CHARACTERISTICS OF B-JUMP WITH DIFFERENT TOE LOCATIONS

A study of the effect of the location of the toe of a B-jump (relative to the break in the channel slope) on its characteristics was designe d and implemented. The experimental results were used to introduce new expressions for the hydraulic quantities that govern a B-jump. Three slopes were investigated: 1:3, 1:4, and 1:5 (vertical:horizontal). Mea surements of the length of the roller and the tail-water depth were al so made. Analysis of the experimental data showed the importance of in troducing a new parameter representing the effect of the relative loca tion of the toe of the jump along the sloping channel. The proposed ex pressions were developed for flows with the approach Froude numbers ra nging from 2.4 to 7.4.