water calculation

How many people will be occupying the structure? Assume between 200 - 250 liters of water per person per day on average.

In SA the basic minimum water requirement is set (per regulation) at 25 litre per person per day. (5.5 imperial gallon per day )

As this is very basic you may have to estimate the use by taking more detail into consideration including :- Sex (male/female not frequency), personal hygiene bath/shower/none, type of food snacks/full meals, background , culture, habits etc.

Do you have storage?

I would not like to be sitting next to someone from this country on even a short haul flight! Sex is definitely out!!

Just joking..

This cannot be correct. I have been in South Africa and I am sure they use very much more than their minimum basic water requirement.

You are correct Sisira. That guy is mad...may he is BOB

you can roughly consider 250 liter per day for each one of building occupants ,kitchen and toilets are included , under ground tank should be enough for at least one day, it may be larger if your building located in poor water area .roof top tank should be enough for around 3 hours .

Just FYI : I think this will be better in the room of CIVIL ENGINEERING. Did you . . . .

Hi Ramisomhned,

DVader1000 and I got same calculation of 200-250 per person thats includes everthing, bathing, cooking, laundry. etc, this should be more than enough. I think you must take also into account if the units designed required fire hydrant sucking from the same tank in the event of fire, then your tank capacity must have enough stock to extinguish the fire. but of course depending on your water source if the refilling is continous then 62.5 m3 tank capacity underground should be suffecient enough. bit comfusing "roof" as you never mentioned if how many floors and why you preferred to have tank on top of the roof? if it is only two storey building just use booster pump, but if it is more than 6 floor try to find and design variable booster pump.