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  • Users: ar9
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  1. ar9

    Pond Draining from X to Y Elevation

    Greetings, I have a project in which I would like to model a levee protected basin(in this case overtopped by surge) with culverts with one-directional valves to avoid backflow. I have setup the pond stage storages and outflow. I have also placed a link downstream of the pond with a table with...
  2. ar9

    Air Release Valves - Drainage Force Main

    I have a drainage pump station with vertical pumps and wanted your commentary on the placement of Air Release/Vacuum Valves. I have added a quick sketch to better illustrate the situation. Will the air release valve by the pump allow air in as flow goes through the drop? The discharge has...
  3. ar9

    Pump Run Problems

    All, We have a vertical pump with discharge after pump, with CenterLine(CL) at El. +8'. We then have a 6' straight pipe (23" ID) with a 6" ARV on top. After the 6' of straight pipe, the discharge pipe has two (2) 90D Long Radius bend (vertical CL change), which brings the pipe CL to El. +2...
  4. ar9

    Breakwater Design

    We're in the process of designing a breakwater. I have been using the USACE Coastal Engineering Manual for the most part of the design. I have yet to find any recommendations on the height required for a Breakwater. Does anyone have any recommendations for the height of the breakwater? Should I...
  5. ar9

    Flow through culverts

    Basic question here. I have culverts for drainage water draining gravity flow. The Culverts ends are both submerged. I have a higher head water than tail water elevation, however, the culvert has an adverse slope. How does this affect the hydraulics? Using Bernoullis, the head differential...
  6. ar9

    Pump Modeling

    All, I am modelling a basin and have basic existing pump information. I have ESTIMATED the pump curves and think that will work, however, for some reason I cannot select when the "Pump Off" elevation. It does not let me click on it and I am not sure why. Also, is there a way to have an outlet...
  7. ar9

    Modifying TW elevations

    I am modeling a Basin and would like to analyze the idea of culverts with a check valve. I know that HydroCAD has a 1-way value and this is great for when my TW is above my HW. I want to know if there is a way to edit the TW elevations at different hours. I am analyzing a storm surge and the...
  8. ar9

    HydroCAD Modeling

    I am modeling a Basin and would like to analyze the idea of culverts with a check valve. I have added these as outlets to the model. Is there a way to input the amount of time/day the culverts will flow? Or, is there a way to set DIFFERENT tailwaters at different hours of the day? Basically, the...
  9. ar9

    Skin Friction for Driven Piles

    Hello, I am looking into a project that will have driven piles due to the soils (very soft clays). I have a boring and lab test results which include the Unconfined Compressive Strength. This might be great for end bearing, I was wondering if someone could tell me if the following equation is...
  10. ar9

    Bearing Capacity

    I am building a slab and I will be using 12"x12" piles. I need to know the required length (depth) of the piles but I do not have a bearing capacity. I was given a Geotech "report" that was performed years ago. It is really not a report as I was only provided with the Boring Logs. I was...
  11. ar9

    Pumps in Parallel

    Greetings, My current project has two pumps (Vertical Turbine Pumps) each with different bell and suction pipes, however, they both discharge in one larger pipe to an open tank. Given that each of the pumps is at a capacity of 5,000 gpm and that the discharge pipes will manifold after pumping...

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