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I don't have any math to back me up but from experience -- you'll loose
about two inches per week -- this is relative to amount of sun, wind -- and
of coarse -- rain. (remarkably, relative humidity has little effect)

-----Original Message-----
From: Informal Science Education Network
[mailto:[log in to unmask]]On Behalf Of Kay Ziff
Sent: Friday, November 21, 2003 3:16 PM
To: [log in to unmask]
Subject: splash


ISEN-ASTC-L is a service of the Association of Science-Technology Centers
Incorporated, a worldwide network of science museums and related
institutions.
****************************************************************************
*

Have any of you needed to calculate water loss due to evaporation and/or
splashing on an outdoor water feature? Can you suggest a way to estimate
it?

The specific details are that we're planning to have about 200 sf of water
surface on a recirculating flow. Visitors will have access to it, but we
won't offer any buckets, scoops, or other obvious invitiations to pour
water on the ground.

thanks,

  Kay Ziff
  Exhibit Developer

  Bay Area Discovery Museum
  557 McReynolds Road
  Sausalito, Ca 94965
  Phone:  415/339-3922

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