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Estimation of Hydraulic Parameters from the Soil Water Characteristic Curve

Author

Listed:
  • Anastasia Angelaki

    (Laboratory of Agricultural Hydraulics, Department of Agriculture Crop Production & Rural Environment, University of Thessaly, Fytokou Street, N. Ionia, 38446 Vólos, Greece)

  • Vasiliki Bota

    (Laboratory of Agricultural Hydraulics, Department of Agriculture Crop Production & Rural Environment, University of Thessaly, Fytokou Street, N. Ionia, 38446 Vólos, Greece)

  • Iraklis Chalkidis

    (Laboratory of Agricultural Hydraulics, Department of Agriculture Crop Production & Rural Environment, University of Thessaly, Fytokou Street, N. Ionia, 38446 Vólos, Greece)

Abstract

Soil water characteristic curve (SWCC) is one of the most essential hydraulic properties that play fundamental role in various environmental issues and water management. SWCC gives important information for water movement, soil behavior, infiltration, and drainage mechanism, affecting the water circle and the aquifer recharge. Since most of the world’s freshwater withdrawals go for irrigation uses, decoding SWCC is beneficial, as it affects water saving through irrigation planning. Estimation of crucial parameters, such as field capacity (FC) and permanent wilting point (PWP) is the key solution for water saving. Modelling of the SWCC and hydraulic parameters estimation are of great importance, since the laboratory experimental procedures and the experiments in the field are often time-consuming processes. In the present study, the SWCC along with FC and PWP of two soil types were obtained via specific experimental procedures in the laboratory. In order to simulate the SWCC and estimate FC and PWP, the experimental data were approximated with van Genuchten’s model. Results showed that using SWCC to estimate FC gives excellent results, while the method rationally overestimates the PWP. Hence, the presented method leads to estimation of crucial hydraulic parameters that can be used in irrigation planning and water saving practices.

Suggested Citation

  • Anastasia Angelaki & Vasiliki Bota & Iraklis Chalkidis, 2023. "Estimation of Hydraulic Parameters from the Soil Water Characteristic Curve," Sustainability, MDPI, vol. 15(8), pages 1-16, April.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:8:p:6714-:d:1124456
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    References listed on IDEAS

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    1. Liang, Xi & Liakos, Vasilis & Wendroth, Ole & Vellidis, George, 2016. "Scheduling irrigation using an approach based on the van Genuchten model," Agricultural Water Management, Elsevier, vol. 176(C), pages 170-179.
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    Cited by:

    1. Abdul Halim Hamdany & Martin Wijaya & Alfrendo Satyanaga & Harianto Rahardjo & Zhai Qian & Aswin Lim & Jong Kim, 2023. "Numerical Simulation on the Effect of Infiltration and Evapotranspiration on the Residual Slope," Sustainability, MDPI, vol. 15(11), pages 1-15, May.

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