区域玉米水分状况估计模型

区域玉米水分状况估计模型

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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-perspectiveChemical process calculation
Method-focused categoriesProcess-perspectiveBiological process calculation

Model Description

Chinese {{currentDetailLanguage}} Chinese

区域玉米水分状况估计模型

 

(1)    对大的空间尺度提出了一个思想,即日蒸散量与日累积净辐射日中值之间存在联系:

 

 

式中,是地表温度;是大气温度;是校正常数。

 

每日的值对天的累积为:

 

 

(2)    对长时段(如一个月或更长),可得到下面的式子:

 

 

在这样的时间尺度上,我们知道区域的与局部的可能蒸发量存在如下关系:

 

 

式中,是潮湿条件下的参考,其可近似表示为在自由对流条件下的PriestleyTaylor方程:是饱和水蒸气压曲线的斜率,是湿度计常数,Priestley-Taylor系数;是净辐射;是参数。

 

(3)    归一化日胁迫度:

 

 

(4)    在农业气象或天气大尺度模型中衡量水分胁迫状况的简单方法:

 

 

参考文献:

SeguinBLagouarde J PSavane M:从气象卫星的热红外数据估计区域玉米水分情况。Remote Sensing of Environment1991,35

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How to Cite

《资源环境数学模型手册》 (2018). 区域玉米水分状况估计模型, Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/a748c29a-dc8b-404f-b81f-4b43d8d00710
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Last modifier : 
Mingyuan Li
Last modify time : 
2020-12-21
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Contributor(s)

Initial contribute: 2018-12-04

Co-contributor(s)

Authorship

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

History

Last modifier : 
Mingyuan Li
Last modify time : 
2020-12-21
Modify times : 
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