沟畦灌溉水流运动的数学模拟

沟畦灌溉水流运动的数学模拟

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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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Method-focused categoriesData-perspectiveGeostatistical analysis
Method-focused categoriesProcess-perspectivePhysical process calculation
Method-focused categoriesProcess-perspectiveHuman-activity calculation

Model Description

Chinese {{currentDetailLanguage}} Chinese

沟畦灌溉水流运动的数学模拟

(1)体积平衡模型:

      

                

式中,为进入沟畦中的总水量;为沟畦中地面蓄水量;为入渗到土壤中的水量;Q为入沟流量;t为灌水时间;t时刻沿程s点的水流剖面;t时刻s点的入渗剖面;为水流前锋到达s点的时间。

(2)水流运动方程:

    

式中,y为时间坐标;x为空间坐标;Q(x,t)点的断面流量;A(x,t)点的水流横断面面积;Z(x,t)点单位沟长上的入渗水量;,为水力阻力顶;,为入渗引起的动力顶;S0为沟底纵坡;,为作用在断面上的压力除以单位体积水重γSf为水力阻力坡降;B(x,t)点的水面宽度;y(x,t)点的水深。

(3)定解方程模型:

   

(4)运动波模型:

式中,C为谢才系数;R为水力半径;n为田间糙率。

参考文献:

   路京选,刘檀仁,惠士博:沟畦灌溉水流运动数学模拟简介。自然资源,1989,1

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How to Cite

《资源环境数学模型手册》 (2018). 沟畦灌溉水流运动的数学模拟, Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/e8016383-aa94-4fa5-9db2-b46d2694dad7
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Last modifier : 
Zihuan Wang
Last modify time : 
2020-10-31
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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

History

Last modifier : 
Zihuan Wang
Last modify time : 
2020-10-31
Modify times : 
View History

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