Rescource Depletion Question

[CypressC]

I just started a new game and went with a tectonics map and decided to go with the rescource depletion option. What I am wondering is how this is handled in C2C. Using iron as an example, does it count the number of units built (swordsmen etc) or the number of iron smithies?
And is there anyway to up the occurrence of discovering a new resource or of having a new resource placed on the map whenever one runs out?
And finally, I am playing on a huge map, there are four continents but only five oil resources. I have never made it that far in C2C but if I do is controlling only two maybe three oil resources gonna cut it or should I add in some more now?

 

[Thunderbrd]

It's fairly at random I think.

 

[Yudishtira]

All I know is:

I had two of my three sources of Salt deplete on the same turn. If that was random, then it's done really badly. However, if they were my first two quarries built at the same time (and the other came later - I don't know how I'd work out whether this is the case btw), then both depleting simultaneously makes more sense - assuming of course that the game is keeping some sort of track of the source's capacity and my consumption.

Of course if that is the case, I think I should get prior warning that the source is 'drying up'...

 

[Dancing Hoskuld]

As far as I can remember it is completely random for each resource. Which means that many may go at the same time. There is no warning because the chance of depletion is checked each turn. This means that your iron can deplete before you get to use it on units. One of the reasons I don't use this option.

 

[masaykh]

Can Depletion be refactored?
so it will be checked against usage + % of small chance of random event ?

it will be more usefull and realistic