GUESRI, MOURAD2023-04-262023-04-262014H/U006/14http://dspace.univ-msila.dz:8080//xmlui/handle/123456789/35856Floodsa re a typical of unsteadyfl ows casesT. hesef lows are governedb y the hydraulic modelss uch 1D modelsw hich are basedo n theBarré-SainVt enant equationsr epresentingth e conservationla ws of massa nd momentum.I n this work, we used the lD code "Rhubarb"o f Irsteao f Lyon to simulatet he violent flood of 23-09-1994o n the reacho f K'sob wadi which crossesth e city of M'sila. The obtainedr esultsw ereu sedt o draw the overflow aleal imits; these limits \ilerec omparedto the real limits with a gooda ccuracy. A secondp art of this work was devotedt o the examinationo f the effect of the losslaws on the quatity of the results of hydraulic codes. Through a several simulations (in the same conditions)w ith six friction formulas,w e found that thesef ormulasc an significantlyd isrupto r enhanceth e resultso f Rhubarb.accordintgo the validify domaino f the usedf ormulafrThesis