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IO IS 20 25 x><br />

Air temp., OC<br />

To use this chart:<br />

Enter with air<br />

temperature,<br />

move up to rel-<br />

ative humidity.<br />

Move fight to<br />

concrete<br />

tempzcature.<br />

Move down to<br />

wind velocity.<br />

Move ief;: read<br />

approx. rate of<br />

evaporation.<br />

FHWA TECfiNICAL ADVIS0RY.T 5G80.17<br />

July 14, 1994<br />

ATTACHMENT 5<br />

NOMOGRAPH USED TO<br />

DETERMINE EVAPORATION RATE<br />

35<br />

-3<br />

.- E<br />

5<br />

8<br />

22<br />

Z<br />

u<br />

B I<br />

3.10.43

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