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Eurokarst 2018, Besançon pp 151–158Cite as

Laboratory Experiments for Calibrating Flow Exchange Coefficient of MODFLOW CFP1

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Part of the book series: Advances in Karst Science ((AKS))

Abstract

A sandbox device was developed to test MODFLOW CFP1 under various conditions. The experiment represents a three-dimensional confined karst aquifer. MODFLOW CFP1 is a public-domain software developed by the US Geological Survey that is becoming popular for the simulation of karst hybrid models. Since geometry and hydraulic parameters of the matrix and conduit related to the experiments can be measured accurately, this study is focused on the flow exchange coefficient used by MODFLOW CFP1 to simulate the flow exchange between matrix and conduits of karst aquifers. The flow exchange coefficient is commonly calibrated given our limited knowledge of the underground system. In this work, we discuss the issues encountered during the calibration of this coefficient. It was found that the calibrated parameter values depend on the direction of the flow exchange something that is not considered in the current definition of this parameter. The calibration also revealed the structural inadequacy of the linear model used in MODFLOW CFP1 for simulating the flow exchange. These results are useful for further evaluation of MODFLOW CFP1 at laboratory and field scales.

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Acknowledgements

The first author was supported by the Fulbright Scholarship for his dissertation research at the Florida State University. The laboratory experiment was supported by a travel grant from the Hohai University. The second author was supported in part by National Science Foundation grant EAR-1828827.

Author information

Authors and Affiliations

  1. Sisal Academic Unit, Institute of Engineering, National Autonomous University of Mexico, Puerto de Abrigo Sisal, Yucatán, 97355, Mexico

    Roger B. Pacheco Castro

  2. Department of Earth, Ocean, and Atmospheric Science, Florida State University, Tallahassee, FL, 32306, USA

    Ming Ye

  3. College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing, China

    Xiaohu Tao, Hongyuan Wang & Jian Zhao

Authors
  1. Roger B. Pacheco Castro
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  2. Ming Ye
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  3. Xiaohu Tao
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  4. Hongyuan Wang
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  5. Jian Zhao
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Corresponding author

Correspondence to Roger B. Pacheco Castro .

Editor information

Editors and Affiliations

  1. Laboratoire Chrono-environnement, Université de Franche-Comté, Besançon, France

    Catherine Bertrand

  2. Laboratoire Chrono-environnement, Université de Franche-Comté, Besançon, France

    Sophie Denimal

  3. Laboratoire Chrono-environnement, Université de Franche-Comté, Besançon, France

    Marc Steinmann

  4. Centre d’Hydrogéologie, University of Neuchâtel, Neuchâtel, Switzerland

    Philippe Renard

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Pacheco Castro, R.B., Ye, M., Tao, X., Wang, H., Zhao, J. (2020). Laboratory Experiments for Calibrating Flow Exchange Coefficient of MODFLOW CFP1. In: Bertrand, C., Denimal, S., Steinmann, M., Renard, P. (eds) Eurokarst 2018, Besançon. Advances in Karst Science. Springer, Cham. https://doi.org/10.1007/978-3-030-14015-1_18

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