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has anyone done a pondless system that functions for drainage?

Discussion in 'Water Features' started by andyslawncare, Jun 1, 2011.

  1. STL Ponds and Waterfalls

    STL Ponds and Waterfalls LawnSite Bronze Member
    Messages: 1,174

    I can't wait to do a permeablr driveway with a Rainwater system. Contamination might not be what you think with the benefits of the filtration that a permeable system has. Think about the parking lot systems that runoff into creeks and sewer systems, they are suppose to be great filters.
  2. tadpole

    tadpole LawnSite Bronze Member
    Messages: 1,221

    If you are using fabric as a base for your creek beds, it would have to be replaced with liner and, I agree, reduce the amount of cobble used and replace it with medium and large gravel.

    I question the claim that permeable pavings are good filters. If they were, they would clog up the same as would any other filter and they also have no capacity to break down Hydrocarbons which are a parking areas primary pollutant. This is the primary advantage to the environment that permeable pavings contribute. Most, if not all, pollutants are allowed to 'permeate' through the pavings directly into the ground, INSTEAD of being carried away in run-off to contaminate streams and other natural water ways.
  3. STL Ponds and Waterfalls

    STL Ponds and Waterfalls LawnSite Bronze Member
    Messages: 1,174

    I havent any test but that is what I was told when we did a permeable parking lot that was connected to a stream. Problem is without independant testing how can you really determine the filtering realities.
  4. tadpole

    tadpole LawnSite Bronze Member
    Messages: 1,221

    This is absolutely true of ANY manufacturer's claim of product performance. Common sense will tell you that if a product 'filters' it removes and holds whatever substance(s) may have been in solution. Over time these removed substances build up and the said product will clog. In this case, the permeable paving would become impermeable and no different than any other paving material.
  5. Mr. Vern

    Mr. Vern LawnSite Senior Member
    Messages: 632

    With regard to the filtration claims I don't think the filter is the paving as much as it is the gravel in the water feature. I think that emulating nature is the best way to filter pollutants, but my cocern is whether the chemicals can be filtered effectively and quickly enough for irrigation purposes. I suppose I may have to build one to find out.
  6. STL Ponds and Waterfalls

    STL Ponds and Waterfalls LawnSite Bronze Member
    Messages: 1,174

    As far as clogging they are suppose to be on a cleaning schedule to keep them clear. The job we did I thought the GC said they have to clean theirs once a year. Plus, they are designed for a certain percentage of clogging. We'll find out as more permeables are built and grow out of their infancy.
  7. andyslawncare

    andyslawncare LawnSite Senior Member
    Messages: 812

    I agree with smaller inside stones if something like this is built. I have worked on waterfalls before, and understand the head pressure and flow rate ratios. This particular property's picture is not being considered for a conversion, but I'm playing with ideas in my head for other properties that I bid which will receive similar treatment. I use the larger stones on many of my creek beds, I like to use the medium river flats because they draw attention where I want the attention to be taken to. I don't think on a property like this I would want a really flashy over the stone look...I'm thinking more along the lines of the sound and the visible while passing by it. I may not make sense, and that's why its just an idea still.

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