[Calculation of parameters in forest evapotranspiration model].
Forest evapotranspiration is an important component not only in water balance, but also in energy balance. It is a great demand for the development of forest hydrology and forest meteorology to simulate the forest evapotranspiration accurately, which is also a theoretical basis for the management and utilization of water resources and forest ecosystem. Taking the broadleaved Korean pine forest on Changbai Mountain as an example, this paper constructed a mechanism model for estimating forest evapotranspiration, based on the aerodynamic principle and energy balance equation. Using the data measured by the Routine Meteorological Measurement System and Open-Path Eddy Covariance Measurement System mounted on the tower in the broadleaved Korean pine forest, the parameters displacement height d, stability functions for momentum phi m, and stability functions for heat phi h were ascertained. The displacement height of the study site was equal to 17.8 m, near to the mean canopy height, and the functions of phi m and phi h changing with gradient Richarson number R i were constructed.
Wang
Anzhi
A
Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China. Anzhiwang@163.net
Pei
Tiefan
T
D008433:Mathematics; D008962:Models, Theoretical; D018526:Plant Transpiration / Q000502:physiology*; D014197:Trees / Q000502:physiology*