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  1. Bill R

    Flatland Detention

    The starting elevation for water storage is typically the area's water table elevation. Are you saying that is just 2' below your site's ground surface? If so, you will likely have to elevate the rest of the site to effectively increase the storage height of that pond. This sounds like a water...
  2. Bill R

    good reference to size the pipe diameter against flow coming from a pump

    Pressure will be involved, so the Hazen-Williams equation is a common one to use in this case. As there are a lot of unknowns such as downstream pressure, length, etc, just checking the pressure loss on a certain size of pipe at your rated gpm is a good start. You can quickly do some checks...
  3. Bill R

    Basin with two outlets

    What you describe does not sound much different from simply having two ponds on a site that are interconnected and then there is a single point of discharge, presumably from the second larger pond. In your case, is the site's existing point of discharge the existing pond? It sounds like it must...
  4. Bill R

    Calculating hydraulic grade line on storm drainage with two outfalls

    gbam: Good point about going with the EGL. I'm not sure if ASAD utilizes it or always goes with HGL, will have to explore that. I have actually downloaded SWMM recently but have not gotten around to installing and working with it. I like to have as much experience with different programs as...
  5. Bill R

    Calculating hydraulic grade line on storm drainage with two outfalls

    Hello, we are performing some analysis on a retrofit situation where additional flow is being added to an existing drainage system via some additional inlets and pipes to capture previously overland flow. Currently the network has a single outfall to a wet detention lake and our results are...
  6. Bill R

    ethics

    You would not be the engineer of record in that case, but perhaps a delegated engineer if anything (review your state's rules). I do not see an immediate ethical or misconduct issue unless there is some apparent intent to bypass state laws regarding practice of engineering by some party.
  7. Bill R

    ethics

    If you are licensed, then you should follow all of your state's rules and laws with regard to the practice of engineering. I would imagine most states are like mine in that an engineer may practice under their given name, so your boss would essentially be your client and his company would not...
  8. Bill R

    Difference in output with Hydrocad vs ICPR, methodology or other?

    Thank you psmart! I did identify an issue by checking that total volume. Apparently ICPR is not very accurate with time increments at 30m, Hydrocad does not change nearly as much with those higher increments. That improved the model on ICPR greatly, but still there is some difference in the...
  9. Bill R

    Difference in output with Hydrocad vs ICPR, methodology or other?

    My company typically models with ICPRv3 however I am trying to make a case for Hydrocad. I discovered it from this forum and to be honest it fits with how I learned water resources better than ICPR despite having used ICPR in school. Anyway, there is a project that we have been struggling to fix...

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