Laboratory and Numerical Study of the Hydraulic Barriers on Contaminant Transport

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Sirous Rezaei A. A.; AHMADI H.

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Journal: Iranian Journal of Irrigation and Drainage Year:2020 | Volume:14 | Issue:1 Page(s): 49-60

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Title

Laboratory and Numerical Study of the Hydraulic Barriers on Contaminant Transport

Author(s)

Sirous Rezaei A. A. | AHMADI H. | Issue Writer Certificate

Keywords

Clay layerQ2

ContaminantQ1

CTRAN/WQ1

EnvironmentQ1

Hydraulic BarriersQ2

Sand layerQ2

SEEP/WQ2

Abstract

In this study, Contaminant transport from surface pollutant source to groundwater source through a hydraulic system consisting of three layers of soil is considered by using laboratory models and a numerical model. Three soil layers including two fine-grained layers and one coarse-grained layer were considered between them. Arrangement from top to bottom of the studied model consisted of a contamination tank containing sodium chloride solution as a source of Contaminant, a Clay layer with a physical barrier, a Sand layer with a hydraulic barrier and a bottom placed Clay layer as natural land and ultimately a fresh water tank as the groundwater source, receiving contamination. To study the performance of the hydraulic barrier, the physical and hydraulic properties of the used materials were calibrated in the CTRAN / W model. Then the calibrated model was validated using observed data with the extra conducted testes. Finally, hydraulic barrier performance at different hydraulic gradients and pressures was evaluated by numerical model. The results showed that the performance of hydraulic barrier is in the best condition in case of no hydraulic gradient in the upper Clay layer. The achieved data revealed the hydraulic barrier efficiency is almost seventy percent better than the regular compacted liners without a hydraulic barrier. The studies also showed that the transmission of Contaminant to the receiving reservoir under positive gradient (downstream flow in the Clay layer) was more in comparison to the negative gradient (upstream flow in the Clay layer).

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APA: Copy

Sirous Rezaei, A. A., & AHMADI, H.. (2020). Laboratory and Numerical Study of the Hydraulic Barriers on Contaminant Transport. IRANIAN JOURNAL OF IRRIGATION AND DRAINAGE, 14(1 ), 49-60. SID. https://sid.ir/paper/378972/en

Vancouver: Copy

Sirous Rezaei A. A., AHMADI H.. Laboratory and Numerical Study of the Hydraulic Barriers on Contaminant Transport. IRANIAN JOURNAL OF IRRIGATION AND DRAINAGE[Internet]. 2020;14(1 ):49-60. Available from: https://sid.ir/paper/378972/en

IEEE: Copy

A. A. Sirous Rezaei, and H. AHMADI, “Laboratory and Numerical Study of the Hydraulic Barriers on Contaminant Transport,” IRANIAN JOURNAL OF IRRIGATION AND DRAINAGE, vol. 14, no. 1 , pp. 49–60, 2020, [Online]. Available: https://sid.ir/paper/378972/en

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