All of them are controlled by following factors: discharge ratio, junctionAngle, difference in bed height, width to depth ratio and Froude number downstream the confluences.
影响汇流口的主要控制因素有：汇流比、汇流角、河床高差、宽深比、汇流口下游干流弗劳德数等。
2
When the linear length of the protecting pipe is over 30m, the junction box should be added; and when there are more than 2 right-angle bends, junction box should be added between them.
保护管直线长度超过30 m时需加装接线盒，同一管线超过两个直角弯时应加设中间接线盒。
3
In this paper, the mathematical model of lain droplet at water-phobic membrane of glass surface was theoretically studied and calculational formula and result of the junctionAngle were obtained.