<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><p>One of the basic questions related to the safety of dikes and river levees is the size of the freeboard. One of the important parameters for freeboard design is the height of waves and wave run-up on levee slopes. Routine and standardised calculations of wave run-up deal with the freeboards of dams where wind waves originate on the still water of the reservoir. In the case of running water in streams (thereinafter only "currents") the effect of wave and current interaction on wave run-up is usually not taken into account due to the lack of reliable knowledge regarding the phenomenon. In the Czech Republic this question is topical in the case of large rivers such as the Elbe, the Vltava and the Morava. Within the framework of the projects Hydralab III and NAZV QI 92A139, hydraulic research and further analysis focused on wave run-up as a result of the combination of current and wind wave parameters were performed. The laboratory research was carried out in a hydraulic flume with a wavemaker on the right bank and a levee with a slope of 1:3 installed on the left bank opposite the wavemaker. Waves were generated both perpendicular and oblique to the levee axis; the angle of oblique wave attack varied within the range of ± 30°. The aim of this paper is to compare the results of the mentioned research with recommendations mentioned in the Czech National Standard CSN 75 0255 <italic>Calculation of wave effects on water structures</italic> and to quantify the effect of current on the wave run-up height.</p></abstract>

One of the basic questions related to the safety of dikes and river levees is the size of the freeboard. One of the important parameters for freeboard design is the height of waves and wave run-up on levee slopes. Routine and standardised calculations of wave run-up deal with the freeboards of dams where wind waves originate on the still water of the reservoir. In the case of running water in streams (thereinafter only "currents") the effect of wave and current interaction on wave run-up is usually not taken into account due to the lack of reliable knowledge regarding the phenomenon. In the Czech Republic this question is topical in the case of large rivers such as the Elbe, the Vltava and the Morava. Within the framework of the projects Hydralab III and NAZV QI 92A139, hydraulic research and further analysis focused on wave run-up as a result of the combination of current and wind wave parameters were performed. The laboratory research was carried out in a hydraulic flume with a wavemaker on the right bank and a levee with a slope of 1:3 installed on the left bank opposite the wavemaker. Waves were generated both perpendicular and oblique to the levee axis; the angle of oblique wave attack varied within the range of ± 30°. The aim of this paper is to compare the results of the mentioned research with recommendations mentioned in the Czech National Standard CSN 75 0255 Calculation of wave effects on water structures and to quantify the effect of current on the wave run-up height.

The Influence of Current on the Height of Wind Wave Run-Up: A comparison of experimental results with the Czech National Standard

Faculty of Civil Engineering, Water Structures Institute, The Brno University of Technology, Veveří 95, Brno 602 00, Czech Republic

Journal of Hydrology and Hydromechanics

One of the basic questions related to the safety of dikes and river levees is the size of the freeboard. One of the important parameters for freeboard design...

The Influence of Current on the Height of Wind Wave Run-Up: A comparison of experimental results with the Czech National Standard

Pubblicato online: 30 ago 2012

Pagine: 174 - 184

DOI: https://doi.org/10.2478/v10098-012-0015-2

Parole chiave
ochranná hráz, hrázka, větrová vlna, výška vlny, výběh vlny, proudění, návrh převýšení

This content is open access.

The Influence of Current on the Height of Wind Wave Run-Up: A comparison of experimental results with the Czech National Standard

Pubblicato online: 30 ago 2012

Pagine: 174 - 184

DOI: https://doi.org/10.2478/v10098-012-0015-2

Parole chiaveochranná hráz, hrázka, větrová vlna, výška vlny, výběh vlny, proudění, návrh převýšení

This content is open access.

Parole chiave
ochranná hráz, hrázka, větrová vlna, výška vlny, výběh vlny, proudění, návrh převýšení