Effect of bed roughness on hydraulic jump characteristics

الملخص EN

Hydraulic jump characteristics were measured over various types of artificially roughened test beds in a horizontal flume 5 cm bed width and smooth vertical side walls.

Roughness was created using 8.7 mm high cylindrical pins of 6 mm diameter.

The pattern; of roughness were staggered or parallel and also using strip and spotted roughness test bed, which provided the range of bed friction from 0.042 to 0.16 5.

It was observed that the bed roughness reduces the sequent depth and length of hydraulic jump; the observed reductions were related to the Froude number and the bed roughness.