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S and K estimation

Complete Haverkamp model

  The sorptivity, S, and hydraulic conductivity, K, are estimated from the the inverse analysis of the full-time cumulative infiltration curve using the quasi-analytical Haverkamp et al. (1994) model (Latorre et al. 2015). A procedure to detect and remove the effect of the contact sand layer and a sensitivity analysis using the water level measurement as uncertainty source (e.g. air-bubbling in the infiltrometer) are also inlcuded.

                                1-D and 3-D infiltration3d-inf

 4-term Haverkamp expansion

References

  • Haverkamp R, Ross PJ, Smettem KRJ, Parlange JY. 1994. Three dimensional analysis of infiltration from the disc infiltrometer. Part 2. Physically based infiltration equation. Water Resources Research 30: 2931-2935.
  • Latorre B, Peña, C, Lassabatere L, Angulo-Jaramillo R, Moret-Fernández D. 2015. Estimate of soil hydraulic properties from disc infiltrometer three-dimensional infiltration curve. Numerical analysis and field application. Journal of Hydrology 527: 1–12.