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Variabilitas ENSO terhadap Arus Pusaran dan Sebaran Ikan Cakalang di Wilayah Pengelolaan Perikanan 713 Ratnasari, Syarifah Leila; Harahap, Syawaluddin; sunarto, sunarto; Purba, Noir; Pranowo, Widodo
Jurnal Harpodon Borneo Vol 10, No 2 (2017): Volume 10 No.2 Oktober 2017
Publisher : Jurnal Harpodon Borneo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1214.252 KB) | DOI: 10.35334/harpodon.v10i2.215

Abstract

The Fisheries Management Area (WPP) RI KP 713 under Decree No. 1 year 2009 includes Makassar Strait, Bone Bay, Flores Sea and the Sea of Bali. WPP-RI 713 is an area traversed by Arlindo. Arlindo occurs due to differences in surface pressure between the Pacific and Indian Oceans that value varies and it is influenced by the ENSO (Gordon et al, 2008). ENSO criteria can affect eddies variations. Eddies can affect the value SPL and salinity will affect the distribution of skipjack fish. This study aimed to analyze the relationship of ENSO variability with eddy patterns and biomass skipjack in 2014 - 2016. The research method was conducted descriptively by visualizing the variability of ENSO and skipjack biomass in the graph. Meanwhile, visualization current distribution patterns, SPL, and salinity using the ODV software. The relationship between all the variables are calculated by linear regression quantitatively. The visualization results indicate ENSO criteria affects eddy patterns, temperature, and salinity. By the time El Nino years of 2014 - 2015 occured 10-12 eddies, SPL average colder 290C, and higher salinity 33.3 psu. In 2016 a normal year with decreased eddies 9 incident, SST average 30.2oC, and salinity 33.3 psu. Distribution of Skipjack showed significant patterns between phases Nino years of 2014 - 2015 with the average 2.75 – 3.25 g/m2 and a normal year with the average 9:15 g / m2. Linear correlation between ENSO and the current showed positive results in 2014 and 2016, whereas in 2015 was negative. The correlation between ENSO and skipjack biomass showed positive results in 2015 and 2016, whereas in 2014 was negative.Keywords : ENSO, Eddy, Skipjack Biomass, Temperature, Salinity
KARAKTERISTIK GELOMBANG SIGNIFIKAN DI SELAT KARIMATA DAN LAUT JAWA BERDASARKAN RERATA ANGIN 9 TAHUNAN (2005-2013) Wicaksana, Sigit; Sofian, Ibnu; Pranowo, Widodo
Journal Omni-Akuatika Vol 11, No 2 (2015): Omni-Akuatika November
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2650.739 KB) | DOI: 10.20884/1.oa.2015.11.2.37

Abstract

Karimata strait and the java sea is one of the most densely shipping lanes in the maritime country of Indonesia. Information of a significant wave is needed to safety navigation. The prediction of a significant wave mostly employs the modeling using wind as input data to produce an early warning warning prediction. Characteristic of a significant wave shows the maximum wave height in the strait and the java sea karimata occurs in west monsoon (January) and east season (August) every year. Especially at the peak of west monsoon (January) maximum wave height reach 1.5-3 meters in Karimata Strait, and reach 0.5-2.5 meters in Java Sea. The frequency of significant wave occurences mostly extend until February, where wave height in Java Sea will stay the same (0.5-2.5 meters), while in Karimata Strait is little bit decrease (1-2.5 meters). Recommended to all sea transportation users, in those regions during January and February, to avoid using ship with the hull is less than 3 meters height.Keywords: significant wave characteristic, Karimata Strait, Jawa Sea, Wind, Modeling
VARIABILITAS ENSO TERHADAP ARUS PUSARAN DAN SEBARAN IKAN CAKALANG DI WILAYAH PENGELOLAAN PERIKANAN 713 Ratnasari, Syarifah Leila; Harahap, Syawaluddin; sunarto, sunarto; Purba, Noir; Pranowo, Widodo
Jurnal Harpodon Borneo Vol 10, No 2 (2017): Volume 10 No.2 Oktober 2017
Publisher : Jurnal Harpodon Borneo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35334/harpodon.v10i2.215

Abstract

The Fisheries Management Area (WPP) RI KP 713 under Decree No. 1 year 2009 includes Makassar Strait, Bone Bay, Flores Sea and the Sea of Bali. WPP-RI 713 is an area traversed by Arlindo. Arlindo occurs due to differences in surface pressure between the Pacific and Indian Oceans that value varies and it is influenced by the ENSO (Gordon et al, 2008). ENSO criteria can affect eddies variations. Eddies can affect the value SPL and salinity will affect the distribution of skipjack fish. This study aimed to analyze the relationship of ENSO variability with eddy patterns and biomass skipjack in 2014 - 2016. The research method was conducted descriptively by visualizing the variability of ENSO and skipjack biomass in the graph. Meanwhile, visualization current distribution patterns, SPL, and salinity using the ODV software. The relationship between all the variables are calculated by linear regression quantitatively. The visualization results indicate ENSO criteria affects eddy patterns, temperature, and salinity. By the time El Nino years of 2014 - 2015 occured 10-12 eddies, SPL average colder 290C, and higher salinity 33.3 psu. In 2016 a normal year with decreased eddies 9 incident, SST average 30.2oC, and salinity 33.3 psu. Distribution of Skipjack showed significant patterns between phases Nino years of 2014 - 2015 with the average 2.75 ? 3.25 g/m2 and a normal year with the average 9:15 g / m2. Linear correlation between ENSO and the current showed positive results in 2014 and 2016, whereas in 2015 was negative. The correlation between ENSO and skipjack biomass showed positive results in 2015 and 2016, whereas in 2014 was negative.Keywords : ENSO, Eddy, Skipjack Biomass, Temperature, Salinity
NUMERICAL SIMULATION OF OCEAN WAVE USING HIGH-ORDER SPECTRAL MODELING TECHNIQUES: ITS INFLUENCE ON TRANSPORT SEDIMENT IN BENOA BAY, BALI, INDONESIA Wisha, Ulung Jantama; Al Tanto, Try; Pranowo, Widodo; Husrin, Semeidi; Kusumah, Gunardi; Maryono, agus
Journal Omni-Akuatika Vol 15, No 2 (2019): Omni-Akuatika November
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.oa.2019.15.2.554

Abstract

Benoa Bay is threatened by sedimentation issue within the bay. It impairs the water mass circulation, influencing scour, mixing, and turbulence as well as sediment transport processes. This study focuses on the wave characteristic and its relation to sediment transport within Benoa Bay. Spectral wave modeling techniques were employed. The equation was discretized based on the condition of winds, tidal, and currents. Total sediment transported was calculated according to the wave model result. Total suspended sediment (TSS) model was simulated which the simulation considers bed load and suspended load transport. Significant wave height (Hs) ranged 0-0.48 m and 0-0.44 m during high tidal condition and low tidal condition respectively. Wave undulation propagates toward the West and Northwest within Bay. The wave period (Ts) ranged 2-6.5 second. Total sediment transport ranged 2828.16 - 86235.66 m3/year. TSS concentration ranged 1-100 mg/L and 1-155 mg/L during high tidal condition and low tidal condition respectively. Those conditions indicate that the sedimentation has been extremely occurred within the bay. The areas around Benoa peninsula, Benoa harbor, and Serangan Island are heavily polluted by suspended sediment. Bottom sediment is stirred by hydraulic jump off wave propagation. The first wave crest induces scour, which its train carries the stirred sediment entering the bay. If ongoing, this condition will exacerbate the existing ecosystem. Benoa Bay development has a big role evoking the level of TSS and turbidity. The more the sedimentation occurs, the more the ecological problem takes place.