[hydrodynamic] A water tunnel is an experimental facility used for testing the hydrodynamic behavior of submerged bodies in flowing water. It is very similar to a recirculating wind tunnel but with water as the working fluid, and related phenomena are investigated, such as measuring the forces on scale models of submarines or lift and drag ...
Found on
http://en.wikipedia.org/wiki/Water_tunnel_(hydrodynamic)
[physical infrastructure] Water tunnels are tunnels (below-ground channels) used to transport water to areas with large populations or agriculture. They are part of aqueducts. ==Notable water tunnels, or systems including water tunnels== ...
Found on
http://en.wikipedia.org/wiki/Water_tunnel_(physical_infrastructure)
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