Vegetation in estuaries,coastal and river areas is often submerged.The study of its interaction with the ambient flow environment is crucial in understanding the complex flow structure and how this could impact both morphological and ecological conditions.The present work illustrates the numerical assessment of scour and deposition,and flow around submerged artificial single vegetation stems of different bent angles.By means of Renormalized group turbulent model(RNG)in FLOW-3D code,4 cylindrical stems; 1 vertical and 3 at bend angles(0°,30° and 45°)were investigated.These computations are based on previously conducted laboratory experiments.Generally,the numerical results compare well with flume experiments in terms of flow.Spatial distribution of scour and deposition are also well captured by the numerical model; moreover,underestimation of both scour and deposition are observed.Scour and deposition were shown to be dependent on the bend angle,with vertical cylinder having large scour depth,while stem at 45° had the least.The study provide insight to these complex interactions between vegetation and flow,and it would be of paramount importance to extend this code to flexible vegetation.