Comments on failures of small dams in the Czech Republic during historical flood events
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Published:2004
J. Riha, 2004. "Comments on failures of small dams in the Czech Republic during historical flood events", Long-term benefits and performance of dams: Proceedings of the 13th Conference of the British Dam Society and the ICOLD European Club meeting held at the University of Kent, Canterbury, UK from 22 to 26 June 2004., Henry Hewlett
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During the catastrophic floods, namely those in July 1997 and August 2002 and also during local flood events, which occur almost every year in the Czech Republic, more than 100 failures of small dams were identified during last decade. After careful analysis of typical small dam failures, the reasons for dam collapses were found and assessed. During the flood events the most frequent failure of small dams was by breaching due to dam overtopping. The majority of small dam spillways suffer from insufficient capacity, inconvenient structure and arrangement. At some places spillways were blocked by broken gates, clogged jammed racks or floating debris. Moreover, in some cases the bottom outlets were not maintained and out of order. In the paper, several examples of unsuitable spillways and other dam appurtenances are shown.
Introduction
Basic Data
Analysis of the Failures of the Small Dams
Conclusions
References
