Analisis Karakteristik Gelombang Laut Menggunakan  Software Windwave-12 (Studi Kasus : Kepulauan Mentawai)

Marelsa, Nadia Friska; Oktaviandra, Yosyea

doi:10.14203/oseana.2019.vol.44no.2.23

Cited by 7 publications

(3 citation statements)

References 2 publications

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“…Pada riset ini, telah dilakukan klasifikasi data berdasarkan periode monsun, yaitu monsun barat pada bulan Desember, Januari, dan Februari (DJF); masa peralihan I pada bulan Maret, April, dan Mei (MAM); monsun timur pada bulan Juni, Juli, dan Agustus (JJA); dan masa peralihan II pada bulan September, Oktober, dan November (SON). Angin regional di suatu wilayah mengikuti pola angin musim yang terjadi, ditandai adanya pembalikan musiman sistem angin utama yaitu perubahan arah gaya gradien tekanan permukaan dan cuaca utama ketika musim panas dan ketika musim dingin (Marelsa & Oktaviandra, 2019;Wardhani et al, 2021). Pulau Jawa sepenuhnya berada di bawah garis katulistiwa, sehingga arah angin dominan dipengaruhi posisi matahari saat di belahan bumi utara angin dari Australia menuju ke Asia, sedangkan saat posisi matahari di belahan bumi selatan maka angin dari Asia menuju Australia (Koagouw et al, 2013).…”

Section: Perbandingan Karakteristik Angin Berdasarkan Periode Monsununclassified

Karakteristik Angin Wilayah Pesisir Utara Pulau Jawa Berdasarkan Variabilitas Monsun

Ma’rufatin,

Yananto,

Pandoe

2024

Jurtekling

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The characteristics of near-surface winds correlated with global phenomena such as monsoons have previously been extensively investigated. However, limited wind data investigations have been conducted in the northern coastal region of Java Island. This research aims to analyze the wind characteristics in this region, focusing on monsoon variability. Statistical analysis and wind rose diagrams analysis were conducted using wind direction and speed data spanning from 2013 to 2022 at three Meteorological Station by the Meteorology, Climatology, and Geophysics Agency (BMKG): Tanjung Priok-North Jakarta, Tanjung Mas-Semarang, and Perak II-Surabaya. The analysis results indicate that North Jakarta has experienced an increasing trend in annual average wind speed over a decade, whereas Semarang and Surabaya have seen a decrease. When influenced by the east and west monsoons, wind speeds in North Jakarta and Semarang are higher than during transition periods I and II. Conversely, in Surabaya, the average value was highest during transition period II compared to the west monsoon, east monsoon, and transition period I. Surabaya's average daily wind speed surpassed that of North Jakarta and Semarang. However, Semarang exhibited the highest maximum wind speed among the three regions. The dominant wind direction aligns with the monsoon wind pattern, whether the west or the east. During the transition season, wind direction tends to be more variable, with the frequency of wind events from the south and southwest occurring least frequently compared to other directions. This preliminary study provides the foundation for advancing the knowledge of meteorological studies, particularly wind, as they relate to hydrometeorological disasters. Abstrak Karakteristik angin dekat permukaan yang dikaitkan dengan fenomena global seperti monsun telah banyak dilakukan riset sebelumnya. Akan tetapi, kajian data angin masih sedikit ditemukan di wilayah pesisir utara Pulau Jawa. Riset ini bertujuan untuk menganalisis karakteristik angin wilayah tersebut berdasarkan variabilitas monsun. Analisis statistik dan analisis diagram wind rose dilakukan untuk data arah dan kecepatan angin tahun 2013–2022 di tiga Stasiun Meteorologi milik Badan Meteorologi, Klimatologi, dan Geofisika (BMKG) yaitu di Tanjung Priok-Jakarta Utara, Tanjung Mas-Semarang, dan Perak II-Surabaya. Hasil analisis menunjukkan bahwa selama sepuluh tahun tersebut di Jakarta Utara telah terjadi peningkatan tren kecepatan angin rata-rata tahunan, sedangkan di Semarang dan Surabaya terjadi penurunan. Saat dipengaruhi monsun timur maupun barat, kecepatan angin di Jakarta Utara dan Semarang lebih tinggi dibanding saat masa peralihan I maupun peralihan II. Akan tetapi, kecepatan angin di Surabaya saat masa peralihan II memiliki nilai rata-rata tertinggi dibandingkan saat periode monsun barat, monsun timur, maupun saat masa peralihan I. Rata-rata kecepatan angin harian di Surabaya lebih tinggi dibanding Jakarta Utara dan Semarang, namun Semarang memiliki nilai maksimum kecepatan angin yang paling tinggi di antara kedua wilayah lainnya. Dominasi arah angin terlihat mengikuti pola angin monsun baik saat terjadi monsun barat, ataupun saat terjadi monsun timur. Arah angin akan cenderung lebih beragam pada saat musim peralihan dengan frekuensi kejadian angin dari selatan maupun barat daya paling sedikit terjadi daripada arah angin lainnya. Studi awal ini sebagai dasar untuk pengayaan ilmu kajian meteorologi terutama angin untuk dikaitkan dengan bencana hidrometeorologi.

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Section: Perbandingan Karakteristik Angin Berdasarkan Periode Monsununclassified

Karakteristik Angin Wilayah Pesisir Utara Pulau Jawa Berdasarkan Variabilitas Monsun

Ma’rufatin,

Yananto,

Pandoe

2024

Jurtekling

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“…Gerakan naik turunnya air yang tegak lurus permukaan laut membentuk kurva sinusoidal. Gelombang laut biasanya disebabkan oleh angin yang mentransfer energinya ke air, menyebabkan riak dan menjadi gelombang [7].…”

Section: Pendahuluanunclassified

Media Pembangkit Gelombang Skala Laboratorium

Akmal,

Suudi,

Grahita

et al. 2023

jtm

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In the design of offshore building structures, calculations are required by looking at the factors that occur in the ocean. A big factor that occurs is the disturbance force of waves which can disrupt the strength of the building structure to be created. For this reason, this research makes a wave generating media device on a laboratory scale. With this tool, efforts are also made to resemble the original wave, where the deeper it is, the smaller the strength of the wave formed. This effort is an implementation of the wave forms that occur in the open sea. The results of the design of a wave generating media device measuring 3690x830x940 mm. From wave observations and calculations, it was found that the wavelength was 0.5m and the amplitude was 0.01m. It was concluded that the type of wave characteristic produced by this tool was categorized as an airy wave.

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“…In so far, however, the waters have not managed properly and use in optimum thus the oceanic aspect especially in fishery do not provide the useful yet and the industry is stagnant. The fisherman who living in West Sumatera just doing their activity in the near coast than high seas (Indian Ocean) bordering the coastal area, precisely in Mentawai Island (Marelsa & Oktaviandra, 2019). Meanwhile, tuna fish is growing a lot in this area has not been utilized by fisherman because they are rarely fishing into the waters beside due to the inadequate facilities.…”

Section: Introductionmentioning

confidence: 99%

Protection of Maritime Law on Fishery Zone at the Coast Border of West Sumatera

Magdariza

Najmi

2022

Andalas Intl. J. Soc. Hum.

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In the few months there is a high intensity of illegal fishing at Indonesian waters. The most potential area located in the coast border of West Sumatera facing the high seas and Indian Ocean that have long been a target from abroad fishing boats. Geographically, there are three areas located in strategic west coast of Sumatera such as Padang City, South Coast District, and Mentawai District. By the situation of opened-coast territorial geography, it is susceptible for illegal fishing of tuna by the local or abroad ships. The observed problems in this research are finding causing factors of illegal fishing in west coast of Sumatera to protect the waters environment under the local wisdom, how to implement the countermeasures of illegal fishing in the west coast of Sumatera. Moreover, there is a special attempt to find out the system and proper policy to cope with the potential happening often of illegal fishing that threatens the waters protection in west coast of Sumatera. The dominant method used in research is qualitative approach by implement two legal studies such as socio legal and normative legal study used in research on doctrines or useful principles of law. Moreover, characteristically this research categorized as the analytical descriptive.

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Analisis Karakteristik Gelombang Laut Menggunakan Software Windwave-12 (Studi Kasus : Kepulauan Mentawai)

Cited by 7 publications

References 2 publications

Karakteristik Angin Wilayah Pesisir Utara Pulau Jawa Berdasarkan Variabilitas Monsun

Karakteristik Angin Wilayah Pesisir Utara Pulau Jawa Berdasarkan Variabilitas Monsun

Media Pembangkit Gelombang Skala Laboratorium

Protection of Maritime Law on Fishery Zone at the Coast Border of West Sumatera

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