What was backwater?

Answer 1

Backwater/Afflux the effect of obstructions within a flow, such a bridge piers. This obstruction causes an increase in the depth of water on the downstream side of the obstruction. Due to the expression:

Q = A1V1= A2V2

where: Q is flowrate m3/s

A = cross-section area of flow channel/river

V = Velocity

1 = Point in channel before piers (should be subscript)

2 = Point in channel between piers (should be subscript)

Flowrate is assumed to be constant and velocity assumed constant due to high volume and momentum. If they are assumed constant then the two volumes A1 and A2 must be equal. If the area between piers reduces (ie Channel width reduces due to obstructions) then for continuity of the above equation the depth must increase.

Backwater length also refers the distance from the obstruction (eg: bridge piers) to the point where pier induced disturbances return to normal flow conditions.

I must also state that backwater can refer to lagoons and creeks and stuff.

Answer 2

sleeping town where nothin happens and that has a feeling that time itself has stopped