| 脉冲降雨—蒸发对土壤湿度影响的动力机制分析 |
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| 引用本文： | 刘春,张春辉,李秀梅.脉冲降雨—蒸发对土壤湿度影响的动力机制分析[J].四川气象,2011(2):59-62. |
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| 作者姓名： | 刘春 张春辉 李秀梅 |
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| 作者单位： | 四川省内江市气象局;四川省眉山市气象局; |
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| 摘 要： | 土壤湿度直接作用于植被的呼吸、蒸腾和各种化学反应,是生态气象学的重要的环境因素。降雨和蒸发作为土壤湿度的两个重要扰动因子,对其进行定性的理论分析及定量的数值分析具有重要意义,尤其在半干旱和干旱地区。蒸发对土壤湿度具有持续的耗散作用,可以视为连续的,而降雨作为湿度补充作用具有脉冲效应。为阐释降雨和蒸发对土壤湿度的影响,该文通过建立脉冲降雨—蒸发对土壤湿度响应模型,并对其进行定性分析,得到此微分方程系统的周期解的充分条件。在此基础上,通过Forcal对方程参数拟合,并以Maple作为数值分析工具,对此系统进行数值模拟。
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| 关 键 词： | 微分方程系统 脉冲 Forcal Maple |
Analysis of the Dynamics Mechanism for Discontinuous Rain and Evaporation Affecting the Soil Moisture |
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| LIU Chun,ZHANG Chunhui,LI Xiumei.Analysis of the Dynamics Mechanism for Discontinuous Rain and Evaporation Affecting the Soil Moisture[J].Journal of Sichuan Meteorology,2011(2):59-62. |
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| Authors: | LIU Chun ZHANG Chunhui LI Xiumei |
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| Institution: | LIU Chun1,ZHANG Chunhui1,LI Xiumei2(1.Neijiang Meteorological Bureau,Neijiang,641000,2.Meishan Meteorological Bureau,Meishan,620020) |
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| Abstract: | Soil moisture directly affects on the vegetation respiration,transpiration,and various chemical reactions,it is an important eco-environmental factor in bionomic meteorology.Rainfall and evaporation are two important turbulent factors affecting soil moisture,qualitative and quantitative theoretical research on them with numerical analysis is important,particularly in semi-arid and arid regions.Evaporation has a constant dissipation effect on soil moisture,it can be regarded as continuous,while discontinuous... |
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| Keywords: | dynamics mechanism discontinuous rain evaporation soil humidity |
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