a$)$ Write a technical definition for "water pollution" and discuss it$.$

$(5$ marks$)$

b$)$ Briefly discuss how the following parameters influence Source Water

$(5$ marks$)$

Quality: $($I$)$ Geology; $($ii$)$ Urban runoff

c$)$ Discuss the role of aeration, filtration, and disinfection processes in the

$(8$ marks$)$

drinking water treatment.

d$)$ A wet well is $57m.$ The influent flow to the well, measured upstream, is

$(7$ marks$)$

$2\mathrm{.}2\frac{m^3}{m}in.$ If the wet well rises $7\mathrm{.}5cm$ in $5$min, how many $m^3$ per minute is the pump discharging.

Total marks for Question $1$: $25$ marks

a$)$ Define the municipal wastewater and discuss the significance of the $(5$ marks$)$ wastewater contaminants.

b$)$ What are the factors that affecting the per capita demand?

$(5$ marks$)$

c$)$ Describe the basic aims of Secondary treatment

$(8$ marks$)$

d$)$ Records of observation during a month $(30$ days$)$ period shown that a flow $(7$ marks$)$ rate $0\mathrm{.}065\frac{m^3}{sec}$ for $8$ days, $0\mathrm{.}085\frac{m^3}{sec}$ for $10$ days, $1\mathrm{.}6\frac{m^3}{sec}$ for $1$ day, $0\mathrm{.}354\frac{m^3}{sec}$ for $2$ days, $0\mathrm{.}15\frac{m^3}{sec}$ for $6$ days, and $0\mathrm{.}075\frac{m^3}{sec}$ for