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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: a generic water encapsulation technique [Re: floods]
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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