Civil Engineering - Irrigation - Discussion

Classification on the basis of function Groynes serve.

Deflecting Groynes : A groyne perpendicular to the bank of the river.

Repelling Groynes : A groyne pointing upstream of river has the property of repelling the flow away from itself are called repelling groynes and these create scours which are formed due to vertical eddies. The scours formed are away from bank and near the head of groynes.

Attracting Groynes: A groyne pointing downstream is known as attracting groyne and these have property of attracting flow towards themselves, in this case also scours are created but are near the bank of the river.

My question is that where these are provided. Repelling groynes are provided on downstream? and attracting groynes on upstream?

Please explain the meaning and functions of groyne.

Attracting Groynes: A groyne pointing downstream is known as attracting groyne and these have property of attracting flow towards themselves, in this case also scours are created but are near the bank of the river.

Please, clarify groyne position weather upstream or downstream.

Attractive groyne position is downstream.

Water always flow from upstream to downstream because of gravitational force and that's why upstream is repeal and downstream is attractive so attractive groins are on the downward side and repealed is on upstream side.

Groynes are generally provided for prevention of banks of rivers and 3 category form in provide to that.

Perpendicular to river, inclined in towards upstream, inclined in towards downstream.

Well said Thanks @Jinish.

Attracting groynes inclined downstream.
Repellant groynes inclined upstream.
Deflecting groynes, perpendicular to the bank.
Hockey groynes curved downstream in the shape of a hockey stick.
T shape groynes, special groynes with head in T shape.