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. Saturated hydraulic conductivity (Ksat) is an importantsoil parameter that highly depends on soil's particle size distribution(PSD). The nature of this dependency is explored in this work in two ways,(1) by using the information entropy as a heterogeneity parameter of the PSDand (2) using descriptions of PSD in forms of textural triplets, differentthan the usual description in terms of the triplet of sand, silt, and claycontents. The power of this parameter, as a descriptor of ln⁡Ksat, was tested on a database larger than 19 000 soils.Bootstrap analysis yielded coefficients of determination of up to 0.977 forln⁡Ksat using a triplet that combines very coarse, coarse,medium, and fine sand as coarse particles; very fine sand, and silt asintermediate particles; and clay as fine particles. The power of thecorrelation was analysed for different textural classes and differenttriplets using a bootstrap approach. Also, it is noteworthy that soils withfiner textures had worse correlations, as their hydraulic properties are notsolely dependent on soil PSD. This heterogeneity parameter can lead to new descriptions of soil PSD, otherthan the usual clay, silt, and sand, that can describe better different soilphysical properties, that are texture-dependent.

Technical note: Saturated hydraulic conductivity and textural heterogeneity of soils