gonygonygo
Civil/Environmental
- Jan 14, 2011
- 2
Hello all Engineers,
I am a new member to this site and occasionally browse the forum topics when I have a question. However, I have been unable to find any topics specific to my question this time around.
Here's a little background about myself... I am a 5-year EIT (taking the PE in April '11)that has moderate design experience modeling storm water flow.
Here's my question:
I have been tasked with designing a "flow-control" structure for a channel on the apron of a headwall directly in front of (2) exisitng pipe arch culverts. The culverts are located at a dirt road crossing of the channel. The discharge from the culverts is flooding the area downstream. I do not have any specific goal (velocity reduction, design storm, etc.); just to see what I CAN come up with and not flood the upstream area in front of culverts. BTW, there are no grading or disturbing activities allowed with this project due to permit restrictions.
Once designed, the upstream end of the channel before the culverts will serve as a "detention pond". The design is to not change base flows for small storm events, but to restrict discharge for large storm events.
My "flow control" will be one of the two options:
1) Add a restricting plate (reducing x-sectional area) at the inlet of the existing culverts...
2) Add a riser structure in front of the existing culverts...
I am planning to use Hydraflow Hydrographs, but I have never used it before to work with Pipe-Arch culverts as my detention pond outlet. I have only worked with circular or rectangular pipe culverts. I am proficient with all other areas of setting up my hydrograph(s), reach(es), and pond.
Is there a way around this? Is there some way I can incorporate a culvert analysis using Hydraflow Express (which DOES model pipe arch culverts) into Hydrographs to perform my routing and (stage-storage) elevations?
I appreciate any input or suggestions on performing this task! Thank You in advance!!
I am a new member to this site and occasionally browse the forum topics when I have a question. However, I have been unable to find any topics specific to my question this time around.
Here's a little background about myself... I am a 5-year EIT (taking the PE in April '11)that has moderate design experience modeling storm water flow.
Here's my question:
I have been tasked with designing a "flow-control" structure for a channel on the apron of a headwall directly in front of (2) exisitng pipe arch culverts. The culverts are located at a dirt road crossing of the channel. The discharge from the culverts is flooding the area downstream. I do not have any specific goal (velocity reduction, design storm, etc.); just to see what I CAN come up with and not flood the upstream area in front of culverts. BTW, there are no grading or disturbing activities allowed with this project due to permit restrictions.
Once designed, the upstream end of the channel before the culverts will serve as a "detention pond". The design is to not change base flows for small storm events, but to restrict discharge for large storm events.
My "flow control" will be one of the two options:
1) Add a restricting plate (reducing x-sectional area) at the inlet of the existing culverts...
2) Add a riser structure in front of the existing culverts...
I am planning to use Hydraflow Hydrographs, but I have never used it before to work with Pipe-Arch culverts as my detention pond outlet. I have only worked with circular or rectangular pipe culverts. I am proficient with all other areas of setting up my hydrograph(s), reach(es), and pond.
Is there a way around this? Is there some way I can incorporate a culvert analysis using Hydraflow Express (which DOES model pipe arch culverts) into Hydrographs to perform my routing and (stage-storage) elevations?
I appreciate any input or suggestions on performing this task! Thank You in advance!!