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Article

Modified Convergent Flow Tracing Method for Evaluating Advective Velocity and Effective Porosity in Fractured Rock Aquifers

by 1 and 2,*
1
K-water Research Institute, Korea Water Resources Corporation, Daejeon 34045, Korea
2
Center for Deep Subsurface Research, Korea Institute of Geoscience and Mineral Resources, Daejeon 34132, Korea
*
Author to whom correspondence should be addressed.
Water 2020, 12(12), 3565; https://doi.org/10.3390/w12123565
Received: 11 November 2020 / Revised: 12 December 2020 / Accepted: 15 December 2020 / Published: 18 December 2020
This study presented the analysis of the modified convergent flow tracing method, which is a modified virtual solute transport approach to retrieve tracer masses from a pulse image (virtual) well to an extraction well. In the convergent flow tracer test, approximate analytical solutions were extended for the pulse image well using a single-well tracing method. This method transformed the drift-and-pumpback conditions of the single-well tracing method. The method requires a prior information of the effective porosity. Using sodium chloride as a tracer mass, the tracer data sampled through field-scale tests were used to obtain breakthrough curves. This modified method was different from the pre-existing single method because it considers both the ambient groundwater movement (the two classes of drifts) and the constant volumetric flow rate during the pumping phase. The method was applied to the tracer test at underground research tunnel for verifying the theory inductively derived from the single tracing method. Through field tests, the values of velocity and porosity were compared to the results of the drift-and-pumpback equations of the single-well test, and the several different equations related to breakthrough curves of the two-well tests conducted on a field scale. View Full-Text
Keywords: modified convergent flow tracing method; solute transport; convergent flow tracer test; effective porosity; drift-and-pumpback equations modified convergent flow tracing method; solute transport; convergent flow tracer test; effective porosity; drift-and-pumpback equations
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MDPI and ACS Style

Kim, B.-W.; Lee, H. Modified Convergent Flow Tracing Method for Evaluating Advective Velocity and Effective Porosity in Fractured Rock Aquifers. Water 2020, 12, 3565. https://doi.org/10.3390/w12123565

AMA Style

Kim B-W, Lee H. Modified Convergent Flow Tracing Method for Evaluating Advective Velocity and Effective Porosity in Fractured Rock Aquifers. Water. 2020; 12(12):3565. https://doi.org/10.3390/w12123565

Chicago/Turabian Style

Kim, Byung-Woo, and Hangbok Lee. 2020. "Modified Convergent Flow Tracing Method for Evaluating Advective Velocity and Effective Porosity in Fractured Rock Aquifers" Water 12, no. 12: 3565. https://doi.org/10.3390/w12123565

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