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Titel |
Modelling of wind waves on the lake-like basin of Gorky Reservoir with WAVEWATCH III |
VerfasserIn |
Yuliya Troitskaya, Alexandra Kuznetsova, Dmitry Zenkovich, Vladislav Papko, Alexander Kandaurov, Georgy Baidakov, Maxim Vdovin, Daniil Sergeev |
Konferenz |
EGU General Assembly 2014
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Medientyp |
Artikel
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Sprache |
Englisch
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Digitales Dokument |
PDF |
Erschienen |
In: GRA - Volume 16 (2014) |
Datensatznummer |
250090795
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Publikation (Nr.) |
EGU/EGU2014-5053.pdf |
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Zusammenfassung |
Simulation of ocean waves and sea waves is nowadays a generally adopted technique of
operational meteorology. Such well-known models as WAVEWATCH, WAM, SWAM are
aimed primarily at describing ocean waves including coastal (nearshore) zones. Meanwhile,
wave modelling is less developed for moderate and small inland water reservoirs and lakes,
though being of considerable interest for inland navigation.
In this paper test numerical experiments on simulating waves on the lake-like basin of the
Gorky Reservoir using WAVEWATCH III are reported. We aimed to evaluate the
applicability of the model to the waves on a mid-sized inland reservoir.
Gorky Reservoir is an artificial lake in the central part of the Volga River formed by a
hydroelectric dam of Gorky Hydroelectric Station between the towns of Gorodets and
Zavolzhye. It spans for 427 km from the dam of Rybinsk to the dam of Gorodets through
several regions of Central Russia. While it is relatively narrow and follows the natural
riverbed of Volga in the upper part, it becomes up to 15 km wide downstream the town of
Yuryevets. Its maximum depth is 22 m, the surface area is 1590 km2, the accumulated water
volume amounts to 8.71 km3.
In the series of calculations we considered moderate winds of different directions blowing
steadily all over the surface of the reservoir and the waves developing from calm conditions
or from some initial seeding spectral distribution that is Gaussian in frequency and space,
cosine in direction.
The results of wave simulation are compared then with the data collected by the field
in-situ observations and measurements. The field experiments were carried out in the south
part of the Gorky reservoir from the boat. In the course of the experiment we simultaneously
measured profiles of wind speed and surface wave spectra using instruments placed on the
Froude buoy, which measures the following parameters: i) the module and the direction of the
wind speed using ultrasonic wind sensor WindSonic Gill instruments, located on the 4
levels from 0.1 to 5 m long; ii) profile of the surface waves with 3-channel string
wave-gauge with the base of 5 cm, iii) the temperature of the water and air with a
resistive sensor. 3D spectra of surface waves were retrieved by Fourier dimensional
method developed in [1]. Wind velocity parameters (wind friction velocity and
roughness height) were retrieved from wind velocity profiles averaged over 10
minutes.
To conclude, we discuss applicability of the several parameterizations for the wave action
source terms available in WAVEWATCH III.
The work was supported by the Russian Foundation for Basic Research under Grant No.
13-05-97068.
Reference
[1] Troitskaya, Y. I., D. A. Sergeev, A. A. Kandaurov, G. A. Baidakov, M. A. Vdovin, and
V. I. Kazakov “Laboratory and theoretical modeling of air-sea momentum transfer under
severe wind conditions” J. Geophys. Res., 117, C00J21, 2012. |
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