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What is a karst plain, anyway?

Chris Brown (not a caver)
Suffolk, VA

--- Trey <trey@ne*.co*> wrote:
> 
> Blue holes are tidal but can have some very twisted
> relationships to the
> tides. Caves in karst plains tend to move in one
> direction unless there is a
> temporary disruption , like the breaking of an
> aquaclude. Springs,
> especially along rivers, can reverse and siphon when
>  the level of the
> surrounding water rises. Speed of flow is definitely
> not only tidal ( moon
> pull ) , but dependent upon the hydrostatic head
> which can change locally,
> or at a great distance, but is most likely to change
> quickly locally, as in
> low tide at a resurgence into the Gulf where the
> head is coming from 50
> miles away.
> 
> -----Original Message-----
> From: Aldo P. Solari [APS]
> [mailto:aldo.solari@ho*.se*]
> Sent: Thursday, May 17, 2001 7:16 PM
> To: techdiver@aquanaut.com
> Subject: "reverse flow"
> 
> 
> Dear senior technical divers,
> 
> I  wonder  whether  anyone  could  explain  the 
> causes  of  the
> phenomenon of "reverse flow" occurring in caves.
> 
> Does  the  "reverse  flow"  occur  due  changes  in 
> atmospheric
> pressure,  tides,  coreolli  forces,  venturi
> effects through the
> cave entrance or any other mechanism/s ?
> 
> An interesting topic.
> 
> Cheers,
> 
> aldo.solari@ho*.se*
> www.ccbb.ulpgc.es/fish-ecology/solaris
> ___
> 
> 
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