Articles | Volume 27, issue 3
https://doi.org/10.5194/hess-27-783-2023
https://doi.org/10.5194/hess-27-783-2023
Research article
 | 
15 Feb 2023
Research article |  | 15 Feb 2023

Effects of dynamic changes of desiccation cracks on preferential flow: experimental investigation and numerical modeling

Yi Luo, Jiaming Zhang, Zhi Zhou, Juan P. Aguilar-Lopez, Roberto Greco, and Thom Bogaard

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Cited articles

Aguilar-López, J. P., Bogaard, T. A., and Gerke, H. H.: Dual-Permeability Model Improvements for Representation of Preferential Flow in Fractured Clays, Water Resour. Res., 56, e2020WR027304, https://doi.org/10.1029/2020wr027304, 2020. 
Arora, B., Mohanty, B. P., and McGuire, J. T.: Inverse estimation of parameters for multidomain flow models in soil columns with different macropore densities, Water Resour. Res., 47, W04512, https://doi.org/10.1029/2010WR009451, 2011. 
Baram, S., Kurtzman, D., and Dahan, O.: Water percolation through a clayey vadose zone, J. Hydrol., 424–425, 165–171, https://doi.org/10.1016/j.jhydrol.2011.12.040, 2012. 
Baram, S., Ronen, Z., Kurtzman, D., Külls, C., and Dahan, O.: Desiccation-crack-induced salinization in deep clay sediment, Hydrol. Earth Syst. Sci., 17, 1533–1545, https://doi.org/10.5194/hess-17-1533-2013, 2013. 
Bauerle, T. L., Richards, J. H., Smart, D. R., and Eissenstat, D. M.: Importance of internal hydraulic redistribution for prolonging the lifespan of roots in dry soil, Plant Cell Environ., 31, 177–186, https://doi.org/10.1111/j.1365-3040.2007.01749.x, 2008. 
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This paper describes an experiment and modeling of the hydrological response of desiccation cracks under long-term wetting–drying cycles. We developed a new dynamic dual-permeability model to quantify the dynamic evolution of desiccation cracks and associated preferential flow and moisture distribution. Compared to other models, the dynamic dual-permeability model could describe the experimental data much better, but it also provided an improved description of the underlying physics.