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[Calculation of parameters in forest evapotranspiration model]
1Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China. Anzhiwang@163.net
Ying Yong Sheng Tai Xue Bao = the Journal of Applied Ecology
|March 23, 2004
Summary
This study developed a model to accurately estimate forest evapotranspiration using aerodynamic and energy balance principles. The model was validated using data from a Korean pine forest, improving water resource management and ecosystem understanding.
Area of Science:
- Forest ecology
- Hydrology
- Meteorology
Context:
- Forest evapotranspiration is crucial for water and energy balance.
- Accurate simulation is vital for forest hydrology and meteorology.
- It forms the basis for water resource and ecosystem management.
Purpose:
- To construct a mechanism model for estimating forest evapotranspiration.
- To apply aerodynamic principles and energy balance equations.
- To use data from a Korean pine forest on Changbai Mountain as a case study.
Summary:
- A mechanism model for forest evapotranspiration was developed based on aerodynamic principles and energy balance.
- Data from Routine Meteorological Measurement System and Open-Path Eddy Covariance Measurement System were utilized.
- Key parameters like displacement height (d), and stability functions (phi m, phi h) were determined for the broadleaved Korean pine forest.
Impact:
- The study determined a displacement height of 17.8 m, close to the mean canopy height.
- Functions for momentum (phi m) and heat (phi h) stability were established in relation to the gradient Richardson number (Ri).
- This research provides a theoretical basis for improved water resource management and forest ecosystem utilization.