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RE: Re: Re: Re: Re: Re: Yellow River: Facts on File

Michael Perelman:
>
> You may know about this than I do, but the current would bring the silt
> down to the sea over time.  If it just remained at the bottom of the
> river, there would be no problem.
>

Surely the whole problem is that when waterways silt up they become
unnavigable and irrigation systems fail; it also leads to salinisation, and
I'm wondering why this isn't the problem, seemingly, in China that it was
for instance in Persia and other ancient hydraulic societies.

Mark Jones
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