We appreciate the interest that van Milligen and Bons have shown in our experimental study of hillslope evolution (Roering et al., 2001a). They argue that particle diffusion is a poor model for disturbance- driven creep and landsliding processes on hillslopes. We agree with this assessment and nowhere in our paper did we suggest otherwise. Their comments on our work appear to arise from several fundamental misconceptions, which we welcome the chance to clarify.

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van Milligen and Bons misinterpret our slope-dependent transport law as implying that sand grains are transported by diffusion (even though that term does not appear...

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