backwater

backwater is a   Noun

Definition:

[1] Water turned back in its course by an obstruction, an opposing current , or the flow of the tide, as in a sewer or river channel, or across a river bar.

[2] An accumulation of water overflowing the low lands, caused by an obstruction.

[3] Water thrown back by the turning of a waterwheel, or by the paddle wheels of a steamer.

Synonyms: