At the margins of cities are some of the things we take for granted. Unloved and often unwanted, unless they can be located ‘somewhere else’. And because these are the margins, people seem less inclined to treat them with care.
So let’s hear it for the ‘Consented Stormwater Outfall’ at Eastney.
In Portsmouth there are few ‘surface water’ sewers so the rainwater and foul water share the same pipes. Flows arriving at the water treatment site can increase from 700 litres per second during dry weather to 20,000 litres per second when it rains heavily. Four storm tanks holding a total of 40 million litres of water are positioned underground to store stormwater during heavy rain. When the rain subsides, the contents of the tanks are sent to the main works for treatment. However, during prolonged heavy rainfall and periods of flash flooding, these tanks can fill up and there can be a need to release water to avoid the sewer system becoming overwhelmed and causing flooding.
On such occasions water is released through designated outfall pipes. These are pipes that the Environment Agency has agreed that Southern Water can use during storm conditions and emergency situations, to release heavily diluted wastewater, generally 99.98% rainwater and 0.02% sewage, into the sea to prevent flooding.
More technical stuff here.
It may not be the prettiest landscape, but it has a sort of ragged glory….“There is a tide in the affairs of men.
Which, taken at the flood, leads on to fortune;
Omitted, all the voyage of their life
Is bound in shallows and in miseries…. “…On such a full sea are we now afloat,
And we must take the current when it serves,
Or lose our ventures…”
[William Shakespeare from “Julius Caesar” (Act 4, Scene 3)]