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Energy budget measurements over three cover types in eastern Arizona
Author(s) -
Thompson J. R.
Publication year - 1974
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/wr010i005p01045
Subject(s) - evapotranspiration , watershed , cover (algebra) , hydrology (agriculture) , energy budget , environmental science , bowen ratio , growing season , atmospheric sciences , forestry , physical geography , geography , ecology , geology , biology , computer science , mechanical engineering , geotechnical engineering , machine learning , engineering
Three years of continuous records of net radiation R n were taken over a pine forest, a cienega, and a clear‐cut opening. Seasonal patterns of the portion of R n going into evapotranspiration E T were determined for these cover types by energy budget measurements in the Bowen ratio equation. By using the average daily R n over two summer periods (May to June and July to September) and the mean ratios of E T to R n , E T for the three cover types for the growing season was estimated at 19.4 in. for the forest, 15.3 in. for the clear‐cut opening and 13.2 in. for the cienega. Weighting these amounts by the extent of the type resulted in a watershed average E T of 18.4 in. for the growing season.