| 摘要 |
A method of providing mega litre reservoirs in a city or near it for supply of water to purification works and/or flood control, which method includes excavating a low grade ore, constructing a water containing floor and walls which are structurally supported by backfill to reduce civil engineering design demands, providing in the reservoir facilities for vehicle parking, shelter against fires and other disasters, means of detecting water level changes and adapting vehicle parking and shelter facilities accordingly and amortising costs against income from the ore, water sales, vehicle parking to make the method economically viable.
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