Reservoirs
Reservoirs are man-made lakes, while smaller ones are known as ponds, ponds and reservoirs. The general method of formation is in the middle of the river to build the dam, the river flooded the valley after the formation of reservoirs. But some of the reservoirs are built on the sea, such as Hong Kong's Plover Cove. Dams are generally built in narrow valleys, because the sides of the hillside can be used as a natural wall of the reservoir, and the length of the dam can be greatly reduced. Before the construction, the houses and monuments that will be flooded with the need to be moved to other places. ...