GleasonS
Civil/Environmental
- Feb 27, 2009
- 5
I found a solution to a similar problem on an old thread but couldn't work the procedure to correctly solve my problem. Any help with the following problem would be greatly appreciated.
I have an underground pipe system that will be used for storage and would like to assemble a stage storage table to check the results of my computer modeled results (Hydraflow Hydrographs 2007). On an old thread, I found the following equation, however it doesn't yield results that one would expect (eg. the calculated full volume isn't what it should be)
I also found this solution that, again, doesn't give me the results I would expect:
I have also looked up the procedure in HEC-22 with the same result. (This procedure is also duplicated in a number of state DOT hydrology manuals with minor variations)
To give some perspective, I am trying to assemble a stage storage table for an 12' long, 18" diameter pipe at a slope of 1.0%. It would seem that my max stage would be (assuming an starting invert of 100) 101.62. Like I said, I've tried modeling it a number of ways, and the max storage I was able to calculate was around 12cf not the 21cf one would expect.
Thanks
I have an underground pipe system that will be used for storage and would like to assemble a stage storage table to check the results of my computer modeled results (Hydraflow Hydrographs 2007). On an old thread, I found the following equation, however it doesn't yield results that one would expect (eg. the calculated full volume isn't what it should be)
I also found this solution that, again, doesn't give me the results I would expect:
I have also looked up the procedure in HEC-22 with the same result. (This procedure is also duplicated in a number of state DOT hydrology manuals with minor variations)
To give some perspective, I am trying to assemble a stage storage table for an 12' long, 18" diameter pipe at a slope of 1.0%. It would seem that my max stage would be (assuming an starting invert of 100) 101.62. Like I said, I've tried modeling it a number of ways, and the max storage I was able to calculate was around 12cf not the 21cf one would expect.
Thanks