Maximum flow capacity of a water diversion tunnel
Maximum flow capacity of a water diversion tunnel
(OP)
I have been tasked with researching the capacity of a very old water diversion tunnel. This tunnel was constructed in 1939 and very little design information has survived. In the absence of historic data, how can I calculate the maximum flow of this tunnel?
Particulars of construction are as follows: 12ft high, 16ft wide, 1050ft long. Change of elevation from inlet to outlet is 2.5ft. Maximum expected head is 15.2ft, minimum head is 7ft. The tunnel was blasted through solid bedrock and is not lined.
Any help you guys can give would be greatly appreciated.
Particulars of construction are as follows: 12ft high, 16ft wide, 1050ft long. Change of elevation from inlet to outlet is 2.5ft. Maximum expected head is 15.2ft, minimum head is 7ft. The tunnel was blasted through solid bedrock and is not lined.
Any help you guys can give would be greatly appreciated.





RE: Maximum flow capacity of a water diversion tunnel
Mike McCann
MMC Engineering
http://mmcengineering.tripod.com
RE: Maximum flow capacity of a water diversion tunnel
Richard A. Cornelius, P.E.
WWW.amlinereast.com
RE: Maximum flow capacity of a water diversion tunnel
I haven't even looked at my hydroligy books in 12 yrs so I am a bit foggy on the subject. Thnaks a lot.
RE: Maximum flow capacity of a water diversion tunnel
Good luck!
RE: Maximum flow capacity of a water diversion tunnel
If it were me, I wouldn't assume a pressure head in it at all. I'd determine the open channel flow capacity at a depth equal to the height of the tunnel and report that as the "maximum flow capacity." Technically it has infinite capacity under infinite head.
Hydrology, Drainage Analysis, Flood Studies, and Complex Stormwater Litigation for Atlanta and the South East - http://www.campbellcivil.com
RE: Maximum flow capacity of a water diversion tunnel