Publication detail

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

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

Journal of Hydrology and Hydromechanics

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

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"
}