Sewer - Until the new sewer system was built, raw sewerage went directly into the Thames which was also used for drinking water. The sewers in the streets join up to form larger
and larger pipes. Some sewers are as big as
underground railways tunnels.
Weir - A weir is a barrier across a river
designed to alter its flow
characteristics
. In most cases, weirs take the form of
obstructions smaller than most
conventional dams, pooling water
behind them while also allowing it
to flow steadily over their tops.
Aqueduct – How did the ancient Romans deal with plumbing? They built huge and extensive aqueducts, which is Latin for waterway. These under- and aboveground channels, typically made of stone, brick, and volcanic cement, brought fresh water for drinking and bathing as much as 50 to 60 miles from springs or rivers. Aqueducts helped keep Romans healthy by carrying away used water and waste, and they also took water
Pontoon - Pontoons are very simple, and may be used on boats, rafts, barges, docks, or seaplanes. Pontoons can be used to support platforms, creating a raft, floating docks, even houseboats. Common boat designs that feature pontoons include catamarans (two pontoons), or a trimaran that has three pontoons keeping it afloat. Pontoons have even been used on so-called, pontoon bridges.
A Waterfall.
A waterfall is made when water erodes at the rock face and makes a small drop that grows and grows and will eventually look amazing.
Reservoir - A reservoir is a large man-made lake used to store water. Reservoirs may be created in river valleys by the building of a dam or may be built by digging into the ground or by bricks or concrete. Rutland Water is Anglian Water's drinking water reservoir in the county of Rutland, England, and opened in 1976.
Hydroelectric power station -A dam is built to trap water, usually in a valley where there is an existing lake.Water is allowed to flow through tunnels in the dam, to turn turbines and thus drive generators.
Notice that the dam is much thicker at the bottom than at the top, because the pressure of the water increases with depth.
Hydro-electric power stations can produce a great deal of power very cheaply.