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How does a
reservoir work?
Water flows
into reservoirs from different sources. It can be surface water from
lakes, rivers, streams, and rain. It can also be from groundwater
sources. Any of these can flow into the reservoir
naturally--that is, without help from man. The reservoir could be in
a place where the water would flow into it by itself. Other
reservoirs have water pumped into them and might be further away from
where the water actually comes from. Some reservoirs have pumped and
natural water.
When water leaves the reservoir, it is not treated for
anything. That is the job of the town that buys the water. It
does get a little filtration before it leaves. This is done to take
out big things that fall in the water so that they don't jam up the pipes
and machinery when it is pumped to other places. There are machines
that can lift logs and heavy things from the water. It filters out
fish, leaves, and things like that, too.
The two large reservoirs that we visited are linked by
large underground pipes. We were amazed to find out that when it was
built, it took 3 years for the largest one to fill up. When one gets
low, water is pumped through large pipes from the other reservoir.
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