some questions on designing pondless feature

Discussion in 'Water Features' started by andyslawncare, Sep 22, 2010.

  1. andyslawncare

    andyslawncare LawnSite Senior Member
    Posts: 812

    I'm bidding on a back yard feature with a drop of about 7 feet. It will be 35' to 40' long and end to a basin which will be incorporated into a 23' radius pave stone patio with fire pit.

    I figured I would make it meander through 2 or 3 curves and have 7 to 10 falls, maybe a few falls with more than one cascade.

    Should I have less falls with a greater drop? Or would 8 to 10'' per fall give the sound effect that we want to create? I want it to be heard from the upper patio 30' away from the start of the falls (70' away from the basin and last fall).

    Also, how many GPM should I use on a feature of this size? and how wide should I plan to make it? I was thinking 3' wide or so?

    Thanks for looking and I appreciate any advice for my design.

    I'm going to do some image editing with pro landscape eventually for this project, and I will post the proposed look after I'm done.
     
  2. andyslawncare

    andyslawncare LawnSite Senior Member
    Posts: 812

    30 people look, but no one says a word? :(

    These aren't stupid questions are they?
     
  3. turner_landscaping

    turner_landscaping LawnSite Member
    Posts: 187

    Just from your measurements of your stream, you are already at roughly 15' of head pressure not including your fittings. So at 3' wide of your falls your pump size is gona be least 10000 gph of water going over your falls to give your achieved sound give or take a little. Make sure you use a 3" line or 2 2" lines with two separate pumps.
     
  4. tadpole

    tadpole LawnSite Bronze Member
    Posts: 1,216

    You will need at least 10,000 gph, prolly more to get the effect that you want. The primary/source waterfall should be 3 - 4 feet wide and incorporate a drop of 2 - 3 feet. This must be your focal point both visually and acoustically. Incorporate a catch basin at the base of the primary falls to control splash and create the desired sound. Vary the width and depth of the stream to create interest and maybe even include a couple of step pools.

    Pics would help as would a present site plan.

    A feature of this size footprint can incorporate so, so many interesting mini-features.

    Two pumps would be OK, but not really needed IMO unless you want to build some redundancy into the feature. This IS a good idea, if budget permits.

    Post more info; get more info!!
     
  5. STL Ponds and Waterfalls

    STL Ponds and Waterfalls LawnSite Bronze Member
    Posts: 1,177

    On this build I used an Anjon Bigfrog 5500 pump. The width is close to what you want, but I'm not sure it will produce the sound your wanting.

    Another thing to look at is most 10K pumps will average $90-$100 a month to run. He He I couldn't resist when I found this vacation pic.

    100_0217.jpg

    100_0644.jpg
     
  6. tadpole

    tadpole LawnSite Bronze Member
    Posts: 1,216

    Andy should use the first photo as a design template. Something like that would definitely please his client. They would, for sure, get more 'splash for the cash'. I would love to tackle a project like that!
     
  7. tadpole

    tadpole LawnSite Bronze Member
    Posts: 1,216

    Sorry Keith. The second photo is also great.
     
  8. wurkn with amish

    wurkn with amish LawnSite Senior Member
    Posts: 663

    Keith when I saw the first pick I was like holy cow thats amazing with 5500gph pump! Then you teaseded me.......
     
  9. STL Ponds and Waterfalls

    STL Ponds and Waterfalls LawnSite Bronze Member
    Posts: 1,177

    More like 55000gph! Sorry Andy back to the topic.
     
  10. andyslawncare

    andyslawncare LawnSite Senior Member
    Posts: 812


    When you say catch basin at the beginning, do you mean just a deeper and wider area than the rest of the stream?

    I'm loading site plan number 1.
    I'm sure it will change.
    Right now I'm just in the process of figuring materials and spitting the client a price.

    I have a picture on my camera that I will post as soon as I restart the computer. Its not working right at the moment.

    Marion Wilton.jpg
     

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