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DINAMIKA ARUS DALAM MENDUKUNG PERIKANAN BUDIDAYA LAUT DI TELUK BONE S. Pranowo, Widodo; D. Puspita, Candra; Bramawanto, Rikha; A. Adi, Rizky; Kusumawardani, Anastasia R. T. D.
Jurnal Harpodon Borneo Vol 7, No 2 (2014): Volume 7 No 2 Oktober 2014
Publisher : Jurnal Harpodon Borneo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (982.508 KB) | DOI: 10.35334/harpodon.v7i2.119

Abstract

Ocean current condition which is hypothized support potential fisheries in Teluk Bone is interesting to be studied. This article presents the result of a simulation of the three-dimensional hydrodynamics modeling, in order to understand the current circulation in Teluk Bone. Snapshots of the modeling produce the phenomena that occur in Southeast Monsun period (August 1-10, 2004) in order to match with data verification available. Sea surface elevation at spring tide is  0.0492 – 2.4140 meters. The speed velocity of surface current at same condition in range of 0.5x10-3 – 12.25x10-3 m/sec, with dominant direction alongshore of the east coast and then headed North and West. Downwelling occurs somewhere in west coast and upwelling occurs somewher in east coast. The vertical upwelling velocity is in range of 0,5x10-3 - 3,5x10-3 m/sec, while vertical downwelling velocity is in range of 0,5x10-3 - 4,6x10-3 m/sec. In this monsoon period, the velocity of surface current support of the marine aquaculture activities, since the range is still follow to UNDP/FAO standard values of  <100 cm/sec. The low vertical velocity of upwelling and downwelling keeps nutrients in a low mixing condition, then those can be stable utilized by phytoplankton. Palopo, Suli and Muranti are the coastal city location nearby  that upwelling and downwelling occurs and sea surface current velocity in good suitability for seaweed cultivation, fish farming on “keramba” floating cages/nets and some oyster pearl cultivation. Keywords : current pattern, hydrodynamics modeling, Teluk Bone, marine aquaculture
DISTRIBUTION OF HEAVY METALS IN NATUNA COASTAL WATERS Sophia L Sagala; Rikha Bramawanto; Anastasia R.T.D Kuswardani; Widodo S Pranowo
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 6 No. 2 (2014): Electronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (848.025 KB) | DOI: 10.29244/jitkt.v6i2.9008

Abstract

ABSTRACTThe study of Pb, Cd, Cu, Hg, and As and Fe in Natuna coastal waters, Riau Islands was conducted in November 2012. Water and sediment samples were collected from 35 stations by purposive sampling method and those heavy metals were analysed using Atomic Absorption Spectrophotometer, flame type (FAAS). The results showed that concentrations of total Pb, Cd, Cu, Hg, and As in surface water were below instrument detection limit (2 µg/L for Pb, Cd, and Cu; 0.02 µg/L for Hg and As). Moreover, the concentration of metal Fe in surface water was 0.021-0.054 mg/L. Concentrations of Pb and Cu in sediment were 0.05-22.67 mg/kg and 3.77-11.00 mg/kg, respectively, at which the highest concentrations were found near Binjai Estuary. Those concentrations were significantly below the standard levels set by CCME (2002) and ANZECC/ARMCANZ (2000). Concentration of Fe in sediment varied from 751.13-2309.12 mg/kg and showed similar spatial distribution to Cu-in-sediment. No standard level for Fe in waters was available. Generally, it can be concluded that Natuna coastal water was still uncontaminated.  Keywords: heavy metals, iron metal, Natuna coastal waters.
Kualitas perairan Natuna pada musim transisi Mariska Astrid Kusumaningtyas; Rikha Bramawanto; August Daulat; Widodo S. Pranowo
Depik Vol 3, No 1 (2014): April 2014
Publisher : Faculty of Marine and Fisheries, Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1156.73 KB) | DOI: 10.13170/depik.3.1.1277

Abstract

Abstrak. Perairan Natuna, khususnya pada Kawasan Konservasi Laut Daerah (KKLD) I diprioritaskan untuk mendukung kegiatan perikanan berkelanjutan, sehingga penting diketahui kualitasperairannya. Penelitian ini bertujuan untuk mengetahui karakteristik kualitas air berdasarkan parameter fisika maupun kimia sebagai basis data terkini mengenai kualitas perairan Natuna pada musim transisi. Penelitian dilakukan di 31 stasiun pada bulan November 2012. Parameter kualitas air yang diukur antara lain kecerahan, derajat keasaman (pH), oksigen terlarut, suhu, salinitas, padatan tersuspensi total atau Total Suspended Solids (TSS) dan nutrien (nitrat, fosfat, silikat). Parameter pH, oksigen terlarut, suhu, dan salinitas diukur secara in-situ menggunaan alat water quality meter (TOA-DKK), kecerahan diukur menggunakan secchi disk, sedangkan sampel air di bawa ke laboratorium untuk dianalisis konsentrasi nutrien dan TSS. Hasil penelitian menunjukkan nilai kisaran kecerahan yaitu 2-20,9 (m), pH 8,09-8,27, oksigen terlarut 6,34-7,96 (mg/l), suhu 29,2-30,6 (°C), salinitas 27,9-30,4 (PSU), TSS 3-26 (mg/l), nitrat 0,005-0,078 (mg/l), fosfat 0,005-0,015 (mg/l) dan silikat 0,045-0,704 (mg/l). Hasil penelitian dibandingkan dengan baku mutu air laut untuk biota laut berdasarkan Keputusan Menteri Lingkungan Hidup Nomor 51 Tahun 2004. Berdasarkan hasil penelitian, kondisi perairan Natuna masih tergolong baik untuk menunjang kehidupan biota laut.Kata kunci: Parameter kimia; Parameter fisika; Natuna; musim transisi