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Abstract

Owen, R.C. Soil strength and microclimate in the distribution of shallow landslides

During the winter of 1977 the Wairarapa hill country experienced a prolonged period of wet conditions which resulted in an episode of widespread and severe landslide erosion. The areal distribution of the landslides has previously been shown to be closely related to hillslope aspect. In this work regolith strength is shown to be low and correlated with aspect. When the soils are saturated, the liquid limit water content of the sunny aspect subsoils is exceeded while that of the shady aspect subsoils is not.

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