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The impact of diurnal surface water fluctuations on groundwater diffusion: assessment through Fick’s second law

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Abstract

This article reports the interaction between groundwater and surface water sources based on diurnal head fluctuations. The model uses the well-known Fick’s second law to numerically estimate the pressure head variations in heterogeneous aquifers. The developed numerical model can examine the effects of both stream level sudden diurnal and gradual variations on the pressure heads in a confined heterogeneous aquifer. Calculations of pressure heads as a result of the interaction indicated that independent of the sequence of diffusion coefficient in the two similar confined aquifers, variations in pressure head will be the same at considerable amount of distances from the interaction region, unless when the total effective diffusion lengths are different. In the investigated cases, through time, the significant difference in the pressure heads between the gradual and sudden increase in stream water levels vanished, and the pressure head variations between the two cases became negligible.

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The applications developed and used during the study are available from the corresponding author by request.

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Acknowledgments

Author would like to thank Professor Hubert J. Morel-Seytoux for his valuable comments and suggestions on an earlier version of this article and Professor Mehdi Riazi for his careful reading and editing recommendations that has improved the text of the article.

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Contributions

Amin Riazi and Gholam Reza Rakhshandehroo developed the initial idea; Amin Riazi and Umut Türker contributed significantly to analysis and manuscript preparation. All authors were involved in developing the related applications and writing, reviewing, and editing the article.

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Correspondence to Amin Riazi.

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The authors declare no competing interests.

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Responsible Editor: Xianliang Yi

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Riazi, A., Türker, U. & Rakhshandehroo, G.R. The impact of diurnal surface water fluctuations on groundwater diffusion: assessment through Fick’s second law. Environ Sci Pollut Res 28, 32321–32329 (2021). https://doi.org/10.1007/s11356-021-13064-9

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  • DOI: https://doi.org/10.1007/s11356-021-13064-9

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