Publication result detail

Reconstruction of the Znojmo Dam - practical application of hydraulic research

STARA, V.; ŠPANO, M.; ŠULC, J.

Original Title

Reconstruction of the Znojmo Dam - practical application of hydraulic research

English Title

Reconstruction of the Znojmo Dam - practical application of hydraulic research

Type

Paper in proceedings (conference paper)

Original Abstract

Many dams and waterworks had been built in Czech Republic during 1950s and 1960s. The one of them is the Znojmo Dam. It is an earth dam with combined spillway block. The nominal discharge of Q = 355 m3.s-1 was considered to design of the safety spillway. Extreme flood events occurred in Czech Republic in 1997 and 2002 evoked questions relating to the safety of dams. The nominal discharge of the Znojmo Dam safety spillway was enhanced up to Q = 610 m3.s-1. Therefore, the decision of reconstruction of the Znojmo dam spillway block was made. The following modifications were proposed: to sink the existing spillway crest, to replace the existing flap gates with tainter gates with flaps, installation of breakwater on the dam crest, and necessary modifications of the stilling basin. With regard to the importance of the dam and the volume of the planned reconstruction, assessment on a hydraulic model was necessary. This paper summarizes the results of the hydraulic research and its practical application on the processing reconstruction of the Znojmo Dam. It also describes some differences between the modeled situations and reality.

English abstract

Many dams and waterworks had been built in Czech Republic during 1950s and 1960s. The one of them is the Znojmo Dam. It is an earth dam with combined spillway block. The nominal discharge of Q = 355 m3.s-1 was considered to design of the safety spillway. Extreme flood events occurred in Czech Republic in 1997 and 2002 evoked questions relating to the safety of dams. The nominal discharge of the Znojmo Dam safety spillway was enhanced up to Q = 610 m3.s-1. Therefore, the decision of reconstruction of the Znojmo dam spillway block was made. The following modifications were proposed: to sink the existing spillway crest, to replace the existing flap gates with tainter gates with flaps, installation of breakwater on the dam crest, and necessary modifications of the stilling basin. With regard to the importance of the dam and the volume of the planned reconstruction, assessment on a hydraulic model was necessary. This paper summarizes the results of the hydraulic research and its practical application on the processing reconstruction of the Znojmo Dam. It also describes some differences between the modeled situations and reality.

Keywords

safety of dams, Znojmo Dam, safety spillway, reconstruction

Key words in English

safety of dams, Znojmo Dam, safety spillway, reconstruction

Authors

STARA, V.; ŠPANO, M.; ŠULC, J.

Released

06.09.2006

Publisher

Thomas Telford Limited

Location

Durham

ISBN

0727734709

Book

Imrovements in reservoir construction, operation and maintenance

Pages from

106

Pages to

115

Pages count

10

BibTex

@inproceedings{BUT22116,
  author="Vlastimil {Stara} and Miroslav {Špano} and Jan {Šulc}",
  title="Reconstruction of the Znojmo Dam - practical application of hydraulic research",
  booktitle="Imrovements in reservoir construction, operation and maintenance",
  year="2006",
  number="1",
  pages="106--115",
  publisher="Thomas Telford Limited",
  address="Durham",
  isbn="0727734709"
}