These are generically called "canals".
Canals
Rivers, lakes, canals, even sewers are bodies of water that flow downhill in a channel.
What is commonly referred to as the "Detroit River" is actually a channel connecting two of the great lakes.
The rivers and lakes of Asia.
what rivers lakes and montains
najor rivers or lakes of Nunavut
Yes, Germany has many rivers and lakes.
lakes and rivers
567 lakes and 746 rivers FACT !!!!!!!!!!!!
compare and contrast the lakes,wetland and rivers?
what are missouries main rivers,lakes,and mountains
lakes and rivers