Local scour downstream of hydraulic structures due to hydraulic jump is considered one
of the tedious and complicated problems facing their stability. Throughout this paper, an experimental
study was conducted to study the effect of using different spaced corrugated aprons on
the downstream local scour due to submerged jump. Sixty runs were carried out in a horizontal rectangular
flume to determine the optimal corrugation wavelength which minimizing the scour. A case
of flat apron included to estimate the influence of corrugated aprons on scour holes dimensions.
Two types of non-cohesive soil were used. Experiments were performed for a range of Froude numbers
between 1.68 and 9.29. The results showed that using spaced triangular corrugated aprons minimize
the scour depth and length of fine sand by average percentage of 63.4% and 30.2%,
respectively and for coarse sand by 44.2% and 20.6% in comparing with classical jump. |
