Run-up and inundation generated by non-decaying dam-break bores on a planar beach
Non-decaying bores are generated in a laboratory using a dam-break system with different reservoir length and depth ratios at the dam-break gate. The experimental data show the dependency of inundation depth, run-up height and flood duration on the reservoir length and the bore strength at the beach...
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| Veröffentlicht in: | Journal of fluid mechanics 2021-03, Vol.915, Article A81 |
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| creator | Barranco, Ignacio Liu, Philip L.-F. |
| description | Non-decaying bores are generated in a laboratory using a dam-break system with different reservoir length and depth ratios at the dam-break gate. The experimental data show the dependency of inundation depth, run-up height and flood duration on the reservoir length and the bore strength at the beach toe. Employing the method of characteristics, the relationship between the reservoir length and the bore characteristics at beach toe is obtained. Numerical simulations are carried out for a series of dam-break generated bores, extending the range of physical parameters used in the laboratory experiments. The accuracy of the numerical results is confirmed by the experimental data. Predictive formulae are then obtained for the inundation depth, run-up height and flood duration in terms of the bore characteristics at beach toe and beach slope. Finally, the minimum bore lengths at beach toe necessary to produce the maximum inundation depths and the flooding plateau are identified in the parameter space. These relations can be employed to design dam-break experiments for generating bores with a target length or duration. |
| doi_str_mv | 10.1017/jfm.2021.98 |
| format | Article |
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The experimental data show the dependency of inundation depth, run-up height and flood duration on the reservoir length and the bore strength at the beach toe. Employing the method of characteristics, the relationship between the reservoir length and the bore characteristics at beach toe is obtained. Numerical simulations are carried out for a series of dam-break generated bores, extending the range of physical parameters used in the laboratory experiments. The accuracy of the numerical results is confirmed by the experimental data. Predictive formulae are then obtained for the inundation depth, run-up height and flood duration in terms of the bore characteristics at beach toe and beach slope. Finally, the minimum bore lengths at beach toe necessary to produce the maximum inundation depths and the flooding plateau are identified in the parameter space. These relations can be employed to design dam-break experiments for generating bores with a target length or duration.</description><identifier>ISSN: 0022-1120</identifier><identifier>EISSN: 1469-7645</identifier><identifier>DOI: 10.1017/jfm.2021.98</identifier><language>eng</language><publisher>Cambridge, UK: Cambridge University Press</publisher><subject>Beach slope ; Beaches ; Dam engineering ; Dam failure ; Dams ; Depth ; Duration ; Experimental data ; Experiments ; Flooding ; Floods ; Flow velocity ; Fluid mechanics ; Height ; JFM Papers ; Laboratories ; Length ; Method of characteristics ; Numerical analysis ; Parameter identification ; Physical properties ; Propagation ; Reservoirs ; Tsunamis</subject><ispartof>Journal of fluid mechanics, 2021-03, Vol.915, Article A81</ispartof><rights>The Author(s), 2021. Published by Cambridge University Press.</rights><rights>The Author(s), 2021. Published by Cambridge University Press. This work is licensed under the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/ (the “License”). 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Fluid Mech</addtitle><description>Non-decaying bores are generated in a laboratory using a dam-break system with different reservoir length and depth ratios at the dam-break gate. The experimental data show the dependency of inundation depth, run-up height and flood duration on the reservoir length and the bore strength at the beach toe. Employing the method of characteristics, the relationship between the reservoir length and the bore characteristics at beach toe is obtained. Numerical simulations are carried out for a series of dam-break generated bores, extending the range of physical parameters used in the laboratory experiments. The accuracy of the numerical results is confirmed by the experimental data. Predictive formulae are then obtained for the inundation depth, run-up height and flood duration in terms of the bore characteristics at beach toe and beach slope. Finally, the minimum bore lengths at beach toe necessary to produce the maximum inundation depths and the flooding plateau are identified in the parameter space. 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Fluid Mech</addtitle><date>2021-03-19</date><risdate>2021</risdate><volume>915</volume><artnum>A81</artnum><issn>0022-1120</issn><eissn>1469-7645</eissn><abstract>Non-decaying bores are generated in a laboratory using a dam-break system with different reservoir length and depth ratios at the dam-break gate. The experimental data show the dependency of inundation depth, run-up height and flood duration on the reservoir length and the bore strength at the beach toe. Employing the method of characteristics, the relationship between the reservoir length and the bore characteristics at beach toe is obtained. Numerical simulations are carried out for a series of dam-break generated bores, extending the range of physical parameters used in the laboratory experiments. The accuracy of the numerical results is confirmed by the experimental data. Predictive formulae are then obtained for the inundation depth, run-up height and flood duration in terms of the bore characteristics at beach toe and beach slope. Finally, the minimum bore lengths at beach toe necessary to produce the maximum inundation depths and the flooding plateau are identified in the parameter space. These relations can be employed to design dam-break experiments for generating bores with a target length or duration.</abstract><cop>Cambridge, UK</cop><pub>Cambridge University Press</pub><doi>10.1017/jfm.2021.98</doi><tpages>29</tpages><orcidid>https://orcid.org/0000-0002-2170-5507</orcidid><orcidid>https://orcid.org/0000-0001-6506-7626</orcidid><oa>free_for_read</oa></addata></record> |
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| subjects | Beach slope Beaches Dam engineering Dam failure Dams Depth Duration Experimental data Experiments Flooding Floods Flow velocity Fluid mechanics Height JFM Papers Laboratories Length Method of characteristics Numerical analysis Parameter identification Physical properties Propagation Reservoirs Tsunamis |
| title | Run-up and inundation generated by non-decaying dam-break bores on a planar beach |
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