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Evaluating Spatial-Temporal Clogging Evolution in a Meso-Scale Lysimeter

Author

Listed:
  • Jui-Hsiang Lo

    (Department of Bioenvironmental Systems Engineering, National Taiwan University, Taipei 10617, Taiwan)

  • Qun-Zhan Huang

    (Department of Bioenvironmental Systems Engineering, National Taiwan University, Taipei 10617, Taiwan)

  • Shao-Yiu Hsu

    (Department of Bioenvironmental Systems Engineering, National Taiwan University, Taipei 10617, Taiwan)

  • Yi-Zhih Tsai

    (Department of Bioenvironmental Systems Engineering, National Taiwan University, Taipei 10617, Taiwan)

  • Hong-Yen Lin

    (Department of Bioenvironmental Systems Engineering, National Taiwan University, Taipei 10617, Taiwan)

Abstract

When surface water infiltrates soil, the fine soil particles carried in water gradually clog soil pores and form a low-permeability soil layer. Clogging impacts the variations in pore water pressure heads in soil and effective hydraulic conductivity. However, few studies have connected field measurements of pore water pressure heads to clogging in soil. This study proposed a diagram to demonstrate the relationship between the normalized pore water pressure head ( λ ) and effective hydraulic conductivity ( K e f f ) based on a conceptual 1-D vertical infiltration model. The coevolution of λ and K e f f indicated the occurrence of clogging and its location relative to the pore-pressure measurement point. We validated the λ - K e f f diagram based on a series of numerical simulations of infiltration experiments in a lysimeter. The simulation results showed that the proposed diagram not only indicated the occurrence of clogging but also the development of the unsaturated zone beneath the upper clogging layer. Furthermore, we used a diagram to analyze the spatiotemporal changes in permeability in a lysimeter during three cycles of physical infiltration experiments. The experimental data presented with λ - K e f f diagram indicated cracking on the soil surface, and clogging gradually developed at the bottom of the lysimeter.

Suggested Citation

  • Jui-Hsiang Lo & Qun-Zhan Huang & Shao-Yiu Hsu & Yi-Zhih Tsai & Hong-Yen Lin, 2022. "Evaluating Spatial-Temporal Clogging Evolution in a Meso-Scale Lysimeter," Land, MDPI, vol. 11(9), pages 1-16, September.
    • Handle: RePEc:gam:jlands:v:11:y:2022:i:9:p:1518-:d:910342
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    References listed on IDEAS

    as
    1. Ravindra Kale & Bhabagrahi Sahoo, 2011. "Green-Ampt Infiltration Models for Varied Field Conditions: A Revisit," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 25(14), pages 3505-3536, November.
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