Influence of Geotechnical Properties on Landslide Dam Failure Due to Internal Erosion and Piping

2014 ◽  
pp. 623-631 ◽  
Author(s):  
Austin Chukwueloka Okeke ◽  
Fawu Wang ◽  
Yasuhiro Mitani
Keyword(s):  
Landslide Dam ◽  
Geotechnical Properties ◽  
Internal Erosion ◽  
Dam Failure

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.

scholarly journals Geotechnical Properties of Yunokura Landslide Dam Induced by 2008 Iwate-Miyagi Nairiku Earthquake

2011 ◽  
Vol 11 (5) ◽  
pp. 80-93
Author(s):  
Ryosuke UZUOKA ◽  
Noriaki SENTO ◽  
Tomohiro MORI ◽  
Motoki KAZAMA
Keyword(s):  
Landslide Dam ◽  
Geotechnical Properties

AN INTEGRATED APPROACH TO PREDICT OUTFLOW HYDROGRAPH DUE TO LANDSLIDE DAM FAILURE BY OVERTOPPING AND SLIDING

2008 ◽  
Vol 52 ◽  
pp. 151-156 ◽  
Author(s):  
Ripendra AWAL ◽  
Hajime NAKAGAWA ◽  
Kenji KAWAIKE ◽  
Yasuyuki BABA ◽  
Hao ZHANG
Keyword(s):  
Landslide Dam ◽  
Integrated Approach ◽  
Dam Failure ◽  
Outflow Hydrograph

Landslide Dam Failure Analysis Using Imaging and Ranging Sensors

2021 ◽  
pp. 3-17
Author(s):  
Keivan Tavakoli ◽  
Ehsan Zadehali ◽  
Arsalan Malekian ◽  
Sara Darsi ◽  
Laura Longoni ◽  
...  
Keyword(s):  
Failure Analysis ◽  
Landslide Dam ◽  
Dam Failure

scholarly journals Dynamic decision making for dam-break emergency management – Part 2: Application to Tangjiashan landslide dam failure

2013 ◽  
Vol 13 (2) ◽  
pp. 439-454 ◽  
Author(s):  
M. Peng ◽  
L. M. Zhang
Keyword(s):  
Decision Making ◽  
At Risk ◽  
Emergency Management ◽  
Landslide Dam ◽  
Dam Break ◽  
Flood Routing ◽  
Dynamic Decision Making ◽  
Dam Failure ◽  
Population At Risk ◽  
Three Stages

Abstract. Tangjiashan landslide dam, which was triggered by the Ms = 8.0 Wenchuan earthquake in 2008 in China, threatened 1.2 million people downstream of the dam. All people in Beichuan Town 3.5 km downstream of the dam and 197 thousand people in Mianyang City 85 km downstream of the dam were evacuated 10 days before the breaching of the dam. Making such an important decision under uncertainty was difficult. This paper applied a dynamic decision-making framework for dam-break emergency management (DYDEM) to help rational decision in the emergency management of the Tangjiashan landslide dam. Three stages are identified with different levels of hydrological, geological and social-economic information along the timeline of the landslide dam failure event. The probability of dam failure is taken as a time series. The dam breaching parameters are predicted with a set of empirical models in stage 1 when no soil property information is known, and a physical model in stages 2 and 3 when knowledge of soil properties has been obtained. The flood routing downstream of the dam in these three stages is analyzed to evaluate the population at risk (PAR). The flood consequences, including evacuation costs, flood damage and monetized loss of life, are evaluated as functions of warning time using a human risk analysis model based on Bayesian networks. Finally, dynamic decision analysis is conducted to find the optimal time to evacuate the population at risk with minimum total loss in each of these three stages.

Landslide dam failure and flood hydraulics. Part II: coupled mathematical modelling

2011 ◽  
Vol 59 (2) ◽  
pp. 1021-1045 ◽  
Author(s):  
Zhixian Cao ◽  
Zhiyuan Yue ◽  
Gareth Pender
Keyword(s):  
Mathematical Modelling ◽  
Landslide Dam ◽  
Dam Failure

Rupture du barrage du lac Beloeil: causes et conséquences

1995 ◽  
Vol 22 (3) ◽  
pp. 506-513 ◽  
Author(s):  
Bruno Robert ◽  
Jean-Jacques Paré
Keyword(s):  
Human Life ◽  
Internal Erosion ◽  
Earth Dam ◽  
Dam Failure ◽  
Surveillance Program ◽  
Dam Foundation ◽  
Environmental Consequences ◽  
Small Water ◽  
History Of ◽  
Foundation Failure

The foundation failure of a small earth dam, 4.1 m in height, has created a large breach through the overburden foundation, down to the bedrock, and has produced the complete loss of the Beloeil Lake reservoir. The geological nature of the dam foundation was complex; its resistance to internal erosion has changed with time due to seepage forces. The design of the dam foundation treatment was marginal. In this paper, the conditions of the dam prior to failure are given, the probable causes of the accident are presented, and the environmental consequences are reported. Such a case history of a dam failure illustrates the necessity to have a thorough knowledge of the foundation conditions of existing dams even for a very small water retaining structure. That accident demonstrates also the need for a continuous and effective surveillance program. Damages consist mainly in overburden erosion and sediment transportation through a remote area without any loss of human life. Key words: earth dam, foundation, failure, environment, rehabilitation, dam safety, surveillance.

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