Average displacement of creep seems to be identical to wavelength of ripples in stable stage (Andersen, 1987; Wang et al., 2009; Andreotti et al., 2006; Zhang et al., 2014), however, it is not inevitably that reptating particles can control pattern of the ripples due to clear physical explanation, involving complex physical processes as saltation flux and deposition rate (Durán et al., 2014) as well as factors that have not been known up to today.