泥石流阻力分析模型

泥石流阻力分析模型

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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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Application-focused categoriesNatural-perspectiveLand regions

Model Description

Chinese {{currentDetailLanguage}} Chinese

泥石流阻力分析模型

(1)固液两相的划分模型:

               

式中,D0为在大悬浮颗粒粒径,大于D0的颗粒为固相的组成部分,小于D0的颗粒为液相的组成部分;为固体颗粒容重;为浆体容重;为宾汉极限剪切力;K为系数。

(2)阻力计算模型;

1) 泥石流阻力的模型:

             

式中,V为泥石流断面平均流速;R为水力半径;J为沟床比降;g为重力加速度。

2)清水阻力模型:

           

式中,D95为河床质代表粒径;H为水深。

3)推移质运动造成的附加阻力Jp模型:

          

式中,S为推移质在床面上的覆盖率;α为固体颗粒水下休止角;为推移质中值粒径。

祁龙:泥石流的阻力分析。水土保持通报,1989,9(6)

 

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How to Cite

《资源环境数学模型手册》 (2018). 泥石流阻力分析模型, Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/0ffef29c-9d39-45fd-a8c9-c8d63d78ef55
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Last modifier : 
Zhiyi Zhu
Last modify time : 
2020-11-14
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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 : 
2020-11-14
Modify times : 
View History

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