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https://doi.org/10.5194/nhess-2021-199
https://doi.org/10.5194/nhess-2021-199
09 Jul 2021
 | 09 Jul 2021
Status: this preprint has been withdrawn by the authors.

The catastrophe of the Niedów dam – the causes of the dam's breach, its development and consequences

Stanisław Kostecki and Robert Banasiak

Abstract. Due to extreme rainfall in 2010 in the Lusatian Neisse River catchment area, a flood event with a return period of over 100 years occurred, leading to the failure of the Niedów dam. The earth-type dam was washed away, resulting in the rapid release of nearly 8.5 million m3 of water and the flooding of the downstream area with substantial material losses. The paper analyses the conditions and causes of the dam’s failure, with special attention given to the mechanism and dynamics of the compound breaching process, in which the dam’s upstreeam slope reinforcement played a remarkable role. The paper also describes a numerical approach for simulating a combined flood event along the Lusatian Neisse River with the use of a two-dimensional hydrodynamic model (MIKE21). The flood event occurred downstream from the dam. Considering the specific local conditions and available data set, an iterative solution of the unsteady state problem is proposed. This approach enables realistic flood propagation estimates to be delivered, the dam breach outflow to be reconstructed, and several important answers concerning the consequences of the dam’s failure to be provided.

This preprint has been withdrawn.

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Stanisław Kostecki and Robert Banasiak

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on nhess-2021-199', Anonymous Referee #1, 03 Aug 2021
  • RC2: 'Comment on nhess-2021-199', Anonymous Referee #2, 05 Aug 2021

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on nhess-2021-199', Anonymous Referee #1, 03 Aug 2021
  • RC2: 'Comment on nhess-2021-199', Anonymous Referee #2, 05 Aug 2021
Stanisław Kostecki and Robert Banasiak
Stanisław Kostecki and Robert Banasiak

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Short summary
The paper analyses and explains the conditions and causes of the Niedów dam’s failure in 2010, with special attention given to the mechanism and dynamics of the compound breaching process, in which the dam’s reinforcement played a remarkable role. The paper also describes a two-dimensional hydrodynamic model for simulating the flood event along the Lusatian Neisse River, including the determination of the dam’s peak outflow.
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