An Analysis of Surface Ocean Currents from HF Radar Measurements in the Bali Strait and the Flores Sea, Indonesia

Supriyadi, Eko; Hidayat, Rahmat; Santikayasa, I Putu; Ramdhani, Andri

doi:10.18517/ijaseit.11.4.14265

Cited by 5 publications

(12 citation statements)

References 52 publications

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“…The reasons for the low observation accuracy are mainly the limitations of the instrument's observation mechanism, signal processing and data inversion methods. Therefore, the quality control of single-station radial data of ground wave radar and the improvement of inversion algorithm should be strengthened to reduce the error between ground wave radar observation results and actual currents [10]. The most practical methods include strengthening the analysis and processing of ground wave radar data, identifying the causes of errors and improving the inversion algorithm of ground wave radar to improve the accuracy of ground wave radar observations and data availability.…”

Section: Carrying Out Inversion Algorithm Study To Improve Radar Dete...mentioning

confidence: 99%

Review of the research on the application of ground wave radar current detection in China

Liu

Yang

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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As an effective new type of marine exploration equipment with high measurement accuracy, high spatial resolution and high repetitive sampling frequency, ground wave radar is widely used in the field of marine environment exploration around the world. This paper introduces the current status of international ground wave radar development and the operation of ground wave radar sea current detection in China. Then the current status of current observation date’s application of Chinese ground wave radar is described from four research directions, including tidal current prediction, calibration and validation, data quality control and numerical simulation. Finally, the development trend of ground wave radar is briefly analysed.

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Section: Carrying Out Inversion Algorithm Study To Improve Radar Dete...mentioning

confidence: 99%

Review of the research on the application of ground wave radar current detection in China

Liu

Yang

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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“…These small islands act as a barrier that disrupts the dominant current pattern, especially in the eastern part of Komodo Island [11]. Offshore, deep bathymetry causes currents to move more smoothly than in shallow waters [10]. The difference in movement between the current directions in offshore and shallow waters is caused by the influence of dominance on the causal factors [10].…”

Section: Spatial Pattern Of Current Movementmentioning

confidence: 99%

“…Analysis of the results of the current processing can be used to improve shipping safety and reduce the number of ship accidents in Labuan Bajo waters. Furthermore, the HF radar can read waves and wind, allowing it to be used as an early warning system for tsunamis or other severe weather conditions [10]. The purpose of this study was to map surface current patterns spatially and temporally and identify the influence of wind and tides in generating surface currents in the waters around Labuan Bajo from October to December 2018 using data from HF radar.…”

Section: Introductionmentioning

confidence: 99%

Study of Driving Force and Surface Current Patterns in Labuan Bajo from High Frequency Radar data from October to December 2018

Baharsyah,

Hakim,

Ramdhani

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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Surface ocean current data in Labuan Bajo from October to December 2018 for determine the characteristics of the surface current and identify the influence of wind and tides in generating surface current. The current data set is derived from measurements of high frequency (HF) radar, which operates on the electromagnetic wave spectrum at high frequency or short wave. Method of data analysis by processing surface current velocity and direction of the zonal and meridional into spatial and temporal graphs. The result showed the average current speed in October was 0.13 m/s, the average current speed in November was 0.12 m/s, and the average current speed in December was 0.09 m/s. The empirical orthogonal function (EOF) Mode 1 has a variance of 56.2% because of the tides, Mode 2 has a variance of 26.6% because of bi-weekly variability, and Mode 3 has a variance of 17.2% because of the intra-seasonal period. This shows that tides have a greater influence on the study region than any other driving force. These results are intended to be useful to the public, particularly in terms of sustainable coastal marine management in Labuan Bajo. Especially in terms of preventing boat accidents caused by ocean currents.

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“…Perbandingan analisis statistik antara kecepatan arus laut permukaan dari HF Radar dan ADCP dengan lowpass filter 36 jam, didapatkan nilai RMSE dan IA 6,4 cm/s dan 0,99. Berdasarkan perhitungan tersebut, dapat disimpulkan bahwa output arus laut pengukuran HF Radar hasilnya hampir sesuai dengan pengukuran di lapangan dan dapat digunakan untuk mempelajari karakteristik arus laut permukaan di Selat Bali (Supriyadi et al, 2021).…”

Section: Materi Dan Metodeunclassified

“…Di wilayah Selat Bali, penelitian arus permukaan dengan data HF Radar dilakukan oleh Setiawan (2020) pada musim barat yaitu Desember -Februari dan oleh Firdaus et al, (2021) yang hanya dilakukan pada bulan Juli tahun 2020. Supriyadi et al (2021) menyatakan bahwa pada bulan Juni, Juli, Agustus (musim timur) di Selat Bali memiliki kecepatan arus yang lebih tinggi dari bulan -bulan lainnya. Hal ini akan berpengaruh terhadap penentuan jalur pelayaran antara pelabuhan di Selat Bali.…”

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Karakteristik Arus Laut Permukaan dari High Frequency Radar pada Musim Timur di Selat Bali

2022

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Bali Strait has many activities in port and water, such as passenger and freight transportation, tourism, and fisheries. Oceanographic conditions, especially sea surface current (SSC), affect the smoothness of ports and shipping activities in the Bali Strait. High-Frequency Radar (HF Radar) has the advantage of monitoring and mapping surface currents and ocean waves with high resolution. Because of the narrow strait area, HF Radar is very beneficial in describing the characteristics of SSC in the Bali Strait. Therefore, HF Radar data is used to describe the dynamics of SSC in the Bali strait, especially in ship crossing lane, with a temporal approach during Southeast Monsoon, June to August 2020. This study was conducted for 15 days each month which included neap tide and spring tide. Surface current charts are created to analyze the pattern of temporal SSC against the wind, tides, and their components. The results showed In the southeast monsoon, the average current speed at the research site ranged from 0.1 – 1.08 m/s. The direction of the surface current is predominantly towards the south. The characteristics of surface currents in the Bali Strait are influenced by tides, sea level anomalies, and coastal morphology. Temporally, the speed of the current is greater during the ebb phase and when the spring tide. Spatially, the central region of the Bali Strait waters has a greater current speed. Knowledge of areas and times with higher current speeds can be the basis for determining the shipping lane between ports in the Bali Strait. Selat Bali memiliki banyak kegiatan di pelabuhan dan perairan, seperti transportasi penumpang dan barang, pariwisata, serta perikanan. Kondisi oseanografi, khususnya arus permukaan laut, mempengaruhi kelancaran pelabuhan dan aktivitas pelayaran di Selat Bali. High-Frequency Radar (HF Radar) memiliki keunggulan pemantauan dan pemetaan arus permukaan dan gelombang laut dengan resolusi tinggi. Karena wilayah selat yang sempit, HF Radar sangat bermanfaat dalam menggambarkan karakteristik arus permukaan laut di Selat Bali. Oleh karena itu, data HF Radar digunakan untuk menggambarkan dinamika arus permukaan laut di jalur penyeberangan Selat Bali dengan pendekatan temporal pada musim timur, bulan Juni hingga Agustus 2020. Penelitian ini dilakukan selama 15 hari tiap bulan yang mencakup waktu pasang purnama dan pasang perbani. Grafik arus permukaan dibuat untuk menganalisis pola arus permukaan laut secara temporal ketika musim timur terhadap angin, pasang surut dan komponennya. Hasil menunjukkan pada musim timur, rata – rata kecepatan arus di lokasi penelitian berkisar antara 0.1 – 1.08 m/s. Arah arus permukaan dominan ke arah selatan. Karakteristik arus permukaan di Selat Bali di pengaruhi oleh pasang surut, sea level anomaly dan morfologi pantai. Secara temporal, kecepatan arus lebih besar ketika menuju surut dan ketika pasang purnama. Secara spasial, wilayah tengah perairan Selat Bali memiliki kecepatan arus yang lebih besar. Pengetahuan mengenai wilayah perairan dan waktu – waktu dengan kecepatan arus yang tinggi dapat menjadi dasar dalam penentuan alur pelayaran antar pelabuhan di Selat Bali.

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An Analysis of Surface Ocean Currents from HF Radar Measurements in the Bali Strait and the Flores Sea, Indonesia

Cited by 5 publications

References 52 publications

Review of the research on the application of ground wave radar current detection in China

Review of the research on the application of ground wave radar current detection in China

Study of Driving Force and Surface Current Patterns in Labuan Bajo from High Frequency Radar data from October to December 2018

Karakteristik Arus Laut Permukaan dari High Frequency Radar pada Musim Timur di Selat Bali

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