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How To Determine The Pipe Is Partially Or Fully Filled

manning equation hydraulic radius

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#1 ADR

ADR

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Posted 01 September 2017 - 06:21 AM

Hello all

 

I was reading the topic "Hydraulic Radius of Partially Filled Circular Conduits" started by ankur2061 on May 20 2009. The spreadsheet he developed helps to calculate the hydraulic radius which is fine but I would like to know how to determine how full the pipe is? Is there any equation?

 

There is one more thing which I would like to check with you guys, the unit of average velocity calculated using the Manning  equation is m/s however, I don't see a time factor anywhere. Is 'n' - manning's coefficient dimensionless or does it have a unit? 

 

Thanks

Allen



#2 demank

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Posted 02 September 2017 - 07:20 AM

"n" is not dimensionless., it have a unit s/[ft1/3] or s/[m1/3]



#3 breizh

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Posted 02 September 2017 - 08:55 PM

http://engineersedge...calculation.htm

 

take a look

Breizh



#4 ADR

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Posted 05 September 2017 - 10:18 AM

Thanks Demank and Breizh






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