Dam Break Modeling in a Cascade of Small Earthen Dams: Case Study of the Čižina River in the Czech Republic
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...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-08-01
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| Series: | Water |
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| Online Access: | https://www.mdpi.com/2073-4441/12/8/2309 |
| _version_ | 1797557430694969344 |
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| author | Jaromír Říha Stanislav Kotaška Lubomír Petrula |
| author_facet | Jaromír Říha Stanislav Kotaška Lubomír Petrula |
| author_sort | Jaromír Říha |
| collection | DOAJ |
| description | 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 Pocheň (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%. |
| first_indexed | 2024-03-10T17:17:59Z |
| format | Article |
| id | doaj.art-1d30a81d415c4a5d81f7d3ec193939c6 |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-10T17:17:59Z |
| publishDate | 2020-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Water |
| spelling | doaj.art-1d30a81d415c4a5d81f7d3ec193939c62023-11-20T10:26:38ZengMDPI AGWater2073-44412020-08-01128230910.3390/w12082309Dam Break Modeling in a Cascade of Small Earthen Dams: Case Study of the Čižina River in the Czech RepublicJaromír Říha0Stanislav Kotaška1Lubomír Petrula2Faculty of Civil Engineering, Institute of Water Structures, Brno University of Technology, Veveří 331/95, 602 00 Brno, Czech RepublicFaculty of Civil Engineering, Institute of Water Structures, Brno University of Technology, Veveří 331/95, 602 00 Brno, Czech RepublicFaculty of Civil Engineering, Institute of Water Structures, Brno University of Technology, Veveří 331/95, 602 00 Brno, Czech RepublicFailures 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 Pocheň (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%.https://www.mdpi.com/2073-4441/12/8/2309dam breakdam overtoppinginternal erosioncascade of damserodibility |
| spellingShingle | Jaromír Říha Stanislav Kotaška Lubomír Petrula Dam Break Modeling in a Cascade of Small Earthen Dams: Case Study of the Čižina River in the Czech Republic Water dam break dam overtopping internal erosion cascade of dams erodibility |
| title | Dam Break Modeling in a Cascade of Small Earthen Dams: Case Study of the Čižina River in the Czech Republic |
| title_full | Dam Break Modeling in a Cascade of Small Earthen Dams: Case Study of the Čižina River in the Czech Republic |
| title_fullStr | Dam Break Modeling in a Cascade of Small Earthen Dams: Case Study of the Čižina River in the Czech Republic |
| title_full_unstemmed | Dam Break Modeling in a Cascade of Small Earthen Dams: Case Study of the Čižina River in the Czech Republic |
| title_short | Dam Break Modeling in a Cascade of Small Earthen Dams: Case Study of the Čižina River in the Czech Republic |
| title_sort | dam break modeling in a cascade of small earthen dams case study of the cizina river in the czech republic |
| topic | dam break dam overtopping internal erosion cascade of dams erodibility |
| url | https://www.mdpi.com/2073-4441/12/8/2309 |
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