QUESTION $3$

Use the Thiessen method to determine the average rainfall for the catchment shown in the figure below. The rainfall recorded is tabulated below.

$($Ans ~~$19*6mm$

$\backslash$table$[[$Station$,$A$,$B$,$C$,$D$],[$Rainfall $(mm),8,14,10,40]]$

QUESTION $4$

The hourly rainfall of a storm over a $20k{m}^2$ catchment is provided below. The average runoff measured at a gauging station along the river draining the catchment was $5\mathrm{.}1\frac{m^3}{s}$ and lasted for $24$ hours. Determine the phi index for the catchment. $($Ans ~~$5\mathrm{.}3m\frac{m}{h})?$

$\backslash$table$[[$Hour$,$Storm $(mm)$