Where are the rivers and streams in Bristol?

Yesterday I wanted to find out more about the Cranbrook, a little stream that’s only above ground for a couple of hundred metres in Redland, before I blogged about exploring it.  I couldn’t find out much about it, though in a comment on flickr, iyers told me it once flooded the Arches area of Gloucester Road.

But in failing to find the information I wanted, I found something better:  The Big Blue Map of Bristol from Bristol City Council, with the waters marked above and below ground as rivers (though I assume they aren’t showing the ones, like the Cranbrook, might join the sewer system. I love this map, it’s so useful!  You know I’m going to be pouring over this, with my OS maps next to me, and planning more walks…