50YEAR RETURN PERIOD Q=31.66m3/s Allow for a free board of 0.1m D=2.2m B = 1.809 * 2.09 = 3.7 Hydraulic mean depth M1= 0.5D = 0.5*2.09=1.045 B=3.7m By manning’s formula: = 4.7m/s > 3.0m/s NOT O.K Area of flow, A= 1.909D2 =8.34m2 V=4.7m/s Capacity of channel QC = 40.04m3/s >31.66 m3/s A=8.34m2 QC=40.04m3/s CALCULATION SHEET OPEN FROM MWALIMU HOUSE TO TROPICAL FASHION HOUSE NO. 10 REF CALCULATIONS OUTPUT
50YEAR RETURN PERIOD Q=31.66m3/s Allow for a free board of 0.1m B = 1.809 * 2.09 = 3.7 Hydraulic mean depth M1= 0.5D = 0.5*2.09=1.045 By manning’s formula: = 4.7m/s > 3.0m/s NOT O.K Area of flow, A= 1.909D2 =8.34m2 Capacity of channel QC = 40.04m3/s >31.66 m3/s D=2.2m B=3.7m V=4.7m/s A=8.34m2 QC=40.04m3/s CALCULATION SHEET OPEN FROM MWALIMU HOUSE TO TROPICAL FASHION HOUSE NO. 10 REF CALCULATIONS OUTPUT
SOPIA%20.S.%20SHILLAH.docx