Review of moraine core dams and internal erosion
2008 (English)In: Dam Engineering, ISSN 0958-9341, Vol. 19, no 2, 99-121 p.Article in journal (Refereed) Published
Embankment dams comprising broadly graded materials of glacial origin have in the past been identified as being prone to develop sinkholes more frequent than dams composed of materials of other origin. Sinkholes on the crest of a dam are many times an indicator of internal erosion. Internal erosion can initiate and continue to develop for many reasons, but mainly due to root causes coming from core/filter properties and interaction, possibly affected by the dam design and/or construction related reasons. In this paper a review is made on moraine core dams in the literature in relation to performance history of internal erosion. Dam data comprising 90 existing moraine core embankment dams has been compiled and assessed with objective to investigate the occurrence of indicative properties of dams that have developed internal erosion. The data set of dams consists predominately of Swedish dams, but it also includes moraine core dams located in the rest of Scandinavia, in North America, Russia and Australia. The investigation shows that a coarsely graded filter, grading instability of the core and filter, and high susceptibility for filter segregation are properties that are over-represented and possibly indicative for moraine (till) core dams with performance history of internal erosion.
Place, publisher, year, edition, pages
Kent UK: Global Trade Media , 2008. Vol. 19, no 2, 99-121 p.
Dams, internal erosion, moraine, till, filter, indicators
Mineral and Mine Engineering
IdentifiersURN: urn:nbn:se:kth:diva-14057OAI: oai:DiVA.org:kth-14057DiVA: diva2:329517
QC 201007122010-07-122010-07-122012-12-17Bibliographically approved