Old conduits

[BBened]

Hi all,

Does anybody know where to find valuable info about the roughness coefficient of aged conduits?

Especially Manning's n?

Thanks

 

[LHA]

MSN Live Serach of "coefficient"+"old pipe"+"roughness" yields 15 results that look promising.

Engineering is the practice of the art of science - Steve

 

[dicksewerrat]

In your old text book on open channel hydraulics

Richard A. Cornelius, P.E.

http://WWW.amlinereast.com