Fig. 4

Laboratory experiments were conducted using three types of debris with \({T}_{d}/h\)=0.27 and \({d}_{ap}/B\)= 0.1. (a) Triangular, (b) semi-circular and (c) rectangular.

Laboratory experiments were conducted using three types of debris with \({T}_{d}/h\)=0.27 and \({d}_{ap}/B\)= 0.1. (a) Triangular, (b) semi-circular and (c) rectangular.