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Research Papers

Seepage Monitoring of an Embankment Dam Based on Hydro-Thermal Coupled Analysis

[+] Author and Article Information
Chung R. Song

Civil Engineering Department,
University of Nebraska-Lincoln,
Lincoln, NE 68583
e-mail: csong8@unl.edu

Tewodros Y. Yosef

Civil Engineering Department,
University of Nebraska-Lincoln,
Lincoln, NE 68583
e-mail: tyyosef@huskers.unl.edu

1Corresponding author.

Contributed by the Materials Division of ASME for publication in the JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY. Manuscript received May 31, 2016; final manuscript received February 16, 2017; published online March 2, 2017. Assoc. Editor: Taehyo Park.

J. Eng. Mater. Technol 139(2), 021024 (Mar 02, 2017) (9 pages) Paper No: MATS-16-1160; doi: 10.1115/1.4036020 History: Received May 31, 2016; Revised February 16, 2017

Distributed temperature sensing (DTS)-based fiber optic sensors are widely used for monitoring spatially continuous temperature distribution in structures. In this research, hydro-thermal (H-T) coupled analysis is used to monitor seepage conditions in an embankment dam. Variably saturated two-dimensional heat transport (VS2DHI), a computer code developed by the U.S. Geological Survey, was used for this coupled analysis. From the coupled analysis, the temperature profile for a dam with an artificially generated crack clearly showed the location of the crack. In addition, it turned out that the temperature change in the dam took much longer than the seepage time due to the additional time required for heat transfer. The study shows that temperature variation in the dam is comparable to the seepage condition with time delay for heat transfer. This study also shows the possibility that temperature data may serve as a tool to diagnose prior seepage conditions and past incidents of a dam.

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Figures

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Fig. 1

Geometry of the dam

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Fig. 2

Seasonal reservoir water temperature fluctuation

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Fig. 3

Seasonal ambient air temperature fluctuation

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Fig. 4

Contour of degree of saturation in the dam during initial time of simulation with (right side) and without (left side) the presence of artificial crack in the core

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Fig. 5

Contour of degree of saturation in the dam during middle and end of simulation period with (right side) and without (left side) the presence of artificial crack in the core

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Fig. 6

Contour of temperature distribution in the dam during initial time of simulation with (right side) and without (left side) the presence of artificial crack in the core

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Fig. 7

Contour of temperature distribution in the dam during middle and end of simulation period with (right side) and without (left side) the presence of artificial crack in the core

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Fig. 8

Temperature time series near the core with/without the presence of leakage

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Fig. 9

Temperature profile along the center core wall while leaking

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