11.   The floodwater stirs up mud and clay from the river bed.

12.   ...a dried-up river bed.

13.   An ancient bus stopped by a dry river bed and a party of famous actors and actresses got off.

14.   He looked down at the river bed below him.

15.   Owen and Mahmoud were left on the river bed.

16.   But the discovery of the remains of hundreds, even thousands, of the huge animals in the river bed of the Thames has changed all that.

17.   And it alleges that in some cases traffic is being severely disrupted on the busy road after cars have been covered in slime dragged up from the river bed.

18.   The river is to be diverted along the man-made channel later this year to allow for the construction of a barrage on the natural river bed.

19.   And now Texas has its own off-road controversy, this time involving its river beds.

20.   And rocks, harvested from river beds and caves, shaped by tides and rain, embodied this dynamic in miniature.