水分平衡模型

水分平衡模型

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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 categoriesData-perspectiveGeoinformation analysis
Method-focused categoriesProcess-perspectivePhysical process calculation

Model Description

Chinese {{currentDetailLanguage}} Chinese

水分平衡模型

1)树冠拦截和蒸发:

 

 

式中Ep为月内活动的数量;ke为常数;Pt为本月总降水量;Sa为本月积雪的等融水量;Limite为每月活动的最大数量;LimitwLimits分别为冬季和夏季每月的最大活动;Intc为总的树冠拦截量;Intm为充分郁闭树冠的最大潜在拦截量;Ilag为草本的叶面积指数;Ilaw为木本植被的叶面积指数。

(2)地表水渗透部分转变成地表径流:

 

 

式中,Rs为地表径流;Sm为融雪水;Pt为直流降水量;W为当前土壤湿度;Wm为潜在土壤湿度矩阵;Ws为饱和土壤湿度;ks1为有关土层的常数;qInf为最大潜在渗透率。

(3)水分渗透到下土壤一层:

 

 

式中,WsiWfiWmi分别是饱和时的土壤湿度,土地容量和潜力矩阵;qsatiqunsati分别是土层i饱和和不饱和时的渗透率;Wi是土层i当前土壤湿度;四个常数(ks1iks2iku1iku2i)分别为每一个土层所校准。

(4)实际的蒸腾作用(Ta):

 

 

式中,Coci是生活型i的树冠蒸腾作用导通率;PET是潜在蒸腾率;Cosi是气孔的导通率;Comij是温热地带j的最大气孔导通率;Ilam是正常状况下使用的最大Ilakati是一个依赖于植物生活型的常数并把实际Ila的转换成树冠有效IlaWUEi是每一种生活型的最大水分利用效率;Dla是叶面积持续时间。

 

参考文献

Neilson R P: 预测大陆植被分布和水分平衡的模型Ecological Applications1995,5(2)

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How to Cite

《资源环境数学模型手册》 (2018). 水分平衡模型, Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/ef8a7bc8-e813-4145-8b88-4f8d3ed872b3
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Last modifier : 
Zhiyi Zhu
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 : 
Zhiyi Zhu
Last modify time : 
2020-10-31
Modify times : 
View History

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