A Green and Unpleasant Land (?) Set in a Sewage Sea

Surfers Against Sewage established that, in 2020, untreated wastewater (including human faeces), was discharged on to English and Welsh beaches on circa 3000 occasions (back to the 'bad old days'?). Rather obviously, effluent discharged into UK rivers (another common occurrence) also ends up in the sea (https://www.theguardian.com/environment/2021/apr/19/sewage-island-how-britain-spews-untreated-waste-rivers-sea). Effluent is legally discharged only at times of potential flooding. Concrete holding pens for the wastewater can be created. These can store the effluent, until water levels sufficiently decline. Holding pens are not thought, however, to be an appropriate solution in many locations. In some parts of the world (e.g. Hunan in China), Sustainable Drainage Systems (SuDS) have proved to be a successful alternative. SuDS are designed so enable the environment to absorb, slow and divert the rainwater. Created wetlands, ponds and green ditch systems are constructed to perform these actions. The process is also facilitated by installing green roofs on buildings and rainwater harvesting systems. Non-absorbant surfaces can also be replaced by porous asphalt or gravel. SuDS effectively stop sewage treatment works being overwhelmed by flooding. This means there would be no need to ever discharge untreated sewage into rivers or directly into the sea. SuDS would certainly make surfing in the UK, a lot more pleasant and healthy. They also create desirable natural-looking amenities in the locations where they are built.