[Tagging] Definition of lake/pond as applied to stream/plunge pools

[Kevin Kenny]

On Thu, Dec 24, 2020 at 10:16 AM Volker Schmidt <voschix at gmail.com> wrote:

> Is the pond downstream from a watermill also a stream_pond?
>

On Thu, Dec 24, 2020 at 1:57 PM Joseph Eisenberg <joseph.eisenberg at gmail.com>
wrote:

> I believe most traditional watermills are supplied by a short canal or
> ditch, so the waterway and the pond are both artificial, no?  In that case
> I would not use water=stream_pool since the examples are pools below small
> waterfalls on natural streams.
>

The mill pond is certainly an artificial pond, at least if the water level
has been raised with a weir (as it usually is).

The leat or flume, and the tail race are both usually artificial
excavations, or artificial elevated conduits.

Often, the erosion from the tail race will have sculpted a pool downstream
of the mill, That's a natural process occurring as a side effect of the
artificial stream modifications.  Whether to call it man made is up to you.

The Roman mills described by Vitruvius had undershot wheels that were
placed 'run of the river' in a fast-moving current.  Those didn't require
an artificial leat.

(Homework: Compare and contrast: penstock, head race, leat, lade, midrace,
tail race, goit, flume. The millwrights consider these specific technical
terms. I don't know enough about that technology. I knoe 'penstock' and
'tailrace' because they are terms still used with steam turbines. On steam
turbines, the turbine blades are called 'buckets' and the rotor is called
the 'wheel'.  Old terminology dies hard!)
-- 
73 de ke9tv/2, Kevin
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