scholarly journals KARAKTERISTIK GELOMBANG SIGNIFIKAN DI SELAT KARIMATA DAN LAUT JAWA BERDASARKAN RERATA ANGIN 9 TAHUNAN (2005-2013)

Omni-Akuatika ◽  
2015 ◽  
Vol 11 (2) ◽  
Author(s):  
Sigit Wicaksana ◽  
Ibnu Sofian ◽  
Widodo Pranowo
Keyword(s):  
Wave Height ◽  
Input Data ◽  
Wave Characteristic ◽  
Maximum Wave Height ◽  
Significant Wave ◽  
Sea Transportation ◽  
Java Sea ◽  
Karimata Strait ◽  
Sea Wind ◽  
West Monsoon

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

scholarly journals Kajian Energi Gelombang Laut Di Daerah Abrasi Serangai, Bengkulu Utara Melalui Pengamatan Tinggi Gelombang Laut

2021 ◽  
Vol 11 (2) ◽  
pp. 143
Author(s):  
Ashar Muda Lubis ◽  
Yosi Apriani Putri ◽  
Rio Saputra ◽  
Juhendi Sinaga ◽  
M Hasanudin ◽  
...  
Keyword(s):  
Wave Height ◽  
Wave Energy ◽  
Seasonal Variations ◽  
Coastal Area ◽  
Significant Wave Height ◽  
Ocean Waves ◽  
Wave Period ◽  
Maximum Wave Height ◽  
Significant Wave ◽  
Sea Wave

<p class="AbstractText"><span lang="EN-AU">The Serangai area, Batik Nau District, North Bengkulu has the highest average abrasion speed of 20 m/year. The abrasion could cause the coastal area to erode the coastline till several tens of meters. The purpose of this study was to determine the height of the ocean waves and to determine the energy of the ocean waves that has the potential to accelerate the abrasion process in the Serangai area. The research was carried out on November 5-7, 2018 in the Serangai beach area at a depth of 5 m using SBE 26 Plus Seagauge Wave equipment. The results showed that the observed wave height was between 0.8-1.6 m with a significant wave height (Hs) of 1.38 m. In addition, the wave period ranges from 5-11 s with a significant wave period (Ts) of 8.2 s. The result also shows that the maximum wave height of 1.6 m occurred on November 7, 2018 with maximum wave energy of 1800 J/m<sup>2</sup>. This result can perhaps accelerate the abrasion process in the Serangai area. It can also be seen that the wave height in the Serangai region is higher than in several other areas in Indonesia. However, it is necessary to continue observing the wave height to see the seasonal variations in sea wave height in Serangai area.</span></p>

scholarly journals Waves off Gopalpur, northern Bay of Bengal during Cyclone Phailin

2014 ◽  
Vol 32 (9) ◽  
pp. 1073-1083 ◽  
Author(s):  
M. M. Amrutha ◽  
V. Sanil Kumar ◽  
T. R. Anoop ◽  
T. M. Balakrishnan Nair ◽  
A. Nherakkol ◽  
...  
Keyword(s):  
Wave Height ◽  
Bay Of Bengal ◽  
Significant Wave Height ◽  
Wave Spectrum ◽  
Statistical Parameters ◽  
Freak Wave ◽  
Maximum Wave Height ◽  
Significant Wave ◽  
Before And After ◽  
Northern Bay Of Bengal

Abstract. The wave statistical parameters during Cyclone Phailin which crossed the northern Bay of Bengal are described based on the Directional Waverider buoy-measured wave data from 8 to 13 October 2013. On 12 October 2013, the cyclone passed within 70 km of the Waverider buoy location with a wind speed of 59.2 m s−1 (115 knots), and during this period, a maximum significant wave height of 7.3 m and a maximum wave height of 13.5 m were measured at 50 m water depth. Eight freak wave events are observed during the study period. The ratio of the maximum wave height to significant wave height recorded is found to be higher than the theoretical value and the ratio of the crest height to wave height during the cyclone was 0.6 to 0.7. The characteristics of the wave spectra before and after the cyclone is studied and found that the high-frequency face of the wave spectrum is proportional to f−3 before the cyclone and is between f−4 and f−5 during the cyclone period.

scholarly journals Analysis of ocean wave characteristic in Western Indonesian Seas using wave spectrum model

2018 ◽  
Vol 147 ◽  
pp. 05001
Author(s):  
Rima Rachmayani ◽  
Nining Sari Ningsih ◽  
Hani Ramadhan ◽  
Suliskania Nurfitri
Keyword(s):  
Indian Ocean ◽  
South China Sea ◽  
Wave Height ◽  
South China ◽  
Ocean Wave ◽  
Indonesian Seas ◽  
Significant Wave ◽  
China Sea ◽  
Mode 2 ◽  
Java Sea

Understanding the characteristics of the ocean wave in Indonesian Seas particularly in western Indonesian Seas is crucial to establish secured marine activities in addition to construct well-built marine infrastructures. Three-years-data (July 1996 - 1999) simulated from Simulating Waves Nearshore (SWAN) model were used to analyze the ocean wave characteristics and variabilities in eastern Indian Ocean, Java Sea, and South China Sea. The interannual or seasonal variability of the significant wave height is affected by the alteration of wind speed and direction. Interactions between Indian Ocean Dipole Mode (IODM), El Niño Southern Oscillation (ENSO) and monsoon result in interannual ocean wave variability in the study areas. Empirical Orthogonal Functions (EOF) analysis produces 6 modes represents 95% of total variance that influence the wave height variability in the entire model domain. Mode 1 was dominated by annual monsoon and has spatial dominant contribution in South China Sea effected by ENSO and Indian Ocean influenced by IODM. Java Sea was influenced by Mode 2 which is controlled by semi-annual monsoon and IODM. A positive (negative) IODM strengthens (weakens) the winds speed in Java Sea during the East (West) season and hence contributes to Mode 2 in increasing (decreasing) the significant wave in Java Sea.

scholarly journals Karakteristik Parameter Oseanografi (Pasang-Surut, Arus, dan Gelombang) di Perairan Utara dan Selatan Pulau Bangka

2018 ◽  
Vol 7 (1) ◽  
pp. 51 ◽  
Author(s):  
Aditya Pamungkas
Keyword(s):  
Wind Direction ◽  
Significant Wave Height ◽  
Tidal Range ◽  
The Third ◽  
Wave Characteristics ◽  
The North ◽  
Java Sea ◽  
Karimata Strait ◽  
West Monsoon ◽  
Oceanographic Conditions

Perairan di Provinsi Kepulauan Bangka Belitung merupakan perairan yang terletak di Selat Karimata. Di sebelah utara Pulau Bangka, terdapat perairan Teluk Kelabat yang berhadapan dengan Laut Natuna. Sebaliknya, Selat Sadai terletak di sebelah selatan Pulau Bangka dan berhadapan langsung dengan Laut Jawa. Penelitian ini bertujuan untuk mengetaui karakteristik parameter oseanografi di perairan tersebut yang meliputi kondisi pasang-surut, arus, dan gelombang. Data yang dipergunakan untuk menganalisis ketiga parameter oseanografi tersebut diperoleh dari Badan Informasi Geospasial (BIG). Penelitian ini akan menfokuskan pada kondisi oseanografi pada musim timur (Juli 2017) dan musim barat (Januari 2018).  Hasil analisis menunjukan pasang-surut di kedua perairan tersebut bertipe diurnal dengan kategori makro-tidal di Teluk Kelabat dan meso-tidal di Selat Sadai dengan tunggang pasang surut masing-masing 3m dan 2,5m. Selanjutnya, arah arus di perairan Teluk Kelabat dan Selat Sadai mempunyai pola yang mengikuti arah angin di tiap musimnya dan kecepatannya cenderung lebih tinggi di musim barat. Kecepatan arus berkisar antara 0.2–0.3 m/det. Untuk karakteristik gelombang, tinggi gelombang signifikan di perairan utara Pulau Bangka (Teluk Kelabat) cenderung lebih besar yaitu berkisar antara 0.1-0.5 m. Sedangkan perairan selatan Pulau Bangka (Selat Sadai) tinggi gelombang berkisar antara 0.1-0.3 m. Tinggi gelombang cenderung lebih besar ketika musim barat dibandingkan ketika musim timur.  Bangka Belitung seas is located in the Karimata Strait. In the North of Bangka Island, there are Kelabat Bay that the Natuna Sea was confronted with. Instead, Sadai Strait is located at  south Bangka Island and dealing directly with the Java Sea. This study will compare the oceanographic characteristics in both region which include tidal conditions, currents, and waves. The data are used to analyze the third oceanographic parameters obtained from the Badan Informasi Geospasial  (BIG). In this research will be focusing on the oceanographic conditions in the east monsoon (July 2017) and west monsoon (January 2018). The results of this research shows the tides in both the waters of diurnal with the category macro-tidal at the Kelabat Bay and meso-tidal at Strait Sadai with the tidal range are 3m and 2,5m . Furthermore, the direction of the currents in the waters of Kelabat Bay and Strait Sadai will follow the wind direction in every season and tends to be higher at west monsoon with the current veolcity around 0.2-0.3 m/s. For the wave characteristics, significant wave height in north seas of the Bangka Island (Kelabat Bay) tend to be larger, around 0.1-0.5m when compared with south seas of Bangka Island (Sadai Strait) around 0.1-0.3m and tend to be higher when west monsoon than east monsoon.

scholarly journals A DISCUSSION OF SOME MEASURED WAVE DATA

1972 ◽  
Vol 1 (13) ◽  
pp. 3 ◽  
Author(s):  
J.R. Wilson ◽  
W.F. Baird
Keyword(s):  
Spectral Analysis ◽  
Nova Scotia ◽  
Wave Height ◽  
Significant Wave Height ◽  
Peak Period ◽  
Maximum Wave Height ◽  
Significant Wave ◽  
Individual Wave ◽  
Wave Heights ◽  
Classical Parameters

The significant wave height and peak period as derived from the spectral analysis of 171 measured wave records taken in the ocean off Western Head, Nova Scotia are compared to the more classical parameters derived from individual wave heights and by the Tucker method. The highest surface elevation and the maximum wave height occurring in the records are compared to values predicted by Cartwright and Longuet-Higgins (1956), Goda (1970), and Longuet-Higgins (1952).

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