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Headword erosion in embankment dams caused by spillway flood discharge
Vattenfall R and D, Royal Institute of Technology (KTH).
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.
2012 (English)In: International journal on hydropower and dams, ISSN 1352-2523, Vol. 19, no 6, p. 68-72Article in journal (Refereed) Published
Abstract [en]

An embankment dam with conventional stability requirements should be able to withstand so- called design seepage flow, which is often turbulent. To meet this requirement, many dams in the country have been reinforced with stabilizing measures. Another type of instability issue for embankment dams is headward erosion, which is less common and subsequently receives less attention in the design. The bedrock elevation downstream of the energy dissipator and in its immediate vicinity is another important factor in erosion studies, and should be identified in advance. The bedrock elevation determines how deep the erosion down-cut will develop. Hydraulic model tests prove to be an easy means of evaluating issues of this type. All the models are based on Froude scaling laws without vertical scale distortion. Based on the prototype data, sand and gravel of appropriate sizes are chosen as erodible material.

Place, publisher, year, edition, pages
2012. Vol. 19, no 6, p. 68-72
National Category
Fluid Mechanics and Acoustics
Research subject
Fluid Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-6344Local ID: 4932d18b-c8dd-4379-baa6-1790f63cbe69OAI: oai:DiVA.org:ltu-6344DiVA, id: diva2:979221
Note
Validerad; 2013; 20130114 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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Andreasson, Patrik

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