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Re: Re[2]: a generic water encapsulation technique [Re: floods]

  • From: Eric Germann
  • Date: Sat Apr 12 04:34:35 1997

That would be traffic shaping and priority queueing, right?

New features in the latest rev of plumbing management software.

At 09:17 AM 4/11/97 EST, [email protected] wrote:
>What you said is true if the drain system treats all fluids equally.  But 
>consider the difference between these fluids.  
>It is much more important that sewage water, with its Constant Flow Rate,
get to
>its intended destination and not leech its pollutants into the ground.
>water, with a bursty Variable Flow Rate, will not cause environmental
damage if 
>leeched into the ground during overflow cases.  What is needed is a drain
>which can distinguish between storm water and sewage.  
>______________________________ Reply Separator
>Subject: Re: a generic water encapsulation technique [Re: floods]
>Author:  [email protected] at SMTPLINK
>Date:    4/10/97 10:56 PM
>Kent W. England wrote:
>> We could also multiplex the rain water with the sewage water in a
>> multi-mode drain system. Internet drain specialists tend to take religious 
>> points of view on whether we should have separate drain systems, should
>> combine them, or outlaw one in favor of the other. But, clearly, 
>> encapsulation is the favored approach.
>The multiplexed drain system will never work.  Sewage water we know
>to be a fairly constant flow over time,  and in fact sanitary engineers 
>refer to it as having a Constant Flow Rate.  Storm water, on the other 
>hand, is
>very bursty in nature, and sanitary engineers describe that as Variable 
>Flow Rate.  In the old days they tried combining drain systems, sharing 
>the resources between the CFR water and the VFR water, and called the 
>result AFR (or 
>available flow rate).  AFR had one weakness, however: it relied upon a 
>phenomena called precipitation shaping to keep the VFR storm water from 
>interfering with the CFR sewage water.  As the clouds and the ground 
>have enough buffering to do proper precipitation shaping, the result was 
>a drain system which periodically suffered massive congestion, and all 
>users were equally unhappy.
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