The basin is filled with water through the sluice gates during the flood tide. At high
tide, the sluice gates are closed, trapping the water in the basin. At this point extra water can be pumped
into the basin at periods of low demand, typically at night when electricity is cheap. The turbine gates
are kept closed until the tide has ebbed sufficiently to develop a substantial hydrostatic head across the
barrage [11]. The water is let flow out through low-head turbines, generating electricity for several
hours until the hydrostatic head has dropped to the minimum level at which the turbines can operate efficiently