(FR2765920-A1)      The arrangement divides a bay (A) into two or three waterways. One is used for a tideway (1) from bay shore sides A1 to A3, the other (2) from A2 to A3 has a series of basins (4-9) built in sequence. The basins are enclosed with barrages (11) extending along the tideway side and extending squarely to the tideway. A caisson (12) is mounted with a pump turbine to the barrage extending along the tideway. Basins (4,8,9) are used for ebb tide power generation, basins (5,6,7) for floor tide power generation.    In the ebb tide arrangement, the basin (4) water level is elevated to maximum level (22) at nighttime by pumping. At daytime, power is generated to produce turbine power and the water level lowers. In flood tide, the water level of the basin (5) is lowered by pumping to minimum (23) at nighttime. At daytime power is generated to produce turbine power and the water level rises. Power is generated every day at daytime for 11 to 12 hours at maximum power output using the time difference of 6.2 hours between ebb and flood tide.    ADVANTAGE -   Is free of sluices, attains maximum tidal energy, enables keeping of natural tidal range so can construct small sized power plants so maximum energy of site extracted, enables long term construction plan as each basin forms independent power plant, efficiency of pumped storage power generation output portion is more than 100 per cent.    (JP11029921-A)      The arrangement divides a bay (A) into two or three waterways. One is used for a tideway (1) from bay shore sides A1 to A3, the other (2) from A2 to A3 has a series of basins (4-9) built in sequence. The basins are enclosed with barrages (11) extending along the tideway side and extending squarely to the tideway. A caisson (12) is mounted with a pump turbine to the barrage extending along the tideway. Basins (4,8,9) are used for ebb tide power generation, basins (5,6,7) for floor tide power generation.    In the ebb tide arrangement, the basin (4) water level is elevated to maximum level (22) at nighttime by pumping. At daytime, power is generated to produce turbine power and the water level lowers. In flood tide, the water level of the basin (5) is lowered by pumping to minimum (23) at nighttime. At daytime power is generated to produce turbine power and the water level rises. Power is generated every day at daytime for 11 to 12 hours at maximum power output using the time difference of 6.2 hours between ebb and flood tide.    ADVANTAGE -   Is free of sluices, attains maximum tidal energy, enables keeping of natural tidal range so can construct small sized power plants so maximum energy of site extracted, enables long term construction plan as each basin forms independent power plant, efficiency of pumped storage power generation output portion is more than 100 per cent.    (GB2327241-B)      The arrangement divides a bay (A) into two or three waterways. One is used for a tideway (1) from bay shore sides A1 to A3, the other (2) from A2 to A3 has a series of basins (4-9) built in sequence. The basins are enclosed with barrages (11) extending along the tideway side and extending squarely to the tideway. A caisson (12) is mounted with a pump turbine to the barrage extending along the tideway. Basins (4,8,9) are used for ebb tide power generation, basins (5,6,7) for floor tide power generation.    In the ebb tide arrangement, the basin (4) water level is elevated to maximum level (22) at nighttime by pumping. At daytime, power is generated to produce turbine power and the water level lowers. In flood tide, the water level of the basin (5) is lowered by pumping to minimum (23) at nighttime. At daytime power is generated to produce turbine power and the water level rises. Power is generated every day at daytime for 11 to 12 hours at maximum power output using the time difference of 6.2 hours between ebb and flood tide.    ADVANTAGE -   Is free of sluices, attains maximum tidal energy, enables keeping of natural tidal range so can construct small sized power plants so maximum energy of site extracted, enables long term construction plan as each basin forms independent power plant, efficiency of pumped storage power generation output portion is more than 100 per cent.