Hydraulic engineering as a sub-discipline of
civil engineering is concerned with the flow and conveyance of
fluids, principally
water and sewage. One feature of these systems is the extensive use of gravity as the motive force to cause the movement of the fluids. This area of civil engineering is intimately related to the design of
bridges,
dams,
channels,
canals, and
levees, and to both sanitary and
environmental engineering.