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A simple method for determining the evaporation from shallow lakes and ponds
Author(s) -
Stewart Robert B.,
Rouse Wayne R.
Publication year - 1976
Publication title -
water resources research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.863
H-Index - 217
eISSN - 1944-7973
pISSN - 0043-1397
DOI - 10.1029/wr012i004p00623
Subject(s) - evaporation , bay , environmental science , potential evaporation , simple (philosophy) , atmospheric sciences , radiation , energy budget , hydrology (agriculture) , meteorology , geology , thermodynamics , physics , oceanography , geotechnical engineering , philosophy , epistemology , quantum mechanics
This study examines the summertime evaporation from a shallow lake in the Hudson Bay lowlands evaluated by the energy budget (Bowen ratio) and equilibrium model approaches. Energy budget calculations reveal that on the average, 55% of the daily net radiation is utilized in the evaporative process over the lake. Half‐hourly and daily values of evaporation were approximated closely by the Priestley and Taylor (1972) model, where the ratio of actual to equilibrium evaporation equals 1.26. A simple model, expressed in terms of incoming solar radiation and screen height air temperature, is developed from the comparison of actual to equilibrium evaporation. Tests of the model at a different location indicate that the actual evaporation can be determined within 10% over periods of 2 weeks.