Civil Engineering - Irrigation - Discussion

After construction of barrage, the water flowing through the barrage have less silt, so water picks up silt from downstream bed. This results in lowering d/s river bed to a few miles. This is known as retrogression.

Retrogression:

It is a temporary phenomenon which occurs after the construction of barrage in the river flowing through alluvial soil.

As a result of backwater effect and increase in the depth, the velocity of water decreases resulting in deposition of sedimentation load. The water flowing through the barrage have less silt, so water picks up silt from downstream bed. This results in lowering d/s river bed to a few miles. This is known as retrogression.

When dam is constructed up stream side contain more silt than dw side it is called retrogression.

Thank you @ROSH.

What is retrogression ?

The process of returning to an earlier state, typically a worse one.

Thanks @Rosh.

Thank you @Rosh.

Thanks @Rosh.

It is dictionary meaning. @Chandresh.

@Rosh.

Well said, Thanks.