The amplitudes and phases of tidal constituents from Harmonic Analysis at two stations in the Gulf of Aden

Madah, Fawaz

doi:10.1007/s41748-020-00152-y

Cited by 12 publications

(7 citation statements)

References 10 publications

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“…This was followed by tidal analysis which focused on using LSM to disentangle harmonic constants of constituents. Similar research on tidal analysis and prediction using observed tidal series has been conducted by Madah [35] using observed tidal series from two tidal stations in the Gulf of Aden. The harmonic constants found using LSM were applied to generate the predicted 19 years of tidal series data which was slightly longer than the18.6 year lunar nodal cycle.…”

Section: Introductionmentioning

confidence: 69%

Analysis and Prediction of Tidal Measurement Data from Temporary Stations using the Least Squares Method

Rusdin,

Oshikawa,

Divanesia

et al. 2024

Civ Eng J

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This research was conducted by equipping three temporary tidal stations located in three places inside Palu Bay with pressure-type tidal gauges. The stations recorded tidal series fluctuations for 4 months with a 5-minute sampling interval (Dt). Moreover, the simple and widely used least squares method (LSM) was applied to separate the harmonic constants of constituents, including amplitudes (Hi) and phases (gi), from the observed tidal series. A total of 11 dominant constituents were selected based on the largest magnitudes of tidal generating potential (CE), and these include M2, K1, S2, O1, P1, N2, Mf, K2, Mm, Q1, and Msf, which were diurnal, semidiurnal, and long-period constituents. The results showed that the semidiurnal constituents generated higher amplitudes than the diurnal constituents, while the long-period constituents produced quite small amplitudes. Furthermore, the ratios of amplitudes recorded showed that tidal in Palu Bay was mainly mixed with semidiurnal constituents. The difference between the observed and predicted values was quite small, and this showed the validity of the measurement conducted at the temporary tidal stations. The performance indicators applied also showed that LSM had acceptable accuracy compared to other methods. Moreover, tidal datums were calculated using the peak approach, and the average tidal range (RA) of Palu Bay was found to be 2.39 m. Doi: 10.28991/CEJ-2024-010-02-03 Full Text: PDF

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Section: Introductionmentioning

confidence: 69%

Analysis and Prediction of Tidal Measurement Data from Temporary Stations using the Least Squares Method

Rusdin,

Oshikawa,

Divanesia

et al. 2024

Civ Eng J

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“…The observation period for one year from 1-Jan-2015 to 31-Dec-2015. The duration of the observation period of one year (365 days) is sufficient to perform harmonic analysis and obtain the main components (Madah, 2020). Time-series of data elevation is obtained from BOOST (Babel Ocean Observation and Technologies).…”

Section: Methodsmentioning

confidence: 99%

The amplitudes and phases of tidal constituents from Harmonic Analysis at two stations in the Gaspar Strait of Bangka Belitung

et al. 2022

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The waters of the Bangka Belitung islands are shallow waters that are affected by tides. The tides in these waters originate from the propagation of the Natuna and Java Seas, so they have unique characteristics. This study aims to analyze the amplitude and phase difference at 2 stations representing Bangka and Belitung Islands with the final output of LAT and HAT information as marine cadastral recommendations at Tanjung Pesona and Tanjung Tinggi stations and safe depths for ports in PPN Sungailiat and PPN Tanjung Pandan. . Tidal data for 1 year with time intervals of 1 hour in 2015 were used to extract the harmonic components to determine the type of tide and calculate the tidal level at each station. The results obtained are 19 harmonic components with a diurnal tide type. The water level at Tanjung Pesona is higher than the high Tanjung, which is described by tidal levels with HAT 2.64 and 1.72 m. Safe depth of harbor pond. In the LAT condition (lowest recess), the water level at Tanjung Pesona station is above the Sungailiat PPN pool's maximum depth; on the other hand, the Tanjung Pandan PPN LAT is 0.44 m below the maximum depth of the port pool.Key Word: Bangka Belitung, chart datum, LAT, HAT, tidal level

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“…where, 0 is the height of mean water level above the datum, and are the tidal constituent amplitudes, represents the tidal frequencies, h(t) denotes the height of the tide at time t, and N is the number of tidal constituents selected for tidal analysis [13], [15]. Having instantaneous water level records in a location, tidal constituent amplitudes can be calculated, for tidal prediction.…”

Section: Materials and Methods 21 Tidal Prediction With Harmonic Anmentioning

confidence: 99%

The choice between Radial Basis function and Feed Forward Neural Network to predict long term tidal condition

Motamedi

Rahbani

Harifi

et al. 2020

ijcoe

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The amplitudes and phases of tidal constituents from Harmonic Analysis at two stations in the Gulf of Aden

Cited by 12 publications

References 10 publications

Analysis and Prediction of Tidal Measurement Data from Temporary Stations using the Least Squares Method

Analysis and Prediction of Tidal Measurement Data from Temporary Stations using the Least Squares Method

The amplitudes and phases of tidal constituents from Harmonic Analysis at two stations in the Gaspar Strait of Bangka Belitung

The choice between Radial Basis function and Feed Forward Neural Network to predict long term tidal condition

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