+++ Robert Staven [2013-06-26 15:15 +0200]:
> Short answer (from cave diving experience):
> Not much (if the water flow and passage size allows divers to swim thru)
>
> Bit longer (scientific):
> Assume a 10cm/sec flow, 1 meter diameter tunnel, 10cm wall
> roughness, 1500 meter length
> ->
I am working on a master survey of the Kingsdale System in Yorkshire,
UK. There is a substantial submerged portion to the system. Over a
rough distance of 1500m of sumped passage, what difference in water
levels could be expected between the upstream and downstream ends of
the sump?
The diving
