Estimating Evaporation: A Technique Adaptable to Remote Sensing

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Science  19 Sep 1975:
Vol. 189, Issue 4207, pp. 991-992
DOI: 10.1126/science.189.4207.991


A procedure is presented for calculating 24-hour totals of evaporation from wet and drying soils. Its application requires a knowledge of the daily solar radiation and the maximum and minimum air temperatures (standard Weather Service measurements), moist surface albedo (readily estimated or obtainable from a one-time measurement), and maximum and minimum surface temperatures (obtainable from surface or airborne sensors). Tests of the technique on a bare field of Avondale loam at Phoenix, Arizona, have shown it to be independent of season.