I have designed a detention only pond that will attenuate the required storms (1 through 25-year 24-hour storms in my jurisdiction). In my design, I have accounted for tailwater conditions at the outlet. I obtained 10-year and 25-year tailwater elevations from digital flood maps. The city...
Thank you very much for your input Twinkie and beej67. I was hoping that I could treat discarded flow as being effectively 0 for my peak flow comparison. This will make my life a lot easier.
I am working on an infiltration basin design in eastern North Carolina. We had a licensed soil scientist investigate the site and he found that SHWT was only 33" (we expected around 60" for this area) and that the hydraulic conductivity, Ksat value, was 2.68 in/hr (we were expecting around 0.50...
A contractor has mentioned to me in the past that he has seen what people call "gator traps" used to get stormwater to flow upwards. According to him, these devices consist of a 90-degree elbow that has a spring-loaded cap on it. The spring pops up and the water comes out on top. These devices...
LittleInch,
Yes, it did. Thank you for your prompt reply. I have used some of your points in my reply to the state reviewer and added a bunch of others. Still waiting to hear back from them. I basically said that there are other ways to calculate losses such as using Darcy Weibach method (I...
I was hoping that someone here could clarify something for me regarding pump operating point. I have a project where I need to select a pump that will discharge wastewater to LPP field. I want the pump to pump 80 gpm of wastewater to the LPP field. Based on this desired flow rate of 80 gpm I...
We were discussing this in the office the other day and people are split on whether to consider compacted 8" CABC (crushed aggregate base course) with 3" of topsoil on top of it to be pervious or impervious. Some people say that since we have 3" of topsoil, that we should consider the entire...
I am working on a project that currently has an existing septic system with a design flow of 1,500 gpd. 1,500 gpd was based on the number of occupants and employees (250 occupants x 5 gpd/occupant + 10 employees x 25 gpd/employee = 1,500 gpd). This is an indoor trampoline facility. Our client...
