Marine Renewables  Resource Potential
Tidal energy
For an impounded water basin with a constant water level difference of H metres, the potential energy of the water stored in the basin for each tide is 4.91 H2 kJ/m2. This is the theoretical maximum upper bound estimation formula for tidal energy resources.
With the above formula and the 1999 tidal data recorded from the various tidal measuring stations, the theoretical maximum tidal energy which can be produced per day per unit area of an impounded water basin have been calculated and given below.
Tidal Resource Potential
Station

Theoretical Maximum Tidal Energy (kJ/m2)



Annual Total

Daily Mean


Shek Pik

4,782

13.10

Tsim Be Tsui

8,640

23.67

Lok On Pai

5,335

14.62

Quarry Bay

4,402

12.06

Tai Po Kau

4,859

13.31

Tai Miu Wan

3,557

9.75

Waglan Island

3,397

9.31

Average

4,996

13.7

The average tidal energy resource potential for Hong Kong is only 13.7 kJ/m2/day or 1.39 kWh/m2/yr, which is very small when compared to other renewable energy resources.
Wave energy
Using the wave data collected by the Hong Kong Observatory at Waglan Island in the year 1999, it was estimated (in the renewable energy study of EMSD) that a 10 kW installation will take up about 35m of shoreline.
