Study of Dam-break Due to Overtopping of Four Small Dams in the Czech Republic

Dam-break due to overtopping is one of the most common types of embankment dam failures. During the floods in August 2002 in the Czech Republic, several small dams collapsed due to overtopping. In this paper, an analysis of the dam break process at the Luh, Velký Bělčický, Melín, and Metelský dams breached during the 2002 flood is presented. Comprehensive identification and analysis of the dam shape, properties of dam material and failure scenarios were carried out after the flood event to assemble data for the calibration of a numerical dam break model. A simple one-dimensional mathematical model was proposed for use in dam breach simulation, and a computer code was compiled. The model was calibrated using the field data mentioned above. Comparison of the erodibility parameters gained from the model showed reasonable agreement with the results of other authors.

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OVERVIEW OF AIRCREW EXPOSURE TO COSMIC RADIATION IN THE CZECH REPUBLIC

Radiation Protection Dosimetry ◽

10.1093/rpd/ncz204 ◽

2019 ◽

Vol 186 (2-3) ◽

pp. 211-214

Author(s):

Ján Kubančák ◽

Dagmar Kyselová ◽

Ivan Kovář ◽

Magdaléna Hlaváčová ◽

Ronald Langer ◽

...

Keyword(s):

Czech Republic ◽

Effective Dose ◽

Cosmic Radiation ◽

Computer Code ◽

Crew Member ◽

Relative Uncertainty ◽

The Czech Republic ◽

Effective Doses ◽

The Individual

Abstract Monitoring of exposures of aircrew members of airline operators registered in the Czech Republic has been performed since 1998. The individual effective doses are calculated using the computer code CARI annually. The calculations are based on information about participation of aircrew members on the specific flights and on the parameters describing the typical flight profiles of the flights; the latter is regularly verified with control measurements performed onboard aircraft. The results show that (1) the average annual effective doses in the period from 1998 to 2017 range from 1.3 to 2.1 mSv, (2) the maximum effective dose of a crew member is 5.7 mSv and (3) the annual collective effective doses range from 1.3 to 4.1 manSv. Combined relative uncertainty of the results is ~25%.

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Aspects aléatoires de l'érosion d'une digue : simulations de la brèche par des algorithmes génétiques

Canadian Journal of Civil Engineering ◽

10.1139/l04-097 ◽

2004 ◽

Vol 31 (6) ◽

pp. 927-942 ◽

Cited By ~ 2

Author(s):

Ousmane Seidou ◽

Claude Marche ◽

Tewfik Mahdi

Keyword(s):

Field Data ◽

Energy Dissipation Rate ◽

Dam Break ◽

Random Component ◽

Dam Breach ◽

Geotechnical Parameters ◽

Uncertainty Sources ◽

Hydraulic Conditions ◽

Dam Break Flow ◽

Flow Evolution

Attempts to forecast the final form of a dam-break suffer from various uncertainty sources such as field data (topography, hydraulic and geotechnical parameters), and modeling assumptions. So the result seems to be at least partially chaotic and difficult to match with the objectives of the dam-safety engineers in which the goal is to model dam-break flow evolution in time. On the other hand, the principle of minimal energy dissipation rate makes it possible to predict the shape towards which the geometry of the breach will evolve to under stationary hydraulic conditions. In this article, one uses energy minimization by a genetic algorithm to integrate at the same time the two concepts of random result and convergence towards an equilibrium state. They are used to simulate the submersion failure of a clay dam, and the results agree reasonably with the field data. This approach makes it possible to obtain as realistic breach shapes as those obtained by actual models, and to introduce a random component in the process of dam-breach formation, which remains, however, guided by a physical principle.Key words: erosion, dam breach, genetic algorithms, sediment transport.

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Appendix 1. Case Study: Methanol Mass Poisoning Outbreak in the Czech Republic: Diagnosis, Treatment and Outcome

Chemical Health Threats - Issues in Toxicology ◽

10.1039/9781782623687-00263 ◽

2018 ◽

pp. 263-270

Author(s):

Sergej Zacharov ◽

Daniela Pelclova

Keyword(s):

Czech Republic ◽

The Czech Republic

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Social variation in size at birth and preterm delivery in the Czech Republic and Sweden, 1989-91

Paediatric and Perinatal Epidemiology ◽

10.1046/j.1365-3016.1998.00075.x ◽

1998 ◽

Vol 12 (1) ◽

pp. 7-24 ◽

Cited By ~ 1

Author(s):

Koupilova ◽

Vagero ◽

Leon ◽

Pikhart ◽

Prikazsky ◽

...

Keyword(s):

Czech Republic ◽

Preterm Delivery ◽

The Czech Republic ◽

Social Variation ◽

Size At Birth

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On Geropsychology in the Czech Republic

GeroPsych ◽

10.1024/1662-9647/a000066 ◽

2012 ◽

Vol 25 (3) ◽

pp. 161-166

Author(s):

Hana Stepankova ◽

Eva Jarolimova ◽

Eva Dragomirecka ◽

Irena Sobotkova ◽

Lenka Sulova ◽

...

Keyword(s):

Czech Republic ◽

Clinical Practice ◽

Old Age ◽

Cognitive Rehabilitation ◽

The Czech Republic ◽

Rehabilitation Research

This work provides an overview of psychology of aging and old age in the Czech Republic. Historical roots as well as recent activities are listed including clinical practice, cognitive rehabilitation, research, and the teaching of geropsychology.

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