaknya permintaan ikan berkualitas tinggi di pasar internasional.Kata kunci: Komoditas unggulan; Analisa ekonomi; Perikanan Budidaya; Pidie Jaya
Potensi sinbiotik lokal terhadap respon imun non spesifik udang vaname (Litopenaeus vannamei) Indri Saputri Ramadhani; Esti Harpeni; Tarsim Tarsim; Limin Santoso
Depik Vol 6, No 3 (2017): December 2017
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.6.3.7613

Abstract

The aims of the study were to examine the exact percentage of prebiotics in sinbiotics, administered through feed, so as to enhance nonspecific immune responses in white shrimp. The sweet potato extract was used as prebiotic, combined with local isolated Bacillus sp. D2.2 as a probiotic applied simultaneously as a synbiotic. The feed was treated with 0% sinbiotic treatment (treatment A / control), 0% prebiotic and 6% probiotics (B treatment), 2% prebiotic and 6% probiotics (treatment C), 4% prebiotics and 6% probiotics (treatment D). Examination of nonspecific immune responses to shrimp included total hemocyte count (THC), phagocytosis activity (AP), phagocytosis index (IP), phenoloxidase activity (PO), and superoxide dismutase activity (SOD). Observation of the non-specific immune response of vaname shrimp after treatment showed that treatment C was the best prebiotic  to increase non-specific immune response in vaname shrimp.Penelitian ini bertujuan untuk mempelajari persentase prebiotik yang tepat dalam sinbiotik, yang diberikan melalui pakan, sehingga dapat meningkatkan respon imun nonspesifik pada udang vaname. Dalam penelitian ini digunakan ekstrak tepung ubi jalar sebagai prebiotik, dikombinasikan dengan isolat lokal Bacillus sp. D2.2 sebagai probiotik yang diaplikasikan secara bersamaan sebagai sinbiotik. Pakan yang diberikan adalah pakan dengan perlakuan 0% sinbiotik (perlakuan A/kontrol), 0% prebiotik dan 6% probiotik (perlakuan B), 2% prebiotik dan 6% probiotik (perlakuan C), 4% prebiotik dan 6% probiotik (perlakuan D). Pemeriksaan respon imun nonspesifik pada udang meliputi total hemocyte count (THC), aktivitas fagositosis (AF), indeks fagositosis (IF), aktivitas phenoloxidase (PO), dan aktivitas superoxide dismutase (SOD). Pengamatan pada respon imun non spesifik udang vaname setelah diberi perlakuan menunjukan bahwa perlakuan C merupakan persentase prebiotik terbaik untuk meningkatkan respon imun non spesifik pada udang vaname.
Kandungan logam berat dalam sedimen di Perairan Teluk Wawobatu, Kendari, Sulawesi Tenggara Edward .
Depik Vol 3, No 2 (2014): August 2014
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.3.2.1537

Abstract

Abstract. Examination of heavy metals content in sediment ofWawobatu  Bay Waters, Kendari wasconducted in June2011. Sediment sampleswere collectedusing gravitycoreat 5research stations. Heavymetals content weremeasuredusingAtomic Absorption Spectrophotometer (AAS). The purpose of this research wasto examine the heavy metals content in sediment and to predict the quality of sediment based on index analysis approach (geoaccumulation index and pollution load index). The results showed that Pb was rangedfrom 3.704 pp to 21.892 ppm, Cd was 0.784-1,385 ppm, Cu was 3,451-12,193 ppm, and 24.838 ppm, to 69.973 ppm and 37.289 ppm to 72.329 ppm for Zn and Ni, respectively. It is concluded that the content of the theseheavy metals were lower compared to threshold value stated by The Stated Ministry Office for Life Environment 2004 and Ontario sediment Guideline 2008. In general the heavy metals content in Station 4 was higherthanthe other stations. This iscaused by the differences insediment texture in each station, whilestation 4 is situated  in estuary and it has a black clayssediment texture. In addition, the content of Ni  washigher than the others examined heavy metals.Based on I-geo values that thesediment in this waters is categorized asunpolluted  by Pb, Cu, Zn, and Ni (I-geo0), and moderate polluted category by Cd (1I-geo2). In addition,based on PLI values, sediments of Wawobatu bay was unpolluted by Pb, Cu, Zn,  Ni and Cd.Keywords: Heavy metals; sediments; Wawobatu Bay; Kendari Abstrak. Pengamatan kandungan logam berat dalam sedimen diPerairanTeluk Wawobatu, Kendari telah dilakukan pada bulan Juni 2011. Contoh sedimen diambil dengan menggunakan gravity core pada 5 stasiun penelitian. Kandungan logam berat diukur dengan menggunakan Spektrofotometer Serapan Atom (SSA). Tujuan  penelitian ini adalah untuk mengetahui kandungan logam berat dalam sedimen serta memprediksi kualitas sedimen berdasarkan pendekatan analisis indeks (Indeks geoakumulasi dan  Indeks Beban Pencemaran).Hasilnya menunjukkan, kandungan Pb berkisar  3,704-21,892 ppm, Cd  0,784-1,385 ppm, Cu  3,451-12,193 ppm, Zn  24,838-69,973 ppm, dan Ni  37,289-72,329 ppm. Kandungan ke lima logam tersebut masih lebih rendah dari nilai ambang batas yang ditetapkan oleh Kantor Menteri Negara Lingkungan Hidup 2010 dan baku mutu sedimen Ontario (Ontario Sediment Guideline) 2008. Kandungan logam berat dalam sedimen di Stasiun 4 lebih tinggi dibandingkan dengan Stasiun lainnya. Hal ini disebabkan oleh perbedaan tekstur sedimen di masing-masing stasiun. Stasiun 4 berada di muara sungai dan mempunyai sedimen dengan tekstur  berupa lumpur berwarna hitam.Kandungan logam Ni lebih tinggi dibandingkan dengan yang lain, hal ini menunjukkan adanya masukan sedimen dari Teluk Kendari dan Teluk Lasolo yang terbawa oleh arus, disamping yang berasal dari darat yang masuk melalui aliran sungai. Berdasarkan nilai indeks geoakumulasi (I-geo)sedimen di perairan ini termasuk kategori tidak tercemar oleh Pb, Cu, Zn, dan Ni (I_geo0), dan tercemar sedang oleh Cd (1I_geo2).Namun berdasarkan nilai indeks beban pencemaran (PLI), sedimen di perairan ini belum tercemar oleh logam berat Pb, Cd, Cu, Zn, dan Ni.
Perkembangan hasil tangkapan per upaya dan pola musim penangkapan ikan cakalang (Katsuwonus pelamis) di Perairan Prigi, Provinsi JawaTimur Agus Setiyawan; Setiya Tri Haryuni; Wijopriono .
Depik Vol 2, No 2 (2013): August 2013
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.2.2.726

Abstract

Abstract. Skipjack fishing activity in Prigi waters east java at fishing groud of WPP 573 mostly used purse seine and troll line.The aims of the study was to evaluate the fluctuation cacth per unit effort and catch sesaons of  skipjack in Prigi waters as  primary comodity big pelagic yield.. Catch per Unit Effort (CPUE) and IMP were calculated from primary data using vessel trips at port office and secondary data from statistic atPPN Prigi years 2000 – 2011to due analysis with using regretion and microsoft excel. Result showed  value of CPUE higher at 2002 year is 27,9 ton/year and lower at 2001 year is 0,5 ton/year with season pattern that occured higher catch that occured at Juni – Juli and September – Nopember, the peak season at September while famine season that occured at Januari – Mei, Agustus and December.Key words : Pattern Season; Effort; Cakalang; Prigi Waters Abstrak. Kegiatan penangkapan ikan Cakalang (Katsuwonus pelamis) di Perairan Prigi Jawa Timur, daerah penangkapan WPP 573,sebagian besar menggunakan alat tangkap pukat cincin dan pancing tonda.Tujuan penelitian ini adalah untuk mengetahui perkembangan hasil tangkapan per upaya penangkapan dan pola musim yang terjadi di Perairan Prigi khususnya pada perikanan cakalang yang menjadi komoditi utama hasil pelagis besar. Nilai Catch per Unit Effort (CPUE)dan Indeks Musim Penangkapan didapatkan dari data primer dari data trip kapal di syahbandar dan data sekunder berupa data statistik Pelabuhan Perikanan Nusantara (PPN) Prigi dari tahun 2000 – 2011 yang dilakukan analisis dengan menggunakan regresi sederhana dan menggunakan microsoft excel. Hasil penelitian menunjukkan bahwa nilai CPUE tertinggi terjadi pada tahun 2002 sebesar 27,9 ton/tahun serta terendah pada tahun 2001 sebesar 0,5 ton/tahun dengan pola musim yaitu hasil tangkapan tinggi/musim tangkapterjadi pada bulan Juni – Juli dan September – Nopember, musim puncak penangkapan terjadi pada bulan September sedangkan musim paceklik terjadi pada bulan  Januari – Mei , Agustus dan Desember.Kata kunci : Pola musim; Upaya; Cakalang; Perairan Prigi 
Aplikasi model hidrologi HBV di DAS Peusangan Aceh sebagai studi pengantar pengembangan konsep ekohidrologi berkelanjutan Yopi Ilhamsyah; Syahrizal Koem; Andi Syahid Muttaqin
Depik Vol 1, No 2 (2012): August 2012
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.1.2.31

Abstract

Abstract. A study of HBV hydrological model in Peusangan watershed Aceh as a preface study to the development of sustainable ecohydrological concept was done. The objective of the study was to apply and to test the HBV subtropical model into a tropical region Peusangan watershed. Peusangan watershed, situated in northern Aceh, covers an area of 2268.39 km2 and 128 km in length. The HBV model was manually calibrated by trial adjustment of each parameter to obtain the appropriate physical characteristics of Peusangan watershed. The result showed that the model was nearly consistent with the observation data. In fact, the correlation and error bias of the model were 0.623 and 0.11, respectively. However, the weakness of the model reported in the study is due to the coverage of the weather station data whi ch locate far in the downstream of Peusangan watershed. In the meantime, both of model result and observation showed a good agreement to catch the peakflow of Peusangan watershed. The two peakflow arise on May and October which were 212 m3dt-1 and 250 m3dt-1, respectively.Keywords. HBV Hydrological model, Peusangan watershed, peakflow
Dinamika batimetri alur pelayaran Pelabuhan Cirebon, Provinsi Jawa Barat Muhammad F. A. Ismail
Depik Vol 3, No 1 (2014): April 2014
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.3.1.1356

Abstract

Abstract. The Port of Cirebon is one of the largest port in West Java Province. The main problem in the Port of Cirebon is shallowing of the shipping channel due to sedimentation. The objective of this research was to assess the dynamics of the the bathymetry of shipping channel in Cirebon Port. The data used in this research are bathymetric survey data and ocean current data in the year 2006 and 2007 that was measured by PT. Pelabuhan Indonesia II. Bathymetric map was created using Surfer program version 8.0. Research results showed that the shipping channel depth of Cirebon Port varies in the range of 0.36 m to 6.97 m in 2006 and 0.79 m to 6.87 m in 2007. During the period of the year 2006 to the year 2007 sedimentation was occurred that marked by the increase of the volume of the sediment surface reached 6,818 m3. The ocean current around the Port of Cirebon is dominated by the tidal current with the direction to the northwest and to the southwest parallel to the shoreline which transported sediment into the shipping channel of Cirebon Port. Keywords: Port of Cirebon; Bathymetry; Sedimentation; Ocean current.   Abstrak. Pelabuhan Cirebon merupakan salah satu pelabuhan paling besar di Jawa Barat. Permasalahan utama dari Pelabuhan Cirebon yaitu terjadinya pendangkalan alur kapal sebagai akibat dari adanya sedimentasi. Penelitian ini bertujuan untuk mengkaji dinamika batimetri perairan Pelabuhan Cirebon. Data yang digunakan dalam penelitian ini berasal dari data pengukuran batimetri dan arus laut yang dilakukan oleh PT. Pelabuhan Indonesia II di daerah perairan Pelabuhan Cirebon pada tahun 2006 dan tahun 2007. Pembuatan peta batimetri menggunakan program Surfer versi 8. Hasil penelitian menunjukan bahwa kedalaman alur pelayaran Pelabuhan Cirebon sangat bervariasi dengan kisaran sebesar 0,36 m sampai 6,97 m pada tahun 2006 dan 0,79 m sampai 6,87 m tahun 2007. Selama periode tahun 2006 sampai tahun 2007 terjadi sedimentasi di alur pelayaran Pelabuhan Cirebon dengan penambahan volume sedimen permukaan sebesar 6.818 m3. Arus laut disekitar perairan Pelabuhan Cirebon didominasi oleh arus pasang surut dengan arah yang bergerak ke arah Barat Laut dan Tenggara yang membentuk arah yang sejajar dengan garis pantai yang dapat memuat sedimen masuk ke dalam alur pelayaran Pelabuhan Cirebon.Kata kunci: Pelabuhan Cirebon; Batimetri; Sedimentasi; Arus laut.
Pertumbuhan dan kelangsungan hidup benih ikan nila (Oreochromis niloticus) pada beberapa konsentrasi tepung daun jaloh (Salix tetrasperma) dalam pakan Zuraidha Yanti; Zainal A. Muchlisin; Sugito -
Depik Vol 2, No 1 (2013): April 2013
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.2.1.544

Abstract

Abstract. The objective of the present study was to evaluate the possibility of jaloh (Salix tetrasperma) leaf  powders as alternative raw material for tilapia fish feed. Four concentrations of jaloh leafe powders  (0%, 5%, 10% and 15%) were examined in this study. The experimental fish were fed three times a day on  08.00AM, 12.00AM and 17.00PM. with feeding ration of 5% of body weight for 42 days. The one-way Anova test showed that the different concentrations of jaloh leaf powders gave a significantly effect on growth performance of tilapia larvae (p 0.05), but did not give a significant effect on their survival rate (p0.05). The Duncans test showed that the higher growth performace and survival rate were found at 5-10% of jaloh leaf powders, it was indicated that diet with 5-10% jaloh leaf powders were better than control (without jaloh leaf powders). Therefore, it is concluded that the jaloh leaf powders is suitable as alternative raws material for tilapia formulated diet at concentration of 5-10%.  Key words: Protein, carbohydrate and alternative feed Abstrak. Penelitian ini bertujuan untuk mengevaluasi kemungkinan pemanfaatan  tepung daun jaloh (S. tetrasperma) sebagai bahan baku alternatif untuk pakan ikan nila (Oreochormis niloticus). Dalam penelitian ini telah diuji beberapa tingkat proporsi tepung daun jaloh yaitu (0%, 5%, 10%, dan 15%). Pemberian pakan dilakukan tiga kali sehari, yaitu pada pukul 08.00, 12.00 dan 17.00 WIB. Ikan diberikan pakan sebanyak 5% dari berat bobot tubuhnya selama 42 hari. Hasil uji Anova satu arah menunjukkan bahwa pemberian tepung daun jaloh memberikan pengaruh nyata  terhadap pertambahan bobot badan dan laju pertumbuhan harian benih ikan nila (p0,05), namun tidak berpengaruh nyata terhadap kelangsungan hidupnya (p0,05). Uji lanjut Duncan menunjukkan bahwa penambahan tepung daun jaloh 5-10% dalam pakan memberikan hasil terbaik dari segi pertumbuhan mutlak, pertumbuhan harian dan kelangsungan hidup, dan hasil ini lebih baik berbanding kontrol (tanpa daun jaloh). Dengan demikian dapat disimpulkan tepung daun jaloh dapat dijadikan sebagai bahan baku alternatif dalam pakan ikan dengan kadar 5-10%. Kata kunci: Protein, karbohidrat dan pakan alternatif
Pengaruh salinitas dan daya apung terhadap daya tetas telur ikan bandeng, Chanos-chanos Sofyatuddin Karina; Rizwan R; Khairunnisak K
Depik Vol 1, No 1 (2012): April 2012
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.1.1.22

Abstract

Abstract. The objective of this research was to study the influence of salinity and buoyancy on hatchability of milkfish eggs (Chanos-chanos). The completely random design was used this study. Two factors i.e. salinity and buoyancy were tested where the salinity with three levels oncentration; 16, 23 and 30 ppt, while the buoyancy with three egg buoyancy categories i.e. floating, drifting and sinking with three replicates respectively. The result showed that the hatchability of floating eggs in tested salinities were 76,7% ; 78,75% ; 91,7%, for 16, 23 and 30 ppt, respectively. Then drifting eggs were 65,3%; 67,0%; 77,0% and sinking eggs were 54,0% ; 55,3% ; 65,0% for 16, 23 and 30 ppt, respectively. In generally, the hatchability was increased with increasing of salinity. In addition, the hatchability of the floating eggs was higher than the sinking eggs. Keyword: Salinity, buoyancy, hatchability, milkfish.
Assessment of water quality based on biological indices of macrobenthos: a river under pressure from tourism activities Asep Sahidin; Zahidah Zahidah; Herman Hamdani; Heti Herawati; Mochamad Candra Wirawan Arief; M. Suhaemi Syawal; Aiman Ibrahim; Roni Sewiko; Chitra Octavina
Depik Vol 10, No 3 (2021): December 2021
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.10.3.22838

Abstract

Cijulang River is one of the leading ecotourism objects in Pangandaran, West Java Province, Indonesia. However, the river has a variety of activities that can increase the water pollution in the river such as Green Canyon cliffs tourism, ecotourism of mangrove conservation, housing, and industrial siting. Macrobenthos is one of the bio-indicators that can assess the rate of water pollution in rivers, especially their organic pollutants. Therefore, this research aims to determine water pollution status in Cijulang River Tourism by comparing various biotic indices. The study was conducted at four site sampling locations from upstream to downstream in the rainy season period and dry season period using different methods namely, line transect model, water quality assessment by biological indexing (diversity, species dominant, and family biotic), species deficit, and organic measurement. The research showed 5873 macrobenthos and divided into 27 species with an average abundance of 167 ind.m-2 and are mainly dominated by gastropod species Faunus ater (40%). They are extreme species that can live in high organic pollution and water salinity. This divided the research of quality water assessment of Cijulang River into three categories as follows: slightly polluted (score 36-46) at Green Canyon site, moderately polluted (score 50-60) at Boat Shelter and Muara Cijulang location, and highly polluted (score 66) at Nusawiru site.Keywords:RiverBio-indicatorOrganicAquatic pollution
Observation and numerical modeling of physical oceanography in the Balikpapan Bay, East Kalimantan: Preliminary results Mutiara Rachmat Putri; Iwan P Anwar; Zetsaona Sihotang; Lamona I. Bernawis; Agus Setiawan; Muhammad Riza; Idris Mandang; Willem M. Tatipatta
Depik Vol 10, No 2 (2021): August 2021
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.10.2.19259

Abstract

The Indonesian government plans to move the capital city from Jakarta to Penajam Paser Utara (PPU) which is the upstream area of Balikpapan Bay, East Kalimantan. There are several activities in the planned new capital city that potentially affect the condition of land and marine ecosystems, including clearing new land for housing and agriculture as well as expanding mining and petroleum areas. Directly or indirectly, these activities could affect the oceanographic conditions of Balikpapan Bay. For this reason, in order to obtain an up-to-date picture of Balikpapan Bay, an oceanographic survey was conducted in early March 2020. In addition, to support the analysis of marine dynamics in these waters and their predictions in the future, numerical simulations of hydrodynamic modeling were also carried out. Oceanographic observations indicate significant water stratification in the area about 20 km from the mouth of the bay. This result is also well illustrated in the hydrodynamic model numerical simulation, where there is a water loop at the confluence between salt and fresh water masses from two rivers 18-20 km from the mouth of Balikpapan Bay. Keywords:The national capital city of IndonesiaBalikpapan BayPhysical oceanography ObservationCoastal and marine Ecosystem

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