Dam failures of embankment dams caused by overtopping or accidental leakage – New aspects for breach widening and deepening processes

2015 ◽  
pp. 81-94 ◽  
Keyword(s):  
Embankment Dams ◽  
Dam Failures

scholarly journals Electromagnetic profiling of Owena Dam, Southwestern Nigeria, using very-low-frequency radio fields

2016 ◽  
Vol 63 (4) ◽  
pp. 237-250 ◽  
Author(s):  
Cyril Okpoli ◽  
Raphael Tijani
Keyword(s):  
Low Frequency ◽  
Soil Mass ◽  
Internal Erosion ◽  
Dam Failure ◽  
Real Component ◽  
Southwestern Nigeria ◽  
Very Low Frequency ◽  
Embankment Dams ◽  
Fractured Zones ◽  
Basement Structures

AbstractVery low frequency (VLF) was used to assess variations in overburden composition, bedrock lithology and the concealed basement structures within the bedrock of Owena Dam in Igbara-Oke of the Precambrian Basement Complex of Southwestern Nigeria. Five VLF-electromagnetic (EM) traverses were occupied at 5 m intervals. The VLF normal and filtered real component anomalies identify major geological interfaces suspected to be faults/fractured zones. The points of crossover between the real and imaginary components delineate the fractured zones, which were identified as areas of possible seepage (piping and sloughing). The internal erosion (permeability) of soil mass eventually leads to the formation of an open conduit in the soil, which may lead to failure of the embankment/dam. The fractured zones are suspected to be present at all traverses. In total, 21 fractured zones were identified along the dam embankment, with the deepest occurrence at Traverse 5. These seepage zones cause heterogeneity in the subsurface composition, which could lead to dam failure. The result of the study suggests that VLF is an adequate method of monitoring seepages in embankment dams.

Simulation of Dam Failures in Multidike Reservoirs Arranged in Cascade

1997 ◽  
Vol 123 (11) ◽  
pp. 950-961 ◽  
Author(s):  
C. Marche ◽  
J. Gagnon ◽  
T.-T. Quach ◽  
R. Kahawita ◽  
P. Beauchemin
Keyword(s):  
Dam Failures

scholarly journals Modular assessment of the performance of embankment dams

2016 ◽  
Vol 22 (3) ◽  
pp. 315-337 ◽  
Author(s):  
Gisèle Bambara ◽  
Corinne Curt ◽  
Patrice Mériaux ◽  
Michel Vennetier ◽  
Pierre Vanloot
Keyword(s):  
Embankment Dams

Radar techniques for indicating internal erosion in embankment dams

1995 ◽  
Vol 33 (1-3) ◽  
pp. 143-156 ◽  
Author(s):  
Seje Carlsten ◽  
Sam Johansson ◽  
Anders Wörman
Keyword(s):  
Internal Erosion ◽  
Embankment Dams
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