Upvote:1
Trier is one example of a city which for a long time used the old Roman waste water system (ie sewer.) Trier is built at a slope with a fairly stable water resource upslope. That water was used to continuosly flush the sewer piping.
Upvote:4
you could take the German town Freiburg as an inspiration. They had small canals on the sides of the streets in which they poured the grey water. they also used the water in them to stack fires.
Sources:
Upvote:7
You call it waste, they call it raw materials.
Depending on the era, human and certainly animal feces were fertilizer. They would be collected and carried to the fields. Similar for some organic wastes. Urine would be used by some crafts, too. Rags get collected by papermakers.
There were some sewers, just not so big.
The thing about sewers in games is that they're big enough to fight a duel, not that they exist. Think of them as tunnels barely big enough for a single person to move.
https://www.thescottishsun.co.uk/tech/4501395/mystery-tunnel-abbey-drain-paisley-abbey-drain-scottish/
Open gutters.
Not as nice and clean as an enclosed sewer, but they work after a fashion.