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The Prediction of Evaporation, Drainage, and Soil Water Storage for a Bare Soil
Author(s) -
Black T. A.,
Gardner W. R.,
Thurtell G. W.
Publication year - 1969
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1969.03615995003300050013x
Subject(s) - lysimeter , drainage , environmental science , evaporation , hydraulic conductivity , hydrology (agriculture) , water storage , soil science , soil water , thermal diffusivity , water content , pedotransfer function , geology , geotechnical engineering , geomorphology , meteorology , ecology , physics , quantum mechanics , inlet , biology
Evaporation, drainage, and changes in storage for a bare Plainfield sand were measured with a lysimeter during June, July, and August 1967, under natural rainfall conditions. Cumulative evaporation at any stage was proportional to the square root of time following each heavy rainfall. The drainage rate was found to be an exponential function of water storage. Both relations can be predicted from flow theory with knowledge of soil capillary conductivity, diffusivity, and moisture retention characteristics. Using these two relations and daily rainfall data, the water storage in the top 150 cm was predicted over the season to within 0.3 cm.