降雨入渗和坡地产流模型

降雨入渗和坡地产流模型

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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-perspectivePhysical process calculation

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降雨入渗和坡地产流模型

 

(1)入渗计算与分析

1)非饱和土壤水分运动模型:

 

 式中,θ为土壤含水量;t为时间;z为垂向坐标;k为水饱和导水率;D为扩散率。

2)累积入渗量I(t)模型:

 

式中,i(t)为入渗速率;s为吸渗率;A为稳定入渗率;t为时间。

(2)坡地产流:

1)二维坡地水量转化数学模型:

式中,c(ψm)为比水容;ψm为基质势;k为非饱和导水率;x为水平距离;z为垂向距离;α为坡面坡度;t为时间;h为坡面水深;v为坡面流速;n为有效糙率;f为入渗率;Rat)为坡面承鱼强度;b为植被截留衰减系数。

2)坡面产流模型:

连续方程:

 

 

运动方程:

 

式中,h为坡面水深;v为坡面流速;α为坡面坡度;r为降雨强度;i为入渗率;t为时间;g为重力加速度;γ为切应力;h*为雨滴降落到土壤表面产生的压力增量确定的高度;ρ为水的密度;v*为雨滴降落速度。

 

参考文献

刘贤赵,康绍忠:降雨入渗和产流问题研究的若干进展及评述。水土保持通报,1999,19(2)

 

How to Cite

《资源环境数学模型手册》 (2018). 降雨入渗和坡地产流模型, Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/9d92698f-e570-4bad-b675-98d1d2987061
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Last modifier : 
Zhiyi Zhu
Last modify time : 
2020-11-14
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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 : 
Zhiyi Zhu
Last modify time : 
2020-11-14
Modify times : 
View History

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