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Long-term behaviour of dams with internal erosion
KTH, School of Architecture and the Built Environment (ABE), Land and Water Resources Engineering (moved 20130630), Hydraulic Engineering (moved 20130630).
2009 (English)In: International Water Power and Dam Construction, ISSN 0306-400X, Vol. 61, no 7, 34-36 p.Article in journal (Refereed) Published
Abstract [en]

The performance history and long-term behavior of the dams mainly comprises of the internal erosion process of graded glacial soil associated with washout of fine grained particles from a dam's filling material by seepage. Internal erosion initiates generally by concentrated leak erosion, backward erosion, and/or suffusion. 30 existing dams comprising broadly graded soils of glacial origin that is, moraines and tills have been reviewed. These are all dams that have differing extents, and have experienced incidents of internal erosion. Incidents are most likely to occur early-on, since almost half of the dams reviewed experienced incidents during first filling or within the first year of service. The most common signs that precede an internal erosion related incident are increase in leakage, muddy leakage and pore-pressure variations in the dam body.

Place, publisher, year, edition, pages
2009. Vol. 61, no 7, 34-36 p.
Keyword [en]
Dam body, Filling materials, Fine-grained particles, First year, Glacial soils, Internal erosion, Long-term behavior, Pressure variations, Dams, Glacial geology, Soils, Leakage (fluid), dam construction, diffusion, erosion, leakage, pore pressure, rockfill dam, seepage
National Category
Other Civil Engineering
URN: urn:nbn:se:kth:diva-152796ScopusID: 2-s2.0-77949308226OAI: diva2:751501

QC 20141001

Available from: 2014-10-01 Created: 2014-10-01 Last updated: 2014-10-01Bibliographically approved

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Rönnqvist, Hans F.
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