Question $10$ a

$5$ Marks

The following data represents the ordinates at hourly interval for one hour unit hydrograph

$\backslash$table$[[\backslash$table$[[$Time$],[($hours$)]],0,1,2,3,4,5,6,7,8,9,10,11,12,13],[\backslash$table$[[$Unit$],[$hydrograph$],[$ordinates$],[$in$],[$cumecs$)]],0,580,1100,960,530,260,140,80,50,40,30,16,10,0]]$

Compute total run of hydrograph resulting from a two$-$hour storm rainfall with effective rainfall as follows: First hour $=2cm$ Second hour $=1cm$