Experimental Study on the Influence of New Permeable Spur Dikes on Local Scour of Navigation Channel

The depths and areas of the scour holes around spur dikes are most concerning issues regarding dike design. In this study, using a moving bed experiment, influence traditional rock-fill new permeable with different permeabilities on riverbed under unsteady flow was studied, spatial characteristics at heads were analyzed. results show that increases in permeability coefficient dike, depth area hole head gradually decreases; however, when is more than 17.6%, downstream body an increase coefficient. According to comprehensive evaluation, water stability its best. maximum affected by factors such as coefficient, effective scouring time, width bottom protection structure. On basis, formula for calculating proposed. These research will be beneficial reliability sustainability navigation channels.