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 == Formation == 

 On 15 & 16 May 2011 some text and an in-line citation were removed from Meander#Formation and replaced by the following new text. (See diff.): 

 :In order for a flow to have a curved path there must be a centripetal force inward that is present (this is similar to spinning a bucket on a string, but here we do not have solid body rotation ie. a spinning record).  The force presents itself as a pressure gradient outwards (larger pressure on the outside of the bend then inside) or from a change in elevation at the free surface (larger elevation on the outside of the bend).  At the free surface of the river the pressure must be constant, equal to atmospheric pressure, so the elevation must change to maintain the curved flow.  In the middle (in the vertical) of the river a pressure gradient is present to maintain the curved flow.  At the floor of the river, the no slip condition requires no velocity.  This sets up a situation that has lower velocity at the floor which is not enough to overcome the pressure gradient and a secondary cross flow develops (into the bend at the floor).  The secondary flow into the bend at the floor due to the pressure gradient must eventually go up due to conservation of mass and the flow is outward above the floor.  This entire situation is very similar to the Tea leaf paradox. This secondary flow caries sediment from the outside of the bend to the inside making the river more meandering.Cite CallanderCite Falcon 
    
 :It is a misconception that the flow at the outside is faster then the inside (which would be true for solid body rotation which we don't have here), it is actually the opposite.  We consider the flow to be irrotational for the most part here, which requires the flow outside to be slower than the flow inside (otherwise the flow would not be irrotational.)Cite Lewalle 

 I have now restored the original text as follows. (See diff.): 
 :Flow of a fluid around a bend is vortex flow in order to conserve angular momentum. The speed of flow on the outside of the bend is fastest, and on the inside of the bend is slowest.Cite Hickin The water surface is also super-elevated towards the outside of the bend, so on the floor of the channel the water pressure is greater on the outside of the bend than on the inside of the bend. This pressure gradient drives a cross-current towards the inside of the bend.Cite Hickin 

 The end result is that some of the ideas are now duplicated.  There is a need to rationalise what is there by removing any duplication, unsourced statements and unencyclopedic language. 

 My thoughts are that the new text is a bit too like a textbook for teenagers and not enough like an encyclopedia.  Any other thoughts?  '''' "