a generic water encapsulation technique [Re: floods]
Eric Germann
ekgermann at cctec.com
Fri Apr 11 14:21:03 UTC 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, pkavi at 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 at 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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