Compute the time of concentration using the following methods:

For each method, compute travel time for each segment, sum segment travel times to determine catchment Time of Concentration, Tc

$($a$)$ NRCS$,$ CN method: Equation $3\mathrm{.}51$ with Table $3\mathrm{.}4$ to select CN

$($b$)$ Velocity$-$Slope method $($Manning Equation$)$: Table $3\mathrm{.}13,3\mathrm{.}14$ to compute velocity using slope $\backslash$& length

$($c$)$ Rainfall P$2($with Slope, Manning n value$)$: Equation $3\mathrm{.}48$ with Table $3\mathrm{.}13,3\mathrm{.}14$ to compute velocity using slope $\backslash$& length, and Figure $2\mathrm{.}4$ or Jefferson County MSD design IDF chart$/$table for P$2$ rainfall value

Problem $3\mathrm{.}49$

A flowpath consists of the following sections:

Estimate the time of concentration using the velocity method.

Conceptual Image of watershed for $\backslash$#$3\mathrm{.}49$: