“…Flow and sediment transport in open channels are key research topics in hydrodynamic engineering, and several numerical models have been successfully developed in this regard (van Rijn and Tan, 1985;Brørs, 1999;Wu et al, 2000;Shen et al, 2003aShen et al, , b, 2008Liang et al, 2005;Wu and Li, 2007;Zhang and Liu, 2007;Zeng et al, 2008;Liu and Shen., 2010). Usually, fl ow and sediment transport are considered to be three-dimensional phenomena, and 3D turbulent models are developed to simulate them (Wu et al, 2000;Shen et al, 2002Shen et al, , 2003aShen et al, , b, 2004Shen et al, , 2008Zeng et al, 2008;Liu and Shen, 2010).…”