7.2 Calibrating Sprinkler systems

Design specifications for the sprinkler system may be used to estimate liquid application rates.

An alternative method is to place straight-sided catch cans at various locations under the sprinkler system.
Measure the depth of liquid in inches accumulated in the cans over a period of time (e.g., 1 hour).

Calculate the average depth of liquid in the cans and divide by the time interval to determine application rates in inches per hour.

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