EXAMPLE $9\mathrm{.}9$

Given below is a hydrograph that resulted from an isolated $2-$hour duration storm of $1\mathrm{.}5$ in$.$ rainfall excess. Determine the streamflow hydrograph from the storm sequence indicated. Assume that the losses amount to $60\%$ of the precipitation.

Hydrograph data:

$\backslash$table$[[$Time $($hr$),0,1,2,3,4,5,6,7,8,9,10],[$Flow $($cfs$),151,146,268,562,660,630,510,370,250,190,150]]$

Storm sequence data:

$\backslash$table$[[$Time units $=2hr,$Unit $1,$Unit $2,$Unit $3,$Unit $4],[$Precipitation $($in$.),1,2\mathrm{.}75,4\mathrm{.}5,2\mathrm{.}25]]$