Generational Dynamics Forum - New Site

aedens wrote: Time line (Daniel 9)
June 2011 + (2520 Days + 30 Days + 45 Days) = July 2018

2018 July 27th Tu B’Av, central lunar eclipse, “Bull’s-eye Blood Moon”, directly in line with Jerusalem.

Time line (Luke 21:32, Psalms 90:10, Dan 9)

1948 + 70 years = 2018
1968 + 50 years = 2018
2011 + 7 years =2018

Higgenbotham wrote:Now let's say at some point in the future there's a water system in Detroit or some other major city in a state of disrepair and the water comes on for a few hours per day. The water system engineers find a way to get the water pumped the required 20 miles and someone out in the far reaches of the system in a suburb of Detroit can open their tap for a few hours per day and get some water. Problem solved, right? No, not in this case. The reason is that all the piping is underground. The underground piping is going to have leaks in it. At present there are water systems that are losing substantial amounts of water to leaks in the system piping. That occurs in the midst of drought conditions. Getting back to the point of this, a water system that has pipe leaks must be pressurized all the time. That is because the underground pipe has pressure acting against it and if the pipes aren't pressurized from the inside all the time you will be basically drinking the runoff that ends up in the soil around those pipes. Most of which is probably contaminated with chemicals and pathogens around the distribution system of any large city. So while it's OK for your lights to flicker on and off a few hours per day, it's not OK for your water system to operate in that manner.

Water pressure is an important factor to consider when planning a distribution system. As a rule of thumb, the water pressure throughout the distribution system should be no less than 17 PSI. In many high value districts, distribution lines are designed for a normal pressure of between 60 and 70 PSI.

Low pressure in the mains can be a health hazard since the pressure in the pipes keeps contaminated water from entering the mains. If the pressure in a pipe is too low or is negative, contaminants from nearby ditches, cross-connections, and poor quality house plumbing can be drawn into the water system.

Investigations have proven that most water-borne disease outbreaks are the result of contamination of water after it is pumped into the distribution system. To prevent contamination, an adequate chlorine residual must be maintained and the residual pressure should never be allowed to fall below 20 PSI. The Virginia Department of Health issues an advisory for extra-precautionary measures during periods of low pressure or vacuum.

http://water.me.vccs.edu/concepts/pressuredistr.html

If the system has elevated storage nearby and enough water can be pumped to elevated storage while power is on to hold pressure in the system the rest of the day, then those people will be OK.

It's surprising how difficult is was to find a reference which describes this in layman's terms. These concepts are very basic to the operation of the infrastructure of a civilization and it seems this knowledge has almost been lost. This reference came from a web site called Virginia Community Colleges.