Canals, or navigations, are human-made channels, or artificial waterways, for water conveyance, or to service water transportvehicles. In most cases, the engineered works will have a series of dams and locks that create reservoirs of low speed current flow. These reservoirs are referred to as slack water levels, often just called levels. A canal is also known as a navigation when it parallels a river and shares part of its waters and drainage basin, and leverages its resources by building dams and locks to increase and lengthen its stretches of slack water levels while staying in its valley.

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拍攝者： Sarfrazalii