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ŘÍHA, J. KOTAŠKA, S. PETRULA, L.
Original Title
Dam Break Modeling in a Cascade of Small EarthenDams: Case Study of the Cizina River in the Czech Republic
Type
journal article in Web of Science
Language
English
Original Abstract
Failures of small dams can pose a serious threat to people and property even if the size of the schemes is relatively low. In many cases, small dams are situated in a cascade along streams, meaning that the failure of the uppermost dam may cause the dams downstream to fail. In this paper, a cascade of three small reservoirs, Lichnov II (14.6 m high), Lichnov III (10 m high), and Pochen (8.5 m high), is the subject of the dam break analyses carried out via various methods such as empirical formulae, analogy, and hydraulic modeling. The dam-break flood routing was simulated using a shallow water flow hydraulic model. The simulations confirm that the attenuation effect of the peak discharge is governed by the flood volume, slope, and morphology of the floodplain and increases with the distance from the breached dam following an approximately exponential trend. When estimating peak discharge, empirical formulae derived for a single dam break should be applied carefully as they may underestimate the peak outflow by up to 10% in the case of a dam cascade. The attenuation volume of small reservoirs is small when compared to the flood volume, meaning that the attenuation of the peak discharge usually varies between 5–10%.
Keywords
dam break; dam overtopping; internal erosion; cascade of dams; erodibility
Authors
ŘÍHA, J.; KOTAŠKA, S.; PETRULA, L.
Released
17. 8. 2020
Publisher
MDPI
Location
Basel, Switzerland
ISBN
2073-4441
Periodical
Water
Year of study
12
Number
8
State
Swiss Confederation
Pages from
1
Pages to
21
Pages count
URL
https://www.mdpi.com/2073-4441/12/8/2309
Full text in the Digital Library
http://hdl.handle.net/11012/194870
BibTex
@article{BUT164787, author="Jaromír {Říha} and Stanislav {Kotaška} and Lubomír {Petrula}", title="Dam Break Modeling in a Cascade of Small EarthenDams: Case Study of the Cizina River in the Czech Republic", journal="Water", year="2020", volume="12", number="8", pages="1--21", doi="10.3390/w12082309", issn="2073-4441", url="https://www.mdpi.com/2073-4441/12/8/2309" }