稳定渠道几何形态解析模型

稳定渠道几何形态解析模型

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Initial contribute: 2018-12-04

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岳天祥编著
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yue@lreis.ac.cn
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Method-focused categoriesData-perspectiveGeoinformation analysis
Method-focused categoriesProcess-perspectivePhysical process calculation

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Chinese {{currentDetailLanguage}} Chinese

稳定渠道几何形态解析模型

(1)外力平衡方程:

           F2+(Wsinθ)2=(Wcosθf)2

 

                                  W=ɑ1rs-r)Ds

 

                                 F=ɑ2D2τ0

 

                                τ0=rhjsinɑ=rhj

式中,f为泥沙静摩擦系数;θ为渠道边坡倾角;W为泥沙颗粒水下重量‘F为水流方向上作用于颗粒的当地水流作用力;τ0为当地水流切应力;ɑ为流动方向与水平面的交角。

(2)稳定渠道断面曲线分析解:

(3)稳定渠道水面宽度计算公式:

(4)过水面积计算公式:

式中,A为过水面积。

      5)湿周计算公式:

式中,P为湿周。

6)河相关系的理论表达式:

式中,=0.567+0.0222D,D为粒径;K为反映床面的阻力特性的系数。

7)Egiszaroff公式:

          

式中,为起动切应力。

8)稳定渠道断面曲线表达式:

  抛物线型断面:

            

  余弦曲线型断面:

            

孙志林:稳定渠道几何形态解析。地理研究,1992,11(4)

 

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《资源环境数学模型手册》 (2018). 稳定渠道几何形态解析模型, Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/b3424fed-33c0-4047-a589-4d7aa265d375
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Zhiyi Zhu
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Initial contribute : 2018-12-04

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Authorship

:  
岳天祥编著
:  
yue@lreis.ac.cn
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Last modifier
Zhiyi Zhu
Last modify time
2020-11-14
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