Premium
Dew: An addition to the hydrologic balance of Douglas fir
Author(s) -
Fritschen Leo J.,
Doraiswamy Paul
Publication year - 1973
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/wr009i004p00891
Subject(s) - dew , lysimeter , douglas fir , environmental science , water balance , hydrology (agriculture) , evaporation , atmospheric sciences , meteorology , forestry , geology , geography , soil science , soil water , condensation , geotechnical engineering
The hydrologic balance of a 28‐meter Douglas fir tree in a weighing lysimeter was determined for 2 clear days in May 1972. The results indicated dew accumulations of 6.4 and 10.9 liters, which represent 15 and 20% of 42.5 and 55.2 liters of evaporation from the tree. Since the dew was recorded as a weight increase, its source has to be the atmosphere. In the Pacific Northwest, conditions are favorable for dew formation during most of the summer and fall. Thus dew formation could represent a large part of the hydrologic balance of fir forests.