Submerged Storm Outlet
Submerged Storm Outlet
(OP)
I am working on a project that involves taping into an existing storm sewer that has a submerged outlet. In low water conditions, the outfall is only about a meter submerged. However, in flood conditions, the water level can raise 4 meters. What will this do to the flows coming down the line? As the flow continues the build up will the difference in head cause the water level to equalize or will the line continue to back up? What does this do to my flow and size of pipe?





RE: Submerged Storm Outlet
Also depends on if the head at the upstream end increases to match the tailwater increase too. If that happens, there will be no change due to the tailwater increase alone.
If the upstream head is greater than the tailwater increase, then the flow should increase.
Look at the total head in the system.
Mike McCann
MMC Engineering
RE: Submerged Storm Outlet
RE: Submerged Storm Outlet
A backwater analysis may be a good option to look at in this case. SWMM may be a good tool for this.