Abstraction involves taking water, via pipe, from the sea, using it for an industrial process and then returning it to the sea. Most abstracted water is used for cooling. There is a limit placed on the temperature at which water can be returned. The majority of coastal water abstractions, by volume, are for power stations.
SEPA regulates the abstraction of water from the marine environment.
Updated graphs (as found in Scotland’s Marine Atlas) can be accessed in the ‘Data Sources’ tab at the bottom of the page.