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Coping with extreme floods through dam refurbishment – a Swedish practice
Vattenfall R&D.
Vattenfall AB.
2006 (English)Conference paper (Refereed)
Abstract [en]

With the current guidelines of design floods, studies have shown that many high-hazard dams in Sweden have a higher design flood than constructed for. An extensive dam-safety program is currently going on to adapt the dams to the guidelines. The paper illustrates a number of dams undergoing refurbishment to withstand extreme flood events. Alternative engineering measures are mainly (1) modification of the existing spillway to increase its discharge capacity; (2) increase of the spillway capacity by allowing the water to rise above the legal retention level , (which usually creates a need to reinforce the dam); and (3) mitigation of the flood magnitude by temporary storage of flood water in large reservoirs of a river basin. For the safe discharge of the new design flood, there is a need to check such aspects of a dam as leakage potential, risk for inner erosion, dam slope stability, energy dissipation, risk for erosion in the waterways, etc.

Place, publisher, year, edition, pages
Keyword [en]
Floods, dam refurbishment, design flood
National Category
Civil Engineering
URN: urn:nbn:se:kth:diva-179791OAI: diva2:889456
22nd ICOLD Congress, June 2006, Barcelona, Spain

QC 20160107

Available from: 2015-12-25 Created: 2015-12-25 Last updated: 2016-01-07Bibliographically approved

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Yang, James
Civil Engineering

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