Any good, large scale, atlas will give you this.
Rivers are coloured blue on most UK maps
yes.
The geography maps
You can find it in the map because you can't have water on maps and no heights on maps
a physical map shows mountains and rivers.
A physical map is the one that shows things like rivers, mountains and plateaus. The proper name for them however is a topographic maps.
Topographic maps.
Physical Map (cartography)
Usually rivers or canals.
So they can make maps.
Topographie
Both military staffs in the US Civil War were lacking in accurate maps that were required for battles, transportation, rivers, lakes and sea coast maps. The maps were provided and-or created by West Point engineers or by private map makers. The topology of various areas were a military necessity.