🚀 go-pugleaf

>further along, it can pick it up. What physical process do you imagine
>will prevent the same river, flowing at the same speed, from picking up
>the sediment that is unprotected when it would have picked up the
>protected sediment?

I don't have to imagine a process which prevents the river from doing
something; you need to define a process which causes the river to do
something.  So far you haven't succeeded.

>The problem is, the sediment that it would have picked up from the now
>protected bank will not be deposited ten feet down the river. Ten feet
>down the river you have erosion. So you protect that. Then you have to
>protect ten feet further along.

What about the sediment the river would have deposited on the protected
bank?  Wouldn't the river have just picked up that sediment again?  You
have to do a lot better than just waving your hands.