河相关系模型

河相关系模型

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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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Earth System SubjectEarth Surface SystemHydrosphere
Geography SubjectPhysical GeographyHydrology

Detailed Description

河相关系模型

(1)方法一:水利几何形态法:

        由一组方程式所确定的河相关系式:

                 B=aQb

 

                 h=cQf

 

                 V=kQm

 

                 J=eQz

式中,B为河宽;h为平均水深;V为平均流速;J为比降;Q为流量;a,c,k,e为系数;b,f,m,z为指数。

(2)方法二:利用一组联立方程式求解河相关系式:

  对于平原冲积河流:

               Q=BhV

  水流连续方程:

               V=

  悬疑质输沙平衡方程:

              

  河相关系基本方程式:

              B=ƒh

式中,n为糙率;S为床沙质的悬移质含沙量;w为悬移质泥沙颗粒的沉速;p为系数;g为重力加速度;r为指数。

(3)起动平衡条件的河相关系式:

                 B=ξ0.511A-0.438d-0.146Q0.438

                 h0.438A-0.482d-0.161Q0.482

                 V00.073A-0.920d0.307Q0.80

J0.496A2.50d0.832n2Q-0.482

式中,A=1.14rs为泥沙的容重;V0为起动流速;ξ为常数。

(4)以推移质输沙为主的河流的河相关系:

            B=ξ0.514A-0.438K0.083(AC0)-0.167×(gqsw)-0.083d-0.056Q0.486

            h-0.486K0.083(AC0)-0.167×(gqsw)-0.083d-0.056Q0.486

               V-0.028K-0.166(AC0)0.334×(gqsw)0.166d-0.102Q0.028

                              J0.592K-0.444(AC0)0.889×(gqsw)0.444d0.296Q-0.592

式中,K=K0K0为综合系数;为无量纲谢才系数;V为止动流速。

(5)以悬移质输沙为主的河流的河相关系:

周志德:冲击河流的河相关系。地理研究,1984,3(4)

 

How to cite

《资源环境数学模型手册》 (2018). 河相关系模型, Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/b02b40ec-8f75-45ff-88ec-a252a335046a
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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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Is authorship not correct? Feed back

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