| Establishing soil water dynamic model for typical steppe based on water balance principle |
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| DOI：10.7606/j.issn.1000-7601.2011.05.36 |
| Key Words: soil water dynanic model typical steppe water balance principle SPAC |
| Author Name | Affiliation | | HOU Qiong | Inner Mongolia Meteorological Institute, Huhhot 010015, China | | WANG Yingshun | Xilinhot National Climate Observatory, Xilinhot, Inner Mongolia 026000, China | | YANG Zelong | Inner Mongolia Meteorological Institute, Huhhot 010015, China | | SHI Guihua | Xilinhot National Climate Observatory, Xilinhot, Inner Mongolia 026000, China |
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| Abstract: |
| Establishing model of water balance dynamic is a main research method and content in the study of water cycle of grassland ecosystem. By using data of meteorological observation and field experiment of water at Xilinhot Climate Observatory in 2008～2009, model of water balance of 0～100 cm soil layer was set up with water balance equation of farmland and SPAC principle. The method to calculate the parameters of initial soil water storage, actual evapotranspiration, infiltration capacity, and vegetation interception were put forward through the research, and the rules for root depth identification was obtained, too. It was showed that the model was good at soil water simulation in the test (the average relative error was 8.2%; the fluctuation range was at 0.3％～23%; the significance level of T-test was less than 0.05) with data of actual observation in 2008～2009. Based on this we conclude that the model was an approptiate measure for monitoring soil water changes and for forecasting grassland drought in steppe zone. |
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