Scour around solid cylindrical bridge piers was experimentally studied before on clearwater by Chiew [1], Laursen [2], Melville et al.[3], Nadana et al.[4], Raudkivi& Ettema [5], and Yassin& Rezk [6]. An analytical method for estimating the ultimate depth of scour based on experimental observation was made by Blaisdell [7]. A theoretical study was investigated by Johnson [8] to estimate the maximum local scour. Johnson [9] made a theoretical study, using a large set of field data for both live-bed and clear water scour, to compare seven bridge pier scour equations. Hoffmans et al.[10] made a theoretical study on local scour, using a morphological model, behind structures. Melville & Sutherland [11] developed a design method for estimating the equilibrium local scour depth at bridge piers. Larras [12] reported that equilibrium scour depth around bridge piers does not depend only on the pier Reynolds number but also on Froude number which is an essential element. Jain & Fisher [13] performed an experimental study on scour around circular bridge piers at high Froude numbers. Mirtskhoulava [14] discussed scouring processes of beds in