Question

Give reason:A bubble arising from the base of the river becomes larger till coming to the surface of river

Answer 1

If the approach were to be put into practice, it would involve installing a perforated steel tube on the bed of a river bend near the outer bank and pumping pressurized air into it. In still water, these bubbles would generate a circulation that looks like a squashed circle that points away from the tube on either side, about three times as wide as the water is deep. In a river, the current would stretch it into spiral along the course of the river bend. The researchers consider the circulation to be strong enough to counteract sediment deposition in rivers with slow moving water such as the Rhine.