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Discussion of “Experimental study on the hydraulic conductivity of calcareous sand in South China Sea”

ABSTRACT Hydraulic conductivity of the granular soils depends on many factors including the soil density and the particle size distribution. For internally unstable soils, the hydraulic conductivity could be changed beyond a critical value of hydraulic gradient. This discussion calls attention to the effect of the internal stability on the hydraulic conductivity, where the internal stability of the soils is assessed and the critical hydraulic gradient is computed using some theoretical methods, and such calculations could be used to plan the experimental tests.