A big city needs a lot of water. Some cities are near
big lakes or rivers. They find it easy to get enough water.
But
very often the lakes or reservoirs upon which a city depends for water are
many miles from the city. Then aqueduct must be built.
The
word “aqueduct” comes from two Latin words which mean “water” and “to
lead.” An aqueduct, then, is a man-made channel to carry water from a
lake or reservoir city.
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| Water and Lead |
Some
aqueducts are huge steel pipes laid above ground. Others may be canals,
open troughs or tunnels.
Most
aqueducts gradually slope downhill so that the water flows by gravity.
In
some cases, great metal siphons carry the water over hills, under rivers and
across valleys, in much the same way you might siphon water from a bucket with
a rubber hose.
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