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Simple computational procedure whereby average daily potential evapotranspiration is represented as proportional to product of day-time hours squared and to saturated water vapor concentration at mean temperature; day time factor depends on consideration of disparity between net radiation and temperature, and fact that transpiration is restricted during darkness since leaf stomata are closed; comparison with C.W.Thornthwaite's method and other methods. (31 refs.)
W. Russell Hamon (Mon,) studied this question.