Hydraulics deals with the mechanical properties of a liquid. Hydraulics is in close association with applied sciences and engineering. Hydraulics is used for the generation, control, and transmission of power by the use of pressurized liquids. Hydraulics includes concepts such as pipe flow, dam design and fluid control circuitry, turbines, hydropower and river erosion among others. Hydraulic machines help do most of the heavy hauling and lifting on construction projects.