So how much do offshore reservoirs cost?
The already proven oil containment booms that have been employed in various parts of the world. It is known that these costs are in the thousands of £££ rather than millions for land based reservoirs.
Land based reservoirs need to be very strong to hold back tons of water, an off shore reservoir needs only a thin membrane to retain that fresh water. Hence land based dams cost millions of pounds to build and require large amounts of land to be purchased.
Investors are required to take this forward.