Dinamika Seas dan Swell dari Laut China Selatan ke Teluk Jakarta: Studi Kasus Kejadian Badai Hagibis, November 2007
DOI:
https://doi.org/10.5614/jts.2019.26.1.8Keywords:
Seas, swell, model spektrum gelombang, rob, tinggi gelombang signifikan, Laut Cina Selatan - Teluk JakartaAbstract
Karakteristik dinamika seas dan swell di sepanjang perairan Laut China Selatan-Teluk Jakarta pada waktu terjadi Badai Hagibis (18"?27 November 2007) dikaji dengan menggunakan metode pemodelan spektrum gelombang untuk mengetahui kontribusi gelombang yang dibangkitkan angin (gelombang angin) terhadap kejadian rob tanggal 25 November 2007 di pantai utara Jakarta. Pada penelitian ini, dilakukan pula uji coba simulasi model spektrum gelombang yang mengacu pada kedalaman tetap (batimetri) dan pada kedalaman total (jumlah batimetri dan pasang surut astronomis) untuk mengetahui pengaruh pasang surut astronomis terhadap hasil simulasi model gelombang yang dibangkitkan angin. Hasil simulasi menunjukkan bahwa gelombang angin di Teluk Jakarta pada tanggal 25 November 2007 didominasi oleh swell dengan tinggi gelombang ~11 cm yang diduga berasal dari Laut China Selatan sebagai daerah pembangkitan badai.
Characteristics of seas and swell dynamics along South China Sea-Jakarta Bay waters during Cyclone Hagibis passage (18"?27 November 2007) have been studied using a spectral wave model to understand the magnitude of wind wave contribution to flooding event on November 25, 2007 along the northern coast of Jakarta. In this study, the model simulation was conducted using two kinds of water depth input, namely fixed water depth and timevarying water depths resulting from tides in order to obtain a better understanding of tidal influence on wind wave simulations. The simulated result shows that wind wave in the Jakarta Bay was dominated by swell with significant wave height of ~11 cm. It was expected that the swell propagated from the South China Sea as a storm generating area.
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