Abstract
Previous studies have generally focused on abutments located on a
straight channel. Few have focused on curved channels. The present study
comprised an experimental examination of the local scour that occurs
around different length abutments placed on the inner and outer banks
along a curved channel in a clear-water scour flow condition. The local
scour around an abutment in a curved channel is a function of the
upstream Froude number, flow intensity, the angle of bend curvature, and
the ratios of abutment length to flow depth, abutment length to abutment
width, and abutment length to channel width. The maximum scour depth
around the abutments placed on the outer bank was found to be 1.45 times
the scour depth on the inner bank. An empirical equation was developed
to consider all dimensional parameters for equilibrium scour depth. The
average percent error of the proposed equation was 2%.