Stepped-bed morphology in arid gravelly channels

The role of morphology on the displacement of particles in a step–pool river system

“…Chartrand and Whiting (2000) have shown that the step spacing was 0.6 time the channel width (W), while Bowman (1977) reported a spacing of 1.4W. Chin (1989) obtained a spacing of 2.7W for step-pools in Santa Monica Mountains (Colorado).…”

“…Step-pool channels occur in a wide range of bioclimatic environments (Bowman, 1977), from arid (Wohl and Grodek, 1994) to humid forested areas (Heede, 1972). They are commonly found in steep headwater mountain streams, where the channel width to depth ratio is small, bed material is heterogeneous, and slopes exceed 4 to 7% (Chin, 1989;Grant et al, 1990;Grant and Mizuyama, 1991).…”

Stream channel convexity induced by continuous base level lowering, the Dead Sea, Israel

“…The detailed morphology of the area, including the evolution of the telescopic fan sequence, had been summarized by Bowman (1971Bowman ( , 1977Bowman ( , 1978Bowman ( , 1988Bowman ( , 1990Bowman ( , 1997. The first generation of fan deltas was deposited into Lake Lisan at its highest stand (Fig.…”

“…The sediments of the stream bed in the study area consist of 4%-26% sand (Bowman, 1977;Cohen, 2005). The coarse bedload shows a wide range of grain sizes: d 50 falls within the fractions of granules to pebbles and d max ranges up to boulder size.…”

Experimental Investigation of Cluster Bed-Form Formation Over Uniform Sediment

“…Gravel bed Rivers contains two scale-classes of bed-forms: (1) macroscale or macro-forms, e.g., step-pool and pool-riffle sequences (Bowman, 1977) and (2) micro-scale or cluster microforms, e.g., cellular structures and pebble clusters (Brayshaw, 1984;Reid and Hassan, 1992;Church et al, 1998;Lawless and Roberts 2001;Papanicolaou et al, 2003). This study concentrates on cluster microforms.…”