构造运动影响河流纵剖面及河道冲淤的数学模型

构造运动影响河流纵剖面及河道冲淤的数学模型

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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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构造运动影响河流纵剖面及河道冲淤的数学模型

1)在一维情况下,若没有构造运动,则河床动力模型为:

式中,为河宽;为平均水深;为平均流速;为河床平均高程;为断面平均含沙量;为水流挟沙能力;为断面平均泥沙沉速;为泥沙干容重;为重力加速度;为水力半径;为谢才系数;分别为距离和时间;为系数。

 2)存在构造运动时,设初始时刻时的河床高程为;又设到任意时刻的时段内,构造运动累积升降量为,且;泥沙累积淤积厚度为,且,基面变化为,则,构造运动的河床动力模型为:

 3)河流纵剖面对构造运动的响应:

在构造运动较弱的情况下:

在构造运动较显著的情况下:

在构造运动强烈的情况下:

 4)构造运动与泥沙冲淤的数量关系:

在构造运动较弱的情况下:

  由此得:

  在来水来沙、周界条件无趋势性变化的情况下:

式中,为平均冲淤量。

对构造运动较弱的一般情况:

 

参考文献:

    贾绍风:构造运动影响河流纵剖面及河道冲淤的数学模型。地理学报,199449(4)

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How to Cite

《资源环境数学模型手册》 (2018). 构造运动影响河流纵剖面及河道冲淤的数学模型, Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/be7a072a-e352-4e1b-babb-54b958e3018b
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Last modifier : 
zhengzhong
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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

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Last modifier : 
zhengzhong
Last modify time : 
2020-11-09
Modify times : 
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