Magnitude-frequency of bed load transport in mountain streams in Colorado

Factors controlling phosphorus speciation in a Mediterranean basin (River Guadalfeo, Spain)

“…Torizzo and Pitlick, 2004). Thus, studies on the properties of riverbed sediment are necessary to be linked to river discharge and riverbed scouring.…”

Effective discharge in Rocky Mountain headwater streams

“…One reason for assuming Q bf as the channel forming and design discharge (e.g., Biedenharn et al, 2000;Doyle et al, 2007) is that the information required to compute Q eff is not available at unmeasured sites. Another reason for the substitution is that many magnitude-frequency analyses, including those performed in coarse-bedded mountain streams, have reported a similarity between Q eff and moderate flows such as Q bf (e.g., Wolman and Miller, 1960;Nolan et al, 1987;Andrews, 1980;Nash, 1994;Andrews and Nankervis, 1995;Batalla and Sala, 1995;Whiting et al, 1999;Pitlick and Van Steeter, 1998;Torizzo and Pitlick, 2004;Doyle et al, 2007;Barry et al, 2008). However, several studies observed a difference between Q bf and Q eff and suggested that Q eff systematically increases with sediment rating curve steepness http://dx.doi.org/10.1016/j.jhydrol.2014.09.080 0022-1694/Ó 2014 Elsevier B.V. All rights reserved.…”

Effective discharge for sediment transport in a mountain river: Computational approaches and geomorphic effectiveness

“…Bedload transport is the main geomorphologic factor in streams having coarse, well-sorted bed sediments, even though quantitatively this can be lower than suspended sediment transport (Lenzi et al, 2003). However, bedload is more expensive and difficult to measure rather than suspended sediment transport, hence in the few papers dealing with bedload effective discharge, empirical formulae (Andrews, 1980;Torizzo and Pitlick, 2004) or, at most, bedload rating curves have been used (Whiting et al, 1999;Emmett and Wolman, 2001). Several studies have been criticized for using this approach (see Dury, 1973;Carling, 1988;Newson, 1980), because treating sediment transport as a continuous function of water discharge does not consider that it can increase dramatically when some discharge thresholds are passed (Nash, 1994).…”