%0 Journal Article %T EXPERIMENTAL APPROACH THE LENGTH OF THE ROLL SURFACE IN A HYDRAULIC JUMP CHANNEL PROFILE %A A. Ghomri %A M. Debabeche %J International Journal of Chemical and Petroleum Sciences %D 2013 %I IJCPS %X This study aims to experimentally evaluate an experimental approach to the length of the roller surface of the hydraulic jump controlled by threshold, moving in a channel profile 'U' rough bottom roughness for different tested. a functional relation ship in dimensionless term, linking the different characteristics of the projection, showing the effect of the roughness of the channel bottom was obtained %K Hydraulic jump %K channal-shaped in U %K stilling basin %K channel bottom rough. %U http://www.ijcps.net/index.php/IJCPS/article/view/7/10