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All Journal Jurnal Ilmu dan Teknologi Kelautan Tropis POSITRON Maspari Journal Marine Research in Indonesia
Mulia Purba
Departemen Ilmu dan Teknologi Kelautan, FPIK-IPB, Bogor
Biochemistry, Genetics & Molecular Biology Decision Sciences, Operations Research & Management Earth & Planetary Sciences Energy Library & Information Science Physics

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TIDAL PATTERNS AND RESOURCE USE IN THE MUSI-BANYUASIN COASTAL ZONE OF SUMATRA Hadi, Safwan; Hanson, Arthur J.; Koesoebiono, -; Mahlan, Musrefinah; Purba, Mulia; Rahardjo, Santoso
Marine Research in Indonesia Vol 19 (1977)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2348.152 KB) | DOI: 10.14203/mri.v19i0.376

Abstract

Tidal influence extends 100 km upriver in the coastal swamplands of Sumatra and Kalimantan. In planning development or resource use, description of local tidal variation is important since tides interact with river flow to zone the land and waters into a series of distinctive environments. The coastal swamps are being opened for rice cultivation with tidally-influenced irrigation and drainage canals. There are also forestry and fishery activities plus major shipping activities in these delta areas. The tidal patterns arc studied in the South Sumatra coastal portion of the Musi and Banyuasin River basins. The tides are mixed, predominantly diurnal with a maximum range of 3.5 m near the coast. Significant differences in tidal amplitude and phase exist between rivers separated by deltas often less than 10 km in width. Differences in river water flow atributed to season or basin characteristics influence tidal patterns. On the Musi river the relationship between tidally-influenced resource uses and distance from the sea suggests the greatest variety of activities occurs within the zone of maximum tidal range 0 to 30 km from the delta fronts. This zone should therefore be considered a region of special ecological concern. A mechanism is needed for coordinated planning of infrastructure changes likely to influence hydrology or resource uses. Predictive models should be developed for measuring the likely impact of such development on coastal hydrology.
TIDAL PATTERNS AND RESOURCE USE IN THE MUSI-BANYUASIN COASTAL ZONE OF SUMATRA Hadi, Safwan; Hanson, Arthur J.; Koesoebiono, -; Mahlan, Musrefinah; Purba, Mulia; Rahardjo, Santoso
Marine Research in Indonesia Vol 19 (1977)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2348.152 KB) | DOI: 10.14203/mri.v19i0.376

Abstract

Tidal influence extends 100 km upriver in the coastal swamplands of Sumatra and Kalimantan. In planning development or resource use, description of local tidal variation is important since tides interact with river flow to zone the land and waters into a series of distinctive environments. The coastal swamps are being opened for rice cultivation with tidally-influenced irrigation and drainage canals. There are also forestry and fishery activities plus major shipping activities in these delta areas. The tidal patterns arc studied in the South Sumatra coastal portion of the Musi and Banyuasin River basins. The tides are mixed, predominantly diurnal with a maximum range of 3.5 m near the coast. Significant differences in tidal amplitude and phase exist between rivers separated by deltas often less than 10 km in width. Differences in river water flow atributed to season or basin characteristics influence tidal patterns. On the Musi river the relationship between tidally-influenced resource uses and distance from the sea suggests the greatest variety of activities occurs within the zone of maximum tidal range 0 to 30 km from the delta fronts. This zone should therefore be considered a region of special ecological concern. A mechanism is needed for coordinated planning of infrastructure changes likely to influence hydrology or resource uses. Predictive models should be developed for measuring the likely impact of such development on coastal hydrology.
Pemodelan Pola Arus di Perairan Pesisir Banyuasin, Sumatera Selatan Surbakti, Heron; Purba, Mulia; Nurjaya, I Wayan
Maspari Journal : Marine Science Research Vol 3, No 2 (2011): Edisi Juli
Publisher : UNIVERSITAS SRIWIJAYA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (473.838 KB) | DOI: 10.36706/maspari.v3i2.1309

Abstract

A two-dimensional model to investigate the pattern of current in estuary of Banyuasin has been developed. The properties of tide, wind, and current were measured to understand the dynamics of estuarine environment.  Based on the information, the model of current simulation were performed.  The simulation of model shows that offshore flow during flood tide and inland flow during ebb tide.  Maximum current speed was recorded during mean-sea-level towards high tide of 0.8716 m s-1, while the minimum was 0.0661 m s-1 observed during ebb tide. The difference current speed between model and recorded is 0.04 m s-1.   Keywords  : Modeling, Current, Tidal, Banyuasin.   ABSTRAK Model dua dimensi dibangun untuk melihat pola arus di perairan pesisir Banyuasin.  Karakteristik pasang surut, angin dan arus diukur untuk memahami dinamika lingkungan estuari.  Berdasarkan karakteristik parameter tersebut, model dan simulasi pola arus dibangun.  Berdasarkan hasil simulasi diperoleh gambaran bahwa pola arus menuju laut saat periode pasang dan menuju daratan saat periode surut.  Kecepatan arus maksimum diperoleh saat mean sea level menuju pasang tertinggi dengan kecepatan 0.8716  m s-1, dan kecepatan arus minimum diperoleh saat kondisi surut terendah sebesar 0.0661 m s-1.  Perbedaan kecepatan arus hasil model dengan hasil pengukuran adalah sebesar 0.04 m s-1.   Kata Kunci  : Pemodelan, Arus, Pasang Surut, Banyuasin
Model Pembentukan Eddy Akibat Interaksi Arus dan Topografi di Teluk Palu, Sulawesi Tengah Sabhan, Sabhan; Pranowo, Widodo Setiyo; Purba, Mulia; Koropitan, Alan Frendy
POSITRON Vol 10, No 1 (2020): Vol. 10 No. 1 Edition
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam, Univetsitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1027.043 KB) | DOI: 10.26418/positron.v10i1.37263

Abstract

Tofografi Teluk Palu unik dengan degradasi kedalaman yang tinggi sehingga membentuk kemiringan lereng yang curam. Tofografi teluk menyebabkan arus pusaran (eddy) membentuk siklonik dan antisiklonik sebagai salah satu penggerak upwelling. Penelitian ini menggunakan model hidrodinamika dengan pendekatan volume hingga dengan koordinat vertikal sigma. Model dibangkitkan oleh pasang surut dan angin. Hasil model menunjukkan korelasi pasang surut (r = 0,9937) yang baik dengan kondisi di Teluk Palu. Eddy Siklonik yang terbentuk mempunyai diameter yang berbeda untuk setiap kedalaman oleh efek dari tofografi aliran di Teluk Palu. Lokasi perpindahan vertikal massa air ke atas yang dikenal sebagai upwelling bersesuaian dengan eddy siklonik yang terbentuk.
KARAKTERISTIK UPWELLING DI PERAIRAN SELATAN JAWA PADA TAHUN STRONG LA NINA 2010 DAN SUPER EL NINO 2015 Atmadipoera, Agus S.; Jasmine, Agitha S.; Purba, Mulia; Kuswardani, Anastasia R.T.D.
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 12 No. 1 (2020): 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 (1154.577 KB) | DOI: 10.29244/jitkt.v12i1.28977

Abstract

Upwelling pantai musiman di perairan Selatan Jawa diduga dapat dimodulasi oleh variabilitas antar-tahunan laut-atmosfer El Nino Southern Oscillation (ENSO). Penelitian ini bertujuan untuk menganalisis perbedaan karakteristik upwelling musiman selama kejadian La Nina 2010 dan El Nino 2015, berdasarkan multi-dataset dari keluaran model INDESO dan dari data satelit. Karakteristik yang berbeda dari upwelling musiman terlihat jelas. Di La Nina, variabel laut-atmosfer permukaan jauh lebih rendah daripada yang diamati di El Nino, kecuali untuk tingkat curah hujan, suhu permukaan laut, dan tinggi permukaan laut. Di La Nina, air laut yang lebih hangat (27-28°C) dan lebih tawar (<33,80psu) mendominasi di atas lapisan kedalaman 45m, yang menahan air dingin upwelling tetap di bawah permukaan. Sebaliknya, di El Nino, air bawah permukaan naik secara drastis dari isoterm 25-26°C dan isohalin dari 34,24-34,44psu tersingkapkan di permukaan laut. Indeks upwelling berbasis suhu adalah -2°C dan +4°C, menunjukkan ENSO telah sangat memodulasi intensitas upwelling. Arus Pantai Selatan Jawa (SJCC) yang kuat mengalir kearah timur hanya ditemukan pada kejadian La Nina. Aliran Arlindo yang persisten di selatan 9,5°S terlihat pada ENSO berbeda. Perkiraan angkutan Ekman yang diturunkan dari model arus meridional telah diintervensi secara kuat oleh kehadiran SJCC dan Arlindo.
Co-Authors Agus Atmadipoera Alan Frendy Koropitan Hanson, Arthur J. Hanson, Arthur J. Heron Surbakti I Wayan Nurjaya Jasmine, Agitha S. Koesoebiono, - Koesoebiono, - Kuswardani, Anastasia R.T.D. Mahlan, Musrefinah Mahlan, Musrefinah Sabhan Sabhan Safwan Hadi Santoso Rahardjo, Santoso Widodo S Pranowo