泥沙起动条件与乱石浅滩航道整治线宽度的计算公式

泥沙起动条件与乱石浅滩航道整治线宽度的计算公式

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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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泥沙起动条件与乱石浅滩航道整治线宽度的计算公式

(1)无黏性泥沙的起动拖拽力计算公式:

            τC/(γS-γ)d=f(u*d/v)

式中,τC为泥沙起动拖拽力d为泥沙粒径;γSγ分别为泥沙和水的容重;u*为摩阻流速;v为水的运动黏滞系数。

(2)泥沙起动流速计算公式:

1)张瑞瑾公式:

式中,UC为临界水流条件下的垂线平均流速;h为水深。

2)唐成本公式:

     

式中,γγC分别为泥沙干容重和稳定干容重;g为重力加速度;ρ为水的密度;c为粘结力系数。

3)窦国仁公式:

  

式中,KS为河床粗糙度;εK为粘结力系数;δ为与沙粒缝隙大小有关的特性厚度。

4)沙玉清公式:

式中,δ为薄膜水厚度;ε为孔隙率。 

(3)拖拽力计算公式:

                   τ=γhJ

式中,τ为水流作用于床面卵石的拖拽力;h为浅滩整治后整治水位时的断面平均水深;J为整治后整治水位时的比降。

(4)卵石浅滩整治线宽度计算公式:

            

式中,B为卵石浅滩整治线宽度;Q为整治水位时通过的流量;A为系数;d为卵石粒径。

钟恩清:泥沙起动条件与乱石浅滩航道整治线宽度的确定。地理研究,1992,11(2)

 

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《资源环境数学模型手册》 (2018). 泥沙起动条件与乱石浅滩航道整治线宽度的计算公式, Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/70267703-4564-4375-9ed3-36dd7692c464
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zhengzhong
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initial contribute: 2018-12-04

Authorship

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

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Last modifier : 
zhengzhong
Last modify time : 
2020-12-24
Modify times : 
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