坡面径流冲刷及泥沙输移的计算

坡面径流冲刷及泥沙输移的计算

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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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Earth System SubjectEarth Surface SystemHydrosphere
Geography SubjectPhysical GeographyHydrology

Detailed Description

坡面径流冲刷及泥沙输移的计算

 

(1)发生细沟与流量及坡度的临界条件:

1)侵蚀沟深与流量及坡度的方程式:

            

式中,H为侵蚀沟的深度;Q为径流量;S0为坡面原始坡度。

2)临界流量与坡度的关系式:

            

式中,Qc为临界流量。

3)坡面上细沟侵蚀发生的临界流量表达式:

           

式中,qc为坡面上细沟侵蚀发生的临界流量;c=1/n(τc/g)5/3为常数,n为满宁粗糙系数,τc为细沟发生的临界切应力,g为重力加速度;θ为坡面倾斜度。

(2)细沟径流是侵蚀产沙特征:

细沟侵蚀率与径流量和坡度的关系式:

                   

式中,E为侵蚀强度;Q为径流量;S0为地面坡度;a,b,c为系数。

张科利,秋吉康弘,张兴齐:坡面径流冲刷及泥沙输移特征的试验研究。地理研究,1998,17(2)

 

How to cite

《资源环境数学模型手册》 (2018). 坡面径流冲刷及泥沙输移的计算, Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/8126816a-85a0-4bbd-a7b0-56762d4d30b8
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Contributor

contributed at 2018-12-04

Authorship

Affiliation:  
岳天祥编著
Email:  
yue@lreis.ac.cn
Homepage:  
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