QUESTION $2$

$2\mathrm{.}1$ Estimate the index and the direct surface runoff for a storm with recorded $34,0cm$ rainfall, producing an equivalent excess rainfall of $27,5cm.$ The recorded time distribution for the storm is tabled below:

$\backslash$table$[[$Time from start $($hr$),1,2,3,4,5,6,7,8,9,10],[\backslash$table$[[$Incremental rainfall$],[$in each hr $($cm$)]],0,40,1,90,2,60,6,0,10,0,7,50,3,00,1,50,0,90,0,20]]$

$2\mathrm{.}2$ Using ruler measurements, draw closest to scale, a hyetograph showing both the excess rainfall and the losses.

$(8)$