Influence of soil spatial variability on the reliability of sandy slopes incorporating anisotropy and non-stationarity.

As for the second scenario, named RF type 2, the soil property shows an increasing trend along the direction perpendicular to the bedding.

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In Fig 8(a) with a slope ratio of 1:2, the reliability index values show a decreasing trend for all RF types (stationary RF, RF type 1, and RF type 2) with the minor autocorrelation distance, while in Fig 8(b) with a slope ratio of 1:1, the reliability index values show a slightly increasing trend.

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Meanwhile, the results of the reliability index under both stationary and non-stationary RFs show a decreasing trend in reliability indices as the minor autocorrelation distance increases.

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