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

[Eric Germann <ekgermann () cctec com>]

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, pkavi () pcmail casc com wrote:
>     
> Peter,
>
> 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.
Storm 
> 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
system
> which can distinguish between storm water and sewage.  
>
> Prabhu
>
>
> ______________________________ Reply Separator
_________________________________
> Subject: Re: a generic water encapsulation technique [Re: floods]
> Author:  peter () tdi net 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 
> didn't 
> 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.
>     
> -peter
>     
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