Inverse estimation of hydraulic parameters of soils with rock fragments

Gubiani, Paulo Ivonir; Fachi, Suélen Matiasso; Lier, Quirijn de Jong van; Mulazzani, Rodrigo Pivoto; Pedron, Fabrício de Araujo; Šimůnek, Jirka

doi:10.1016/j.geoderma.2022.116240

Cited by 4 publications

(1 citation statement)

References 30 publications

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“…Hydrus-1D was a numerical model developed by the U.S. Salinity Laboratory 30 , the inversion parameters of which were numerically simulated by one-dimensional unsaturated soil water motion equation 31 and fixed solution conditions 32 . Ivonir et al 33 used Hydrus-1D combined with the water content ( θ ) and pressure head ( h ) to invert and optimize the hydraulic parameters, the simulation result of which was better. Tadesse et al 34 used Hydrus-1D to simulate soil water content and soil temperature combining data on precipitation, evaporation, and average temperature.…”

Section: Introductionmentioning

confidence: 99%

Effects of gravel on the water infiltration process and hydraulic parameters of stony soil in the eastern foothills of Helan Mountain, China

Ma,

Wang,

Zhang

et al. 2024

Sci Rep

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The investigation into the impact of gravel on water infiltration process and hydraulic parameters in stony soil could offer a theoretical basis to enhance water availability in rocky mountain area. A one-dimensional vertical infiltration experiment was used in this study. Six groups of gravel content of 0% (CK), 10% (W1), 20% (W2), 30% (W3), 40% (W4) and 50% (W5) were established to explore the changes in the wetting front, cumulative infiltration volume and infiltration rate. Then the accuracy of four infiltration models in simulating soil water infiltration processes was evaluated. Finally, Hydrus-1D was used to perform numerical inversion of the soil water content after infiltration. The findings revealed that: (1) When the infiltration time reached 300 min, the wetting front of the W1, W2, W3, W4 and W5 treatments was 11.00%, 17.00%, 32.25%, 38.75% and 54.50% lower than CK, the cumulative infiltration volume was 29.80%, 38.97%, 45.62%, 54.74% and 73.17% lower than CK, and the stable infiltration rate was 50.98%, 52.94%, 66.67%, 68.63% and 86.27% lower than CK. (2) The soil–water infiltration processes were accurately described by the Horton model, the coefficient of determination (R2) > 0.935. (3) The simulation results of Hydrus-1D showed that with the increase of gravel content, the values of the retention water content (θr), saturated water content (θs), shape coefficient (n) and saturated hydraulic conductivity (Ks) were decreased, the values of the reciprocal of air-entry (α) were increased. The value of R2 was more than 0.894, the root mean square error (RMSE) and mean absolute error (MAE) were less than 2%, which demonstrated that the Hydrus-1D model exhibited superior capability in simulating the changes of water content in stony soil in rocky mountain area. The findings of this study demonstrated that gravel could decrease the water infiltration process and affect the water availability. It could provide data support for the water movement process of stony soil and rational utilization of limited water resources in mountainous area.

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