A Delta
Lake Huron is on the eastern side of Michigan, between Michigan and Ontario. The southern end of the lake is Port Huron/Sarnia, where Huron meets the St Claire River, and the northern end of the lake is the Mackinac Bridge (pronounced "Mackinaw") where Lake Huron meets Lake Michigan. On the East-NorthEast side of the lake it connects to the St Mary's river and Sault Ste Marie and Lake Superior.
colorado river
The Rouge River meets the ocean in Oregon.
the mouth
Oxbow lake
It is a river
estuary
It is the river bank. Or coast, if it is emptying into the ocean, like the Mississippi River.
Lake Itasca.
The marshy inlet of a river or lake is called a bayou. The name for an artificial waterway is a canal.
Mississippi River (shares its name with the state of Mississippi)