Investigation of the generation peculiarities of infragravity and edge waves in the coastal zone using the data of the field experiments

Kovalev, D. P.; Kovalev, P. D.

doi:10.30730/978-5-6040621-1-1.2018-1

Cited by 2 publications

(2 citation statements)

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“…The block diagram of the frequency meter is shown in figure 1. When conducting an experiment with several sensors, the equipment must provide the simultaneous measuring and recording of the values [6]. Usage of the personal or industrial computer could be the universal solution since modern processors have high frequency rate and software or hardware multithreading.…”

Section: Development Of the Dual-channel Frequency Meter 21 Block Diagrammentioning

confidence: 99%

Development of the dual-channel frequency meter for measurements with hydrostatic pressure sensor

Stovbun

Gulyakov

2021

IOP Conf. Ser.: Earth Environ. Sci.

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The paper describes the process and the results of development of the dual-channel frequency meter, which function is to measure the output frequency generated by bottom-mounted pressure sensors. The sensors are actively used to monitor the marine environment. AVR family microcontrollers were used as the computing core of the presented device. This solution allows to obtain far lower power consumption, which is especially important when operating with no industrial power supply system in the coastal zone. As a result, we can deploy a reliable monitoring equipment capable of long-term saving data and if necessary transmit it for further processing. The developed frequency-meter is able to continually record the ambient temperature, atmospheric pressure and dynamically varying output frequency, which depends on hydrostatic pressure (sea level). To obtain more accurate data, we implemented a frequency measure method called reciprocal counter with lower relative error not affected by value of the output frequency. A laboratory experiment has been conducted, which confirms the suitability of the developed frequency meter for field-oriented conditions.

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Section: Development Of the Dual-channel Frequency Meter 21 Block Diagrammentioning

confidence: 99%

Development of the dual-channel frequency meter for measurements with hydrostatic pressure sensor

Stovbun

Gulyakov

2021

IOP Conf. Ser.: Earth Environ. Sci.

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“…It intensifies the Helmholtz mode in it and significantly attenuates the oscillation with a period of 36 min, which, in the presence of an adjacent bay, does not appear in Bay B. As can be seen from Table. 2, if the adjacent bay is taken into account, the Helmholtz mode of Bay B prevails over the other modes in the top of Bay B (points [12][13][14], when λ is 10 and 14 km. An increase in the width of the initial disturbance area to 16 km leads to the fact that oscillation with a period of 20 min (a standing wave arising from the interaction of an incident wave with a vertical wall) begins to prevail in Bay B.…”

Section: Periods Of Eigen-oscillations In the Baysmentioning

confidence: 99%

Resonance Oscillations in the System of Adjacent Bays

Manilyuk

Lazorenko

Фомін

2019

PhO

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The paper is aimed at studying both resonance response of a system of two model bays to the initial disturbance of free surface induced by the sea bottom motion and mutual influence of the adjacent bays. Methods and Results. Based on the numerical hydrodynamic ADCIRC model, including the method of finite elements, studied is the resonance response of two adjacent bays (A and B; rectangular form, certain dimensions and depths) similar to the Sevastopol and Karantinnaya bays, respectively, to the initial disturbance of free surface induced by the sea bottom motion. The calculations were carried out at different dimensions of the initial disturbance area both for the system of two adjacent bays and individually for each bay. Conclusions. Initial disturbance generates in the Bay A four lowest modes of eigen-oscillations with the periods 45, 15, 9 and 6 min., and in the bay Btwo lowest modes with the periods 12 and 4 min. The obtained periods are in good agreement with the analytical estimates. Presence of the adjacent bay gives rise to intensification of the Helmholtz mode in each of them. External disturbance with the period 11.7 min. constitutes potential danger for the bay B since, in such a case, resonance with its Helmholtz mode occurs. The analytically obtained dependence between the periods of the infragravity waves and the average periods of the wind waves in the Sevastopol region (resulted from the retrospective analysis of waves) permitted to reveal theoretical possibility of generating shortperiod seiches by the infra-gravity waves in both bays.

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Investigation of the generation peculiarities of infragravity and edge waves in the coastal zone using the data of the field experiments

Cited by 2 publications

References 0 publications

Development of the dual-channel frequency meter for measurements with hydrostatic pressure sensor

Development of the dual-channel frequency meter for measurements with hydrostatic pressure sensor

Resonance Oscillations in the System of Adjacent Bays

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