2004 Volume 48 Pages 1063-1068
In the present study, maximum scour depth around the bridge pier occurred during floods, were measured by means of brick installation under the bed surface near the piers. Field observation proved that it is possible to measure the actual and maximum scour depth by counting the bricks flushed by the floods. The target spot in the present study is Gudo point near the Shimanto-bridge at 9.5km upstream from the river mouth of Shimanto River of Shikoku-island in Japan. There were four main floods occurred for these three years from 2001-2003 and bricks have been flushed, so that the maximum scour depths were recognized for each flood and the scour hole and bed surface shows the significant variation. In this paper, the results of surveys for all these three years and characteristics of scour around Shimanto-river bride are discussed in detail.
