Guesswork consigned to the scrapheap

摘要

The change in weather patterns resulting in floods and droughts has highlighted an area where incorrect calculations can cause pollution, operational problems and a rather unpleasant smell! What goes down drains, and what the specifications should be for the treatment plants at the end of the drains, has in many cases been a matter for guesswork. No matter how educated those guesses are, that can still lead to failure of the system.