Sequential Drawdown and Rainwater Infiltration Based Stability Assessment of Earthen Dams

Talukdar, Priyanka; Dey, Arindam

doi:10.1007/978-981-15-0890-5_45

Cited by 2 publications

(2 citation statements)

References 4 publications

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“…These older dams were more prone to exhibiting inhomogeneous zones. When water levels in a dam increase owing to rainfall, seepage water accumulates in the path of least resistance in the uneven fill zone, indicating potential susceptibility to failure under such conditions [11][12][13]. From 2010 to 2020, failures in 104 reservoirs in 2020, failures in 104 reservoirs in Korea occurred most frequently during the monsoon period between July and October and were mainly attributed to aging and heavy rainfall.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Seepage Analysis of Gabion Retaining Wall Structure for Preventing Overtopping in Reservoir Dams

Lee,

Han,

Kim

et al. 2024

Applied Sciences

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Recently, heavy rains caused by climate change have resulted in dam failures due to overtopping. This study presents a design method aiming to prevent overtopping failures by applying gabion retaining walls at the dam crest. Simulations, experiments, and measurements were conducted to evaluate the effectiveness of this design. The design framework aims to establish a system in which gabion retaining walls prevent overtopping when water levels exceed the crest of the dam, efficiently draining seepage water into the dam body through vertical filters. Research findings indicate that implementing dam crest core and geomembrane design effectively prevents seepage and saturation of the downstream slope during overtopping events. Notably, the reservoir dam operates in a stable manner, as seepage water passing through the dam body is directed solely to the toe drain. Overall, this design approach suggests its potential as a practical solution by significantly reducing hazards resulting from heavy rainfall.

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Section: Introductionmentioning

confidence: 99%

Experimental and Seepage Analysis of Gabion Retaining Wall Structure for Preventing Overtopping in Reservoir Dams

Lee,

Han,

Kim

et al. 2024

Applied Sciences

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“…The calculations of authors [5][6][7][8][9][10] showed that the slope Safety Factor decreasing during the intense water level falling under the steady state seepage condition at the initial time, and if the water level was getting higher the Safety Factor increased in the water reservoir [11]. Decrease in slope stability is noted also under the transient seepage conditions as water penetrates into unsaturated soil during the rain that leads to increase of the phreatic surface [7,12,13]. In the article [14] is noted that Safety Factor of the clay slope during the rapid rising and falling (transient condition) decreases less than the Safety Factor calculated during the water falling from steady high level in the water reservoir.…”

Section: Introductionmentioning

confidence: 99%

The dam slope stability under the transient condition during an extreme flood

Velychko

Dupliak

2021

E3S Web Conf.

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Mountain Flood Control Reservoir (MFC Reservoir) is used to reduce the flood level in the mountainous area and protect settlements downstream. The special feature of this MFC Reservoir is the fast filling during 1-2 days, short storage time at the maximum level and speed falling of the water level. Simulation of the MFC Reservoir operation was carried out on the software Midas GTS NX. Two rockfill dam models were developed: with the core and with the screen. The fluctuation of the water level in the MFC Reservoir was taken as the transformed flood from 1% to 10% probability. The fast water level change in the MCF Reservoir creates the transient seepage condition during the flood. During the water level rising in the MFC Reservoir, the upstream slope stability gradually increases because of hydrostatic pressure. After the water level begins to fall with rate of 0.7 m/hour, the slope stability decreases. The core or screen location significantly affects the stability of the upstream dam slope. The simulation showed that the upstream slope of the dam with the core was more stable. Due to the high hydraulic conductivity, the upstream dam prism with the berm significantly dampens the pore pressure in the dam and increases the stability of the upstream slope.

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Sequential Drawdown and Rainwater Infiltration Based Stability Assessment of Earthen Dams

Cited by 2 publications

References 4 publications

Experimental and Seepage Analysis of Gabion Retaining Wall Structure for Preventing Overtopping in Reservoir Dams

Experimental and Seepage Analysis of Gabion Retaining Wall Structure for Preventing Overtopping in Reservoir Dams

The dam slope stability under the transient condition during an extreme flood

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