Q$1(5$ marks$)$ Circle the most correct answer for the following statements:

When rainfall is controlled by topography, the most accurate method to estimate average rainfall is:

a$)$ Arithmetic mean

b$)$ Isohyets method

c$)$ Weighted average

d$)$ Thiessen polygon

If the loss of water due to evaporation is $0\mathrm{.}5c\frac{m}{?}$ day from a $20k{m}^2$ lake and the average dally consumption is $80\frac{L}{c}\frac{?}{d},$ then the number of people that could benefit from this loss is:

a$)8000$

b$)80,000$

c$)125,000$

d$)1,250,000$

Using rainfall stations that are close but located outside the watershed:

a$)$ Decreases accuracy of Thiessen Polygon method

b$)$ Increases accuracy of Thiessen Polygon method

c$)$ Introduces error in rainfall estimation.

d$)b+c$

The following is not considered part of hydrology:

a$)$ Occurrence of water

b$)$ Physical properties of water

c$)$ Distribution of water

d$)$ None of the above

When soll is saturated, the excess water that penetrates downward to the saturated zone is called:

a$)$ Runoff

b$)$ Baseflow

c$)$ Depression storage

d$)$ None of the above