山区小流域洪水过程中泥沙搬运方式分析公式

山区小流域洪水过程中泥沙搬运方式分析公式

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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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山区小流域洪水过程中泥沙搬运方式分析公式

(1)在斜坡上泥沙的起动拖曳力:

            

式中,为沟床纵坡;为泥沙在水下的休止角;为平底时的起动拖曳力;为泥沙容重;为浑水容重;D为欲搬运的泥沙直径。

(2)沟槽泥沙在水流动力及其自身重力作用下开始运动的临界条件:

          

式中,h0为水深;h为沟槽泥沙活动层深度;c*为静止泥沙层中固体颗粒的体积浓度;为固体颗粒容量;为泥石流发生前浑水容重;为泥沙的内摩擦角;为形成区沟床坡度。

(3)对于矩形或“U”形断面的沟槽,泥石流的容重

           

丁永建:山区小流域洪水过程中泥沙搬运方式的初步研究。地理学报,1989,44(4)

 

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How to Cite

《资源环境数学模型手册》 (2018). 山区小流域洪水过程中泥沙搬运方式分析公式, Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/741f3112-c471-40ec-ba6d-4094f1d96225
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zhangshuo
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initial contribute: 2018-12-04

Authorship

Affiliation:  
岳天祥编著
Email:  
yue@lreis.ac.cn
Homepage:  
View
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Last modifier : 
zhangshuo
Last modify time : 
2020-10-29
Modify times : 
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