By joining you are opting in to receive e-mail. A larger coefficient will increase the HW elevation. Our program does not calculate the HGL inside the manhole like Hydraflow does, just inside the pipes, however the upside is our program prints to autocad in a graphically superior look than hydraflow. The entrance coefficient that was used to create the charts is likely larger than the one that hydraflow uses to check for inlet control. It's a good approach at sizing pipes, but in reality it means that each pipe is sized for a slightly different storm event. Download Now 3D printing is developing fast. 
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Promoting, selling, recruiting, coursework and thesis posting is forbidden. Click Here to join Eng-Tips and talk with other members! In analyzing the results from the program, it appears that the HGL for the upstream end is computed utilizing the downstream invert. I suggest you pick up a good book on open channels Storm Sewers generally operate as open channels such as Open Channel Hydraulics by Sturm to get hydravlow better understanding of what the software is actually doing.
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Computing HGL utilizing Hydraflow Storm Sewers - Storm/Flood engineering - Eng-Tips
That could be a reason for the difference between your results and those in the headwater depth charts. The entrance coefficient that was used to create the charts is likely larger than the one that hydraflow uses to check for inlet control. Download Now 3D printing atorm developing fast.
Most software programs calculate the HGL in the same way. It's a good approach at sizing pipes, but in reality it means that each pipe is sized for a slightly different storm event. I set the codes to check for inlet control; however, I have been questioned by the review engineer as to why hydrafllow HGL does not correspond seweers that computed using the headwater depth charts from the Hydraulic Design of Highway Culverts as published by the USDOT. For supercritical slopes it proceeds in a downstream direction.
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Autocad Civil 3d Hydraflow Storm Sewers Extension
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If anyone has any input on this issue, it would be much appreciated. The Eng-Tips staff will check this out and take appropriate action. Close this window and log in. A larger coefficient will increase the HW elevation.
Download Now While the basic methodologies of traditional manufacturing remain the same, there are many efficiencies and levels of automation that have augmented modern machinery over the past decade. Join your peers on the Internet's largest technical engineering professional community.
Design requirements differ in different locations. Our program does not calculate the HGL inside the manhole like Hydraflow does, just 22005 the pipes, however the upside is our program prints to autocad in a graphically superior look than hydraflow. Hydraflow gives you three default options for the starting HGL: Register now while it's still free!
HGL is computed starting at the downstream invert for Hydraflow. He was my adviser in grad school.
Autocad Civil 3d Hydraflow Storm Sewers Extension - Autocad - Design Pallet Workshop
Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework. It also means that the flows don't add up, which can really throw some engineers and regulators for a loop if they don't understand what the software is doing.
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Are you an Engineering professional? While the basic methodologies of traditional manufacturing remain the same, there are many efficiencies and levels of automation that have augmented modern machinery over the past decade.
I use that very book more than any other reference book. Product Data Management PDM exists to keep track of the many design documents produced during product development.
Second an isolated culvert, which is what the charts from the USDOT are for, and a storm sewer network are two different things. In Houston the City criteria states that if the 0205 HGL at the discharge location is not known, one has to use the crown of the pipe on the downstream end for starting HGL.
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