Flood-control reconstruction of Lázbérc

Projet terminé

During the very intense precipitations of May 2010, important structural elements of the Lázbérc reservoir were damaged due to the high run-off. The project renews and rehabilitates the damaged parts of the dam, such as the spillway, surface and underground drainage systems and the downstream canal. Thanks to this, 2’650 inhabitants of down-stream settlements are less threatened by a dam failure.

Pays/région Thème Période Budget
Hongrie
Accroître la sécurité publique
Prévention des catastrophes naturelles et des situations d‘urgence
01.03.2013 - 20.03.2017
CHF 1'009'370

Note: the texts under all the headings, with the exception of 'Results achieved', describe the situation before the start of the project.

Contexte The primary function of the Reservoir of Lázbérc is the drinking-water supply, but in addition it is supposed to fulfill a certain role to reduce flood level. The reservoir contains a storage volume of 6.2 million m3. However, during the heavy floods in May 2010, a total of 19 million m3 were discharged through the dam’s spillway in only two weeks’ time. Even if flood protection is only a secondary use of the reservoir, flood peaks might be reduced thanks to the reservoir. The extreme flooding in 2010 resulted in severe damages of the dam’s structure. The concrete structure of the spillway is in need of repair, seepage draining adjacent to the spillway has to be improved and the downstream canal / creek got severely eroded.

Objectifs

The overall goal is to increase the flood safety of three settlements below the reservoir of Lázbérc. For this purpose, damages at the dam structure are repaired in order to reduce the danger of inundation respectively of a dam failure with a flood wave.

Groupes cibles

2'650 inhabitants in three downstream settlements with 300 ha of land; 100’000 inhabitants spread over 25 settlements in the Kazincbarcika micro-region who rely on drinking water supply from the reservoir; municipal, provincial and government authorities

Activités

The damages at the dam of the Lázbérc reservoir are repaired with the renewal of various concrete sections of the spillway structure in order to prevent further deterioration and ultimately collapse thereof. Furthermore, the surface and underground-drainage on the right-hand slope (adjacent to the spillway) is rehabilitated and the downstream flood release canal is renewed to avoid erosion at the foot of the dam.

Résultats

Résultats obtenus:  

  • Reconstruction of the complete concrete surface of the spillway structure in a 3,706 m2 large area (and reconstruction of drainage system as an underground construction in a length of 51 linear meters, and diversion channel covered in a length of 105 linear meters
  • 3 settlements (2.644 people) and 300 ha large area are protected against flooding and groundwater damages


Direction/office fédéral responsable DDC
Crédit Contribution suisse à l'UE élargie
Partenaire de projet Partenaire contractuel
Institution étatique étrangère
  • National State Institute North


Budget Phase en cours Budget de la Suisse CHF   1'009'370 Budget suisse déjà attribué CHF   981'569
Phases du projet

Phase 1 01.03.2013 - 20.03.2017   (Completed)