ouacer, B. NK ateb, SAbd Elouahed, B .2023-05-312023-05-312021-01-01B. N ouacer S K ateb B . Abd Elouahed,EXPERIMENTA L APPROACH TO THE LENGTH OF THE THRESHOLD CONTROLLED HYDRAULIC FLOW IN A RECTANGULAR CHANNEL WITH A ROUGH BOTTOM .Journal of Fundamental and Applied Sciences.VOL13 N01.01/01/2021.university of el oued [visited in ../../….]. available from [copy the link here]http://dspace.univ-eloued.dz/handle/123456789/25308AricleThe study proposes to examine, by the experimental route, the effect of roughness on the hydraulic jump length in rectangular channel. A comparative study between the characteristics of the jump controlled by a threshold with a smooth and rough bottom is proposed. The results of this research can be applied in the hydraulic load dissipation basins of dams and also in irrigation lines, using the ability of the projection to raise the water level downstream of the flow.enKeywords: Hydraulic jump, controlled by threshold, rectangular channel, energy dissipation basin, smooth bottom, rough bottomArticle