Evaporation from sparse crops‐an energy combination theory

Quarterly Journal of the Royal Meteorological Society - Tập 111 Số 469 - Trang 839-855 - 1985
W. James Shuttleworth1, Jim Wallace1
1Institute of Hydrology, Wallingford, Oxon.

Tóm tắt

AbstractA one‐dimensional model is adopted to describe the energy partition of sparse crops. Theoretical development of this model yields a combination equation which describes evaporation in terms of controlling resistances associated with the plants, and with the soil or water in which they are growing. the equation provides a simple but physically plausible description of the transition between bare substrate and a closed canopy. Although the aerodynamic transfer resistances for incomplete canopies have, as yet, no experimental justification, typical values, appropriate to a specimen agricultural crop and soil, are shown to have limited sensitivity in the model. Processes which require further study if the equation is to be used to calculate evaporation throughout a crop season are also discussed.

Từ khóa


Tài liệu tham khảo

10.1016/0002-1571(74)90076-4

10.2134/agronj1970.00021962006200010022x

Denmead O. T., 1976, Vegetation and the Atmosphere, 1

10.1175/1520-0450(1967)006<0852:EFADS>2.0.CO;2

Monteith J. L., 1965, Evaporation and the environment, Symp. Soc. Expl. Biol., 19, 205

1973, Principles of Environmental Physics

10.1002/qj.49710745102

10.1007/978-94-009-8647-3

10.1007/BF00919390

10.1007/BF00123986

10.1007/BF00117922

Sinclair T. R. Allen L. H.andStewart D. W.1971‘A simulation model for crop environmental interactions and its use in improving crop productivity’. Proc. 1971 Summer Comput. Simul. Counc. La Jolla California

10.1016/0002-1571(73)90032-0

10.1007/BF00225866

10.1002/qj.49709841510

Uchijima Z., 1976, Vegetation and the Atmosphere, 33

10.1016/0002-1571(76)90022-4

10.1016/0002-1571(81)90064-9

Thông tin
Thông tin xuất bản

Quarterly Journal of the Royal Meteorological Society

Tập 111 Số 469

839-855

Thông tin tác giả