please answer for manhole B A 27-acre drainage basin comprising of seven sub-catchments is shown in Fig. 1. Determine the design flows (Q) entering manholes A, B,Ga.C, and E in cfs for a 5 year return period. The area, runoff coefficient and inlet time for each sub-catchment is shown in Table 1; thelength and slope for each pipe in Table 2. Use the rainfall intensity equation i = 1207 where i is the rainfall intensity in inches/hr, T isTa+27the return period and T, is the duration in minutes.IIAIIIVVpusEВVIVII Table 1. Characteristics of the drainage basinCatchmentAreaRunoffCoeficienthettime(acres)Ct(min)20.750.77II40.610IV40.610V0.515VI4.50.515VII4.50.515Table 2. Pipe characteristicsSlope(S,)SewerLength(ft)DiameterPipe(ft)ЕВ4501.750.0064АВ55020.0081BC40030.0064CD4503.50.0064

A = 27 acre T = 5 years return i=120T0.175Td+27=0.015 Pipe Length slope EB 450 0.0064 AB 550…

A 27-acre drainage basin comprising of seven sub-catchments is shown in Fig. 1. Determine the design flows (Q) entering manholes A, B, C, and E in cfs for a 5 year return period. The area, runoff coefficient and inlet time for each sub-catchment is shown in Table 1; the length and slope for each pipe in Table 2. Use the rainfall intensity equation i = 1207.170 Ta+27 where i is the rainfall intensity in inches/hr, T is the return period and T is the duration in minutes. A II IV V E В VI II

A 27-acre drainage basin comprising of seven sub-catchments is shown in Fig. 1. Determine the design flows (Q) entering manholes A, B, C, and E in cfs for a 5 year return period. The area, runoff coefficient and inlet time for each sub-catchment is shown in Table 1; the length and slope for each pipe in Table 2. Use the rainfall intensity equation i = 1207.170 Ta+27 where i is the rainfall intensity in inches/hr, T is the return period and T is the duration in minutes. A II IV V E В VI II

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter16: Highway Drainage

Section: Chapter Questions

Problem 9P

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