Assume that the unit hydrograph developed in Prob. $3-36$ has an effective duration of $12hr$ and use it to calculate the river hydrograph for the two$-$day storm given below.

$\backslash$table$[[\backslash$table$[[$Time period$],[($hr$)]],\backslash$table$[[$Rainfall$],[($in$.)]]],[0-12,0\mathrm{.}9],[12-24,1\mathrm{.}8],[24-36,0\mathrm{.}4],[36-48,1\mathrm{.}9]]$

Assume a $$ index of $0\mathrm{.}05in\frac{.}{h}r$ and a base flow of $800cfs.$ Tabulate the entire hydrograph and indicate the time and magnitude of the peak flow. Plot the hydrograph.