Evaporimetry in the Canal Zone. Part II. Comparison of Various Types of Evaporimeters on an Hourly Basis
Special rept. 1968-1969
ARMY TROPIC TEST CENTER APO MIAMI 34004
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The United States Army Tropic Test Center conducted a project in the Canal Zone entitled Environmental Data Base for Regional Studies in the Humid Tropics during the years 1965 through 1969. Evaporation was one of the parameters under investigation. This report discusses instrumentation available for measuring evaporation and highlights serious deficiencies encountered. Measurements using the Standard Pan and Wild, Livingstone, and Piche evaporators were compared and discrepancies studied. Evaporation loss was found to be greatly influenced by differences in measuring instruments used-location, elevation, size of blotting paper, sheltering, and amount of radiation. It was concluded that different types of evaporimeters produce different measurements, and none has been adequately related to natural evaporation.