The energetics approach to bed load and suspended load transport is a more integrated approach to bed load and suspended load transport and was first developed by Bagnold (1963, 1966) for rivers. The underlying idea is that a certain amount of energy is needed to keep the bed load moving and the suspended load at a certain height above the bed. The sediment transport formulation of Bagnold is therefore proportional to the rate of energy dissipation of the stream. It also includes an efficiency factor for bed load and suspended load that determines how efficiently the energy is used for the sediment transport. Besides, the effect of downward transport by gravity is included. In this section the energetics transport model is discussed in general terms. In Sect. 7.5, we apply the model to unravel the various contributions to cross-shore sediment transport as well as treat model applications to obtain equilibrium beach profiles.