How to properly design a groundwater drain?

Discussion in 'Open Loop' started by surviverguy, Sep 28, 2011.

  1. surviverguy

    surviverguy Member

    I am trying to design a proper drain for a 6 gpm flow. Does anybody know the title of any government publications that I might easily find or some reference materials for recommended specs and proceedures for constructing a ground dispersement type drain? What is technical type name for this (drain). Or can anyone just tell me how to do it? AMI contracting recommended a minimum of 4" drain a proper drain difficult to engineer? Do I need a pro or a hydraulic engineer or NRCS involvement? The grade of the wooded hill of the proposed drainsight is approx. 25 percent. The drain could be anywhere from 10-40 foot wide. The piping leading to the drain could be either 1" or 1 1/4". The second option for a drain sight would be at the bottom of the same hill where the land is flat. This option would require an extra 200-250 feet of piping and trenching. Which optional location would be best? I imagine the level sight would be prefered to reduce erosion chances and flow cleaner water with less contamination (dirt/mud). Any other information needed just ask. Thanks for any tips or advice.
    Last edited: Sep 28, 2011
  2. waterpirate

    waterpirate Well-Known Member Industry Professional Forum Leader

    I would look at some ways to deal with storm water management to guide you. They have been doing buffers and to filter the water prior to entering the watershed for years, as well as leaching it back into the the ground. 6 gpm is not a lot but over time it adds up. Lowering the velocity of the water is key, slow flow equals low erosion.
  3. surviverguy

    surviverguy Member

    Thanks Waterpirate. I was studying BMP's (best management practices for storm water) yesterday. That's where I got the idea to drain at the bottom of the hill instead of on the hill. After studying the BMP's it occured to me that there might be some manuals for drains...government makes lots of manuals. Somebody might tell me what works good between the delivery pipe and the ground. A wider drain would equal slower velocity. The more gravel the better. Protect the drain from plant roots.
  4. AMI Contracting

    AMI Contracting A nice Van Morrison song Industry Professional Forum Leader

    make sure it leans downhill:D
    one should have an air gap so blockage or flood do not contaminate potable water.
    Water temps (cold in winter/hot in summer) helps mitigate root problems.
  5. surviverguy

    surviverguy Member

    Thanks guys. I think I can handle the engineering on this new drain now. I would have made the mistake of plumbing plumb!
  6. urthbuoy

    urthbuoy Well-Known Member Industry Professional Forum Leader


    Just for the record, the expert in question would be a hydrogeologist.

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