An early dutch map of the UK shows seven former islands on the Clyde below Govan which have been lost when the river was deepened, and possibly at earlier dates.
They were named, Water Inch, Whyte Inch, Buck Inch, King's Inch, Ron, Newshot and Bad Inch.
We still have the name Whiteinch and I suppose, Inchinnen refers to one also .
I do know that the River was trained into a narrower channel in order to provide deep water access to Glasgow, but it is possible that the narrowing had been carried out piecemeal over several centuries.
Lately I have been researching how this had been done on the Thames, and I found that piled river works had been built progressively out into the river over centuries, often deliberately drawing up old hulks at high tide, then filling them with rubbish to form temporary wharfage. I suspect this was done by individual landowners and only possible to be carried out comprehensively when there was a common river authority- Clyde Navigation Trust?
The final result is that both the depth of the river was doubled, and the tidal range also increased markedly.
(I will try and attach the old plan but have trouble with attachments on this site)