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Sensitivity of mass transfer‐based evaporation equations to errors in daily and monthly input data
Author(s) -
SINGH V. P.,
XU C.Y.
Publication year - 1997
Publication title -
hydrological processes
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.222
H-Index - 161
eISSN - 1099-1085
pISSN - 0885-6087
DOI - 10.1002/(sici)1099-1085(199709)11:11<1465::aid-hyp452>3.0.co;2-x
Subject(s) - evaporation , magnitude (astronomy) , environmental science , wind speed , vapor pressure , sensitivity (control systems) , meteorology , atmospheric sciences , systematic error , thermodynamics , statistics , mathematics , geology , physics , astronomy , electronic engineering , engineering
The influence of data errors on the performance of mass transfer‐based evaporation equations was investigated for both monthly and daily data from a climatological station in the State of Vaud in Switzerland. Evaporation estimates were found to be particularly sensitive to vapour pressure gradient, less sensitive to wind speed and most insensitive to temperature. A quantitative analysis showed that: (1) systematic errors in vapour pressure data influenced evaporation estimates inversely to more or less the same magnitude for both monthly and daily cases; (2) systematic errors in wind speed and temperature data influenced evaporation estimates inversely to the magnitude of about a half and a quarter of the magnitude of the influence of vapour pressure errors, respectively; and (3) evaporation estimates were much more sensitive to random errors in the case of monthly data than daily data. © 1997 John Wiley & Sons, Ltd.