If i have 1 square meter pool. And there is 1000 kg of water in it which means 1 meter depth of water. Let's say we leave this pool in my city for 1 year.
There will be 600 mm precipitation and 1200 mm evaporation. Which means i will have 600 mm loss which is 60 cm which is 0,6 meters. So at the end of the year, my pool will have only 40 cm of water , which is 400 kg. So, every year , for every square meter i will need to add 400 kg(or liter) of water.
Is that calculation right?
No It's wrong you'll have to add 600 liter to be back at the original 1000liter
You gain 600 litre thru anual precipitation :
http://web.ead.anl.gov/resrad/datacoll/water.htm cut/paste quote: PRECIPITATION RATE
9.1 DEFINITION
The precipitation rate, Pr, is the average volume of water in the form of rain, snow, hail, or sleet that falls per unit of area and per unit of time at the site. It is measured in units of volume per area per time
Quote end.
And you loose 1200 litre thru anual evaporation :
http://www.waterandclimatechange.eu/evaporation cut/paste Quote:
Evaporation is an important process in the global water cycle. Solar radiation hits the surface of water or land and causes water to change state from a liquid to a gas.
Quote end
Remember you are on a US forum so when you do the mats don't mix mm kg and litre m3 in a equation and ask iff it's right is my 2c or 2 �re (or 0,02 LIRA)
cheers
