Author(s): H. P. Hu; N. Tamai; Y. Kawahara
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Keywords: No Keywords
Abstract: The estimation of evapotranspiration from a vegetated landsurface has been increasingly drawn attention in recent decades since the evapotranspiration is a crucial process concerning with many natural phenomena, including water circulation, climate evolution, seed generating, plant growth, weather prediction and so on. In order to achieve this estimation it is essential to determine the fluxes of momentum, moisture, and heat at the land-atmosphere interface which is a boundary layer, containing vegetation and adjacent soil and air, saying Soil-Plant-Atmo sphere Continuum (SPAC). For their own purposes many researchers have been involved in the study of exchange of energy and mass in the SPAC, but most of them pay more attention to independent submodels of soil, vegetation or atmosphere respectively by assuming remaining parts are in ideal or simple conditions. In recent years it is found that the coupled full-interacting system of the SPAC should be taken into consideration although the isolated and idealized analyses of the three components of the SPAC are also important and should be developed prior to the development of the theory of their coupled behavior (Milly, 1991).
Year: 1995