Re: [VFB] turbidity

[Jimmy D. Moore]

Turbidity refers to the amount of suspended particles of soil, etc. in the water, i.e. the higher the turbidity, the muddier the water.  Example:  Take a jar and put a couple tablespoons of  loose dirt in it and then fill with water and shake.  It'll cloud up.  Let it sit awhile and the dirt will sink to the bottom leaving the water once again clear.

JIMMY  D

Mike Thayer wrote:

On the subject or turbidity, what is it, and why does it matter?

Mike


-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Mark Klemick
Sent: Tuesday, December 23, 2003 3:18 PM
To: [EMAIL PROTECTED]
Subject: Re: [VFB] turbidity



This correlation can be roughly approximated with a turbidity tube.  It's
not an instrumented approach like the nephelometer, but if you just want a
rough order of magnitude of the logarithmic scale, it'll do.  

Check out:
http://www.waterwatch.org.au/library/module-4/turbidity.html#3
for info on how it relates to the instruments and secchi disks.  

Then look at:
http://clean-water.uwex.edu/wav/monitoring/turbidity/tubedirections.htm
for the rough scale of distance vs. visibility.  


Be cool, don't drool...


Mark


--- Don Johnson <[EMAIL PROTECTED]> wrote:
  

Anyone on the list know of a reference relating
nephelometric turbidity units to distance of
visibility in inches? 
    

=====
Mark Klemick            ! GoFishGo !          [EMAIL PROTECTED]

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-- 
JIMMY D. MOORE

Outdoor Humor Writer. Author of "MOON HOLLER MISFITS" Member Texas Outdoor Writers Association
 FFF,VFB, FFW, HCFF, Texas Fish & Game, Sporting Tales,Scout Exec. BSA-Ret.VP Chapter Affairs GRTU,
Owner/Webmaster - Worldwide Flyfishing Info. http://www.BIGTROUTMAN.homestead.com/MainPage.html 

"Being able to read trout streams is just as valuable to a 
fly fisherman as the ability to read a defense is to a Quarterback."
    
Jimmy D. Moore