[Tagging] Lake or Pond

[Warin]

On 21/07/18 09:23, Graeme Fitzpatrick wrote:
> On 21 July 2018 at 04:59, Michael Patrick<geodesy99 at gmail.com 
> <mailto:geodesy99 at gmail.com>>wrote:
>
>
>       * Does light reach the bottom of the deepest point of the water
>         body?
>       * Does the water body only get small waves (i.e., smaller than
>         1ft/30cm in height)?
>       * Is the water body relatively uniform in temperature?
>
>     If these questions can be answered with a “yes,” the water body is
>     likely a pond and not a lake.^1
>
>     Other national technical typologies do include a lower area
>     requirement ranging from .5 hectares ( 'two NFL football fields'
>     for USA residents ) to 2 hectares, and other various factors like
>     inflow/outflow, relation to the water table, sediment suspension, etc.
>
>
>
> On 21 July 2018 at 05:20, Dave Swarthout <daveswarthout at gmail.com 
> <mailto:daveswarthout at gmail.com>> wrote:
>
>     My criteria for deciding between lake and pond are therefore
>     mostly based on size. Sometimes a lake-sized water body is
>     obviously very shallow and so I tag it as a pond.
>
> Being an awkward Aussie again :-)
>
> Lake Eyre, https://en.wikipedia.org/wiki/Lake_Eyre, when full, has a 
> surface area of "9,500 km^2  (3,668 sq mi)" but has only filled a 
> handful of times in the last ~150 years. Even when full, the maximum 
> water depth in the deepest spot is only 6 m's, with most being <3 m's, 
> & the water is virtually transparent, so that the lake bottom can 
> still be seen from the air.
>
> So this makes it only a pond? (& a intermittent one at that! :-))

Ephemeral. :)

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