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1 2011

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Pinhole test for identifying susceptibility of different horizons in less - derived soils to piping erosion

Nadal-Romero M. E., Verachtert E., Poesen J.

Landform Analysis

2011

Vol. 17

131-134

The pinhole test is an empirical test based on the qualitative evaluation of the dispersivity (colloidal erodibility) of compacted fined-grained soils. This study evaluates the pinhole test device for the quantitative assessment of the susceptibility of soil horizons to piping. The experiments performed on different loess-derived soil horizons, with different hydraulic head and using distilled water show that the clay-enriched horizon (Bt horizon) is less susceptible to piping than the decalcified (C1) and the calcareous horizon (C2). This study demonstrates that the pinhole test is suitable for assessing the susceptibility of soil horizons to piping in a quantitative way.