BACKGROUNFD INFO

Rainwater Data

Here is the average monthly rainfall for Phoenix:

Month Rainfall $($in$)$

January $0\mathrm{.}83$

February $0\mathrm{.}77$

March $1\mathrm{.}07$

April $0\mathrm{.}25$

May $0\mathrm{.}16$

June $0\mathrm{.}09$

July $0\mathrm{.}99$

August $0\mathrm{.}94$

September $0\mathrm{.}75$

October $0\mathrm{.}79$

November $0\mathrm{.}73$

December $0\mathrm{.}92$

Water Demands

The client is a family of four $(2$ adults, $2$ children$).$ The normative water CONSUMPTION profile for each

member $($per person per day$)$ of the family is:

Fixture Flow or

Volume per

use

Uses $/$ Day

WEEKDAYS

Total gppd$*$

WEEKDAYS

Uses $/$ Day

WEEKENDS

Total gppd$*$

WEEKENDS

Shower $2\mathrm{.}0$ gpm $5$ min $10$ gal $8$ min $16$ gal

Lavatory Faucet $1\mathrm{.}5$ gpm $2$ min $3\mathrm{.}0$ gal $5$ min $7\mathrm{.}5$ gal

Toilet $1\mathrm{.}3$ gpf $3$ flushes $3\mathrm{.}9$ gal $4$ flushes $5\mathrm{.}2$ gal

Kitchen Faucet $2\mathrm{.}0$ gpm $1\mathrm{.}25$ min $($see below$)1\mathrm{.}75$ min $($see below$)$

Food & Drinking $1\mathrm{.}5$ gal $2\mathrm{.}0$ gal

Washing$/$cooking $1\mathrm{.}0$ gal $1\mathrm{.}5$ gal

Dishwasher $6\mathrm{.}5$ gpc $0\mathrm{.}25$ cycles $1\mathrm{.}625$ gal $0\mathrm{.}4$ cycles $2\mathrm{.}6$ gal

Clothes washer $20$ gpc $0\mathrm{.}4$ cycles $8$ gal $0\mathrm{.}4$ cycles $8$ gal

gppd $=$ gallons per person per day

gpc $=$ gallons per cycle

gpm $=$ gallons per minute

gpf $=$ gallons per flush

Assignment Instructions

PART A $$ Baseline Water Budget

$1.$ For each of the fixtures$/$appliance in the table above, note the total ANNUAL water consumption

and discharge for the ENTIRE HOUSEHOLD $(4$ people$).$ Also note the quality of the water discharged

from each use $($graywater or blackwater$).$ Indicate your answers in the table below. At first, we$$ll

assume that ALL uses require potable water supplies and then consider alternatives in later parts of

the assignment.

Per the ground rules noted above, we will also assume that the water discharge equals the water

supply $($no water is lost AT the fixture $$ this is not generally true, but we$$ll assume this for

simplicity$).$

Note that there are separate water use rates for WEEKDAYS and WEEKENDS $($which is typical for this

kind of use schedule as people are not always home during the WEEKDAYS. Start by finding the

number of weekdays and weekend$-$days there are in a typical year. Note that if you divide the year

into weeks $(52),$ there is one day $$missing$.$ Assume that it is a WEEKEND day.

Round your numbers to the nearest gallon.

Fixture $/$Appliance Total annual

consumed $($gal$)$

Discharged water

quality after use

Total annual

discharged $($gal$)$

Shower

Lavatory Faucet

Toilet$*$

Kitchen Faucet

consumed lost $/$ unavailable $0**$

sink drain

Dishwasher

Clotheswasher

TOTAL

$*$ for Part A$,$ we will assume that flush toilets are used.

$**$ per the groundrules, all water consumed by people will be lost to evaporation or converted to

urine.