“…These approaches appeared to be unsuitable for low-sloping beaches on which intertidal bars develop that emerge during ebb and produce multiple waterlines. The latter type of beach commonly occurs (Wijnberg and Kroon, 2002) and is monitored by several Argus stations, amongst which the three stations located along the Dutch coast Aarninkhof et al, 2003;Wijnberg et al, 2009). Madsen and Plant (2001) applied their automated tool to Duck beach (USA) to collect long time series on beach slope.…”