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KOTAŠKA, S. DUCHAN, D. PELIKÁN, P. ŠPANO, M.
Original Title
Spectral analysis of oscillatory wind wave parameters in fetch-limited deep-water conditions at a small reservoir and their prediction: Case Study of the Hulín Reservoir in the Czech Republic
Type
journal article in Web of Science
Language
English
Original Abstract
The dams and banks of small water reservoirs face significant erosion from wind-generated oscillatory waves. Proper design of structure height is crucial to protect such banks against erosion, considering the maximum characteristics of wind waves. Long-term measurements at the Hulín reservoir revealed that the wave spectrum aligns best with the Bretschneider type. This spectrum serves as a basis for simulating oscillatory waves and their impact on shore protection structure design. Empirical models were evaluated using wind and wave data from Hulín reservoir in the Czech Republic. The measured wind speeds attained a maximum of 8 m/s, and wave heights reached up to 15 cm. The Bretschneider (SMB) empirical formula provided the most accurate estimation of wave height (Hm0), with an average underestimate of RMSE = 0.038 m. On the other hand, Wilson revisited (WIL rev.) performed less effectively, with an average RMSE = 0.304 m. For wave period (T) estimation, Bretschneider (SMB) yielded the best results, with an average RMSE = 0.062 s. Conversely, Wilson revisited (WIL rev.) showed poorer performance, with an average underestimate of RMSE = 2.196 s. The discrepancy between the empirical formulas and measured values, particularly in underestimating Hm0, can be attributed to inaccurate determination of fetch length and wind speed.
Keywords
Oscillatory waves; Spectral analysis; Spectral density; Small closed reservoir; Wave prediction.
Authors
KOTAŠKA, S.; DUCHAN, D.; PELIKÁN, P.; ŠPANO, M.
Released
1. 2. 2024
Publisher
Sciendo
Location
Bratislava, Slovak Republic
ISBN
1338-4333
Periodical
Journal of Hydrology and Hydromechanics
Year of study
72
Number
1
State
Slovak Republic
Pages from
95
Pages to
112
Pages count
17
URL
http://www.uh.sav.sk/jhh/Find-Issues/All-Issues?kod=72,1
Full text in the Digital Library
http://hdl.handle.net/11012/245499
BibTex
@article{BUT187675, author="Stanislav {Kotaška} and David {Duchan} and Petr {Pelikán} and Miroslav {Špano}", title="Spectral analysis of oscillatory wind wave parameters in fetch-limited deep-water conditions at a small reservoir and their prediction: Case Study of the Hulín Reservoir in the Czech Republic", journal="Journal of Hydrology and Hydromechanics", year="2024", volume="72", number="1", pages="95--112", doi="10.2478/johh-2023-0042", issn="1338-4333", url="http://www.uh.sav.sk/jhh/Find-Issues/All-Issues?kod=72,1" }