土壤热惯量模式

土壤热惯量模式

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contributed at 2018-12-04

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Affiliation:  
岳天祥编著
Email:  
yue@lreis.ac.cn
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Method-focused categoriesProcess-perspectivePhysical process calculation

Model Description

Chinese {{currentDetailLanguage}} Chinese

土壤热惯量模式

(1) 热通量计算公式:

式中,G为热通量;为温度的第k谐波分量;为第k谐波的输入土壤阻抗,为在d深度的土壤阻力,为土壤特征阻力,为传播常数。

(2) 热惯量计算公式:

式中,P为土壤热惯量;为地表热量平衡的分量变化过程中第i时刻的下标;为地表净辐射通量;H为地表乱流通量;LE为地表潜热通量;G是土壤热通量;分别为土壤、水、空气的体积;分别为土壤、水、空气的热惯量;为天空温度,σs分别为某种土壤的凋萎系数及田间持水量。

在一幅影像图中第j点热惯量值的计算公式:

式中,为第j点的热惯量值。

(3) 温度计算公式:

式中,为表面温度;为空气阻力;d为空气饱和差;为空气温度;v为干湿表常数;Δ为对温度对饱和水汽压的斜率;ρ为空气密度;为定压比热。

(4) 空气密度计算公式:

式中,为地表平均反射率;为地表日最高最低温度;分别为辐射散热系数、显热散热项系数和潜热散热项系数;k为与相协调的累加系数。

(5) 空气阻力计算公式:

式中,为粗糙度;为地表温度;z为观测u的高度;为空气温度;u为风速;n为经验常数。

(6) 显热通量比计算公式:

式中,

参考文献

张仁华:改进的热惯量模式及遥感土壤水分。地理研究,19909(2)

 

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How to Cite

《资源环境数学模型手册》 (2018). 土壤热惯量模式, Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/865fd280-408d-4c2b-a346-e6af99ad71b3
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Last modifier : 
zhengzhong
Last modify time : 
2020-10-31
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Contributor(s)

initial contribute: 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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