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Question on water demand


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#1 ipswitch

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Posted 09 July 2010 - 03:23 PM

I don't really understand how they derive 25 gpcd storage requirement in the answer to part b of this question. I'm guessing it involves some sort of very simple linear regression stuff. If anyone can just lay it out for me like a child I'd be appreciative.




#2 ipswitch

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Posted 10 July 2010 - 02:05 AM

QUOTE (ipswitch @ Jul 9 2010, 03:23 PM) <{POST_SNAPBACK}>
I don't really understand how they derive 25 gpcd storage requirement in the answer to part b of this question. I'm guessing it involves some sort of very simple linear regression stuff. If anyone can just lay it out for me like a child I'd be appreciative.


OK, I pretty much worked my way around this method of answer and found a different way to answer the question. On page 26-20 of CERM it says storage is required of at least 15 to 20% of daily use. If you use 15% of the cumulative gpcd you get 30 gal/person-day storage. That gets you the answer.

#3 jregieng

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Posted 29 August 2010 - 07:25 PM

Is the answer close enough to the "right" answer so you don't pick a wrong answer?

JR




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