土壤水分及土壤-大气界面对麦田水热传输的计算公式

土壤水分及土壤-大气界面对麦田水热传输的计算公式

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contributed at 2018-12-04

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Affiliation:  
岳天祥编著
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yue@lreis.ac.cn
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Application-focused categoriesNatural-perspectiveLand regions
Application-focused categoriesNatural-perspectiveAtmospheric regions

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土壤水分及土壤-大气界面对麦田水热传输的计算公式

(1) 土壤水分计算公式:

式中,为计算土层内的有效水分;i=1,…,I,为第i个土层深度;为第i层凋萎体积含水量;为第i层土壤深度;为第i层体积含水量,其中,为由土钻取土得到的土壤重量含水量,为土壤干容量,为水的密度。

(2) 麦田生态系统土壤-大气界面能量传输的平衡方程:

式中,为到达冠层表面上的净辐射;G为土壤热通量;,为显热通量;为潜热通量。ρ为空气密度;为空气定压比热;分别为潜热和显热通量的湍流交换系数;Te分别为空气温度和水汽压;γ干湿球湿度表方程中常数;β为波文比,

(3) 大气水势计算公式:

式中,为大气水势,为水的克分子体积;R为气体常数;T为大气绝对温度;e为实际水汽压,分比为波文比中上下两组湿球、干球温度的平均值;为饱和水汽压,

参考文献

刘苏峡,莫兴国,李俊等:土壤水分及土壤-大气界面对麦田水热传输的作用。地理研究,1999,18(1)

How to Cite

《资源环境数学模型手册》 (2018). 土壤水分及土壤-大气界面对麦田水热传输的计算公式, Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/2a0e6ecc-089d-45d0-abcb-b9c9743b277e
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zhengzhong
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Contributor

contributed at 2018-12-04

Authorship

Affiliation:  
岳天祥编著
Email:  
yue@lreis.ac.cn
Homepage:  
View
Is authorship not correct? Feedback

History

Last modifier : 
zhengzhong
Last modify time : 
2020-10-31
Modify times : 
View History

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