山洪灾情评估模型

山洪灾情评估模型

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Contributor(s)

Initial contribute: 2018-12-04

Authorship

Affiliation:  
岳天祥编著
Email:  
yue@lreis.ac.cn
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Classification(s)

Application-focused categoriesNatural-perspectiveLand regions

Model Description

Chinese {{currentDetailLanguage}} Chinese

山洪灾情评估模型

 

(1)山洪冲击力模型:

 

 

 

式中,为作用在流速方向垂直单位面积上的动压力为山洪流体容重为重力加速度;为流速。

 

(2)承灾体承灾能力分析模型:

 

 

 

式中,为第类承灾体的受损害程度;为冲击力;类承灾体承受山洪冲击的极限能力;为待求系数。

(3)灾情等级评价模型:

 

 

(4)产流模型:

 

 

式中,为下渗强度;稳渗率为最大下渗强度与稳渗率之差;为控制带内孔隙的总体积;为饱和前能被储存于控制带内的水的体积;为与下渗强度减速度有关的系数。

 

(5)洪水运动连续方程:

 

 

式中,为入流量;为出流量;为格网单元内储存水的数量;为时间。

 

(6)洪水运动流速公式:

 

 

式中,为流速;宁系数;为比降;为水力半径;为经验参数。

 

(7)泥沙冲淤连续方程:

 

 

式中,为从邻近格网单元的泥沙输入量;为本格网单元的泥沙冲淤量;为泥沙输出量;为本格网单元水体中的泥沙浓度;为时间;为格网单元内水的储存量。

 

(8)泥沙输送亏损模型:

 

 

式中,为输沙能力;为实际输沙率;沉积的一阶反应系数。

 

 

参考文献

赵士鹏:基于GIS的山洪灾情评估方法研究。地理学报,199651(5)

 

How to Cite

《资源环境数学模型手册》 (2018). 山洪灾情评估模型, Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/954f29cc-bbb8-4b96-bc8f-560ae146c525
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History

Last modifier : 
tingxin
Last modify time : 
2020-11-04
Modify times : 
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Contributor

Initial contribute: 2018-12-04

Co-contributor(s)

Authorship

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

History

Last modifier : 
tingxin
Last modify time : 
2020-11-04
Modify times : 
View History

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