Fog drip from artificial leaves in a fog wind tunnel

The effect of fog intensity and leaf shape On water storage on leaves was studied by using a simple fog wind tunnel and leaves of aluminum and plastic. Test equipment was designed to allow quantification of the chosen variables rather than to duplicate natural conditions. Two intensities of fog were produced, and drip was measured from leaves of five different shapes. Fog intensity effects tended to obscure weaker leaf shape effects in the tests. Drip measurements were reasonably close to values predicted by calculation using an exponential equation based on fog flow and leaf storage capacity. Results indicate that the method of estimating fog drip could be useful when appropriate climatic and vegetative characteristics are known.