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Erodibility of road batters under simulated rainfall

Abstract Rainfall simulation experiments on road batters in a forest catchment in New South Wales, Australia, demonstrated the limits of small scale erosion studies. Comparable erodibility studies were carried out on road surfaces, road batters constructed of soil, bedrock and unconsolidated materials and the forest surfaces. There was no significant difference in sediment loss between any type of site, nor was there any significant relationship between sediment loss and either slope, materials or vegetation cover. The difficulties in obtaining any relationships between sediment loss, slope, cover and material type have implications for the usefulness of models which attempt to predict soil losses, as well as for future experimental work of this type.