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HYDROLOGIC CALCULATIONS <br />• <br /> UPSTREAi<I BASIN CONTRIBUTING TO CHANNEL <br /> WAS DNIDED INTO 4SUB-BASINS <br /> BASIN ARZEA Lolt Lch Lt Tc Tt <br /> Mi Ft Ft FT Hr Hr <br /> <br /> A .52 2300 4600 400 .45 0 <br /> B .45 3100 3250 2700 .42 .17 <br /> C .31 2400 2600 2700 .33 .17 <br /> D .08 1000 2700 0 .24 '0 <br /> Lolf =OVERLAND FLOW LENGTH <br /> Leh = LENGTH IN A CHANNEL TO INTERSECTION 1VITH MAIN STREAM <br /> Lt =LENGTH IN MAIN STREAM TO DESIGN POINT <br />. AVERAGE OVERLAND SLOPE = 20% AVE Volf = 4fps <br /> AVERAGE CHANN EL SLOPE = 8.5% AVE Vch = 4.5 fps <br /> FOR BASIN A Tc = Lolf +Lch = 2300 + 4600 = 16005 = .45 HR <br /> Volf Vch 4 4.5 <br />Tt = Lt = 400 = 90S = .02 HR <br />Vch 4.5 <br />CURVE NUMBER 79 BY INSPECTION OF ENGINEER <br />STOR NI <br />10 Year 24 Hour <br />25 Year 24 Hour <br />100 Year 24 Hour <br />PRECIP. RUNOFF <br />1.90 .45 <br />2.26 .68 <br />2.77 1.05 <br /> <br />