Hydraulic Grade Line Calcualtion
Hydraulic Grade Line Calcualtion
(OP)
I was asked to furnish hydraulic grade line calculations for a system of 4 pipes that go from CB to CB. I created a spreadsheet, but I am getting for my last 2 pipes (upstream) the E.G is lower than the invert of the pipe. Is that possible? Also, does anybody know of a spreadsheet that is already developed for this?





RE: Hydraulic Grade Line Calcualtion
The process is relatively straight forward to code within a spreadsheet. There are a number software packages that use the HEC22 procedure.
Free -- EPA SWMM 5.0, Demos of fee based software.
$$$$ -- Stormcad, Inroads Storm & Sanitary, Hydraflow, HYDROCAD to name a few.
Goodluck.
RE: Hydraulic Grade Line Calcualtion
Depth and Velocity are either positive or zero, so it is not possible for energy grade to be below the invert.