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Thread: Diverting rainwater away from pool

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    Unhappy Diverting rainwater away from pool

    Has anyone had any luck diverting rainwater away from their pool? I live at a bottom on a hill and when it rains REALLY hard, all the mud and dirt flies into my pool from up the hill. Worst part is, I completed my SLAM just two weeks ago and finally could swim in it again. Now its back to a swamp.

    I want to catch the water somehow from the top of my hill and toss it to the other end of my yard. I live on a corner lot so the water would end up just going into the street.

    My neighbors told me this happens once every two or three years as I just bought the place. Yet it has happened twice in two months. We are getting SO MUCH rain this season it is crazy. 7 inches both times.

    I can post pictures of my backyard later when I get home, but wondering if anyone else has done something similar already.
    23,000gal IG plaster, Sand filter

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    Mod Squad JVTrain's Avatar
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    Re: Diverting rainwater away from pool

    A viable fix would be digging a trench around the pool area, burying a drain tile hose in the trench surrounded and covered by aggregate stone. Images of the pool and the position in relation to the hill would be helpful. Upload them to photobucket/dropbox/etc. and link them here if you want more suggestions.
    Joel - TFP Moderator - Minnesota - **Become a TFP Supporter!** Helpful Links: ABCs of Pool Water Chemistry - SLAM Procedure - Chlorine/CYA Chart
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    Skitch's Avatar
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    Re: Diverting rainwater away from pool

    Sounds like you need some grading done to your yard. You want a swale behind the pool to divert the water away. I don't think a french drain as suggested by JVTrain is going to be enough.
    18k gal AG Sand Filter K-2006

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    Re: Diverting rainwater away from pool

    you need to find a way to divert the runoff around your pool. this can be done with a swale or dam. some pictures of the situation would help and we can give you a recommendation.
    Dan
    9,000 gallon in-ground Saltwater pool, plaster, cartridge filer, 1.0 hp pump, Hayward T-15 SWCG, TF-100
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    Mod Squad JVTrain's Avatar
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    Re: Diverting rainwater away from pool

    Quote Originally Posted by Skitch View Post
    Sounds like you need some grading done to your yard. You want a swale behind the pool to divert the water away. I don't think a french drain as suggested by JVTrain is going to be enough.
    You're probably right! Pictures and even an estimate of grade/angle would help. You could even get a landscape contractor out and get their opinion. Usually that's free!
    Joel - TFP Moderator - Minnesota - **Become a TFP Supporter!** Helpful Links: ABCs of Pool Water Chemistry - SLAM Procedure - Chlorine/CYA Chart
    40x20 Pool: 32K Gallons * Vinyl * Bleach Chlorination * Hayward S270T Sand Filter * Pentair SuperFlo 1 HP * Teledyne/Laars Heater * AquaVac Tigershark * TF-100 w/ SpeedStir
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    Mod Squad kimkats's Avatar
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    Re: Diverting rainwater away from pool

    There is so much talent on this board I bet we could come up with something that is even pretty! Lets see those pics!

    Kim
    TFP Moderator 33x52 round AG 25,600 gals Sand Filter 1.5hp Pump - 2 Speed, SLAM, Pool School, Recommended Levels, Recommended Chemicals, Pool Math, Chlorine/CYA Chart, TF-100 Test Kit

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    Re: Diverting rainwater away from pool

    This is after my first SLAM when this happened last month: Before Storm

    Video Explanation: Video Link

    I figured a video would do a better job than a lot of photos with text. Let me know your thoughts or if I should go into more detail with anything.

    Originally I thought about running a pip down the side of the fence but it would have to be pretty big pipe with the large amount of water flow we got. I wish I had a video of the storm and the water pattern, but I was to busy trying to drain the pool and do my best at keeping some of the dirt out.
    23,000gal IG plaster, Sand filter

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    Mod Squad kimkats's Avatar
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    Re: Diverting rainwater away from pool

    The before pic makes it hurt even more

    I am going to keep this post bookmarked and watch the video a couple of more time. THAT was a good idea to do the video.

    Now that we have the video we can really tell what it what with your pool. I was seeing a HUGE hill that would just push the water into your pool/yard. BOY was I wrong! LOL

    Thinking and will get back with you.

    Kim
    TFP Moderator 33x52 round AG 25,600 gals Sand Filter 1.5hp Pump - 2 Speed, SLAM, Pool School, Recommended Levels, Recommended Chemicals, Pool Math, Chlorine/CYA Chart, TF-100 Test Kit

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    Re: Diverting rainwater away from pool

    Obviously, you need to divert the water. Those railroad ties and the rock the previous owners put in was an attempt to do that.

    It may have worked for a while but is silted in now and doesn't "absorb" the flow like it was intended.

    Where is the source of the water? The video doesn't show that well at all.....I assume it is from your neighbors yard.

    Do you have property behind the fence that is behind the RR ties?

    It may be as simple as cleaning out that drain bed that was established. show some picture of the slope that carries the water into your yard.
    Dave S.
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    Re: Diverting rainwater away from pool

    What you are looking for is called a French Drain. If you youtube it, you should be able to find a number of great ideas. But basically, it's dig a trench put in some gravel put in some drain tile with a flexible pipe on the end. More gravel. Top with some soil and plants. Extend flexible to where you want the water to go.

    Sorry about the double suggestion. I'm at work and sometimes not all of the posts come through.

    Anyway, there is no reason this wouldn't work. Just need to figure out how wide to make it to be able to handle the volume of water you get.
    Bob - Palm Beach by San Juan Pools. approx 5000 gals., Pentair 320 cartridge filter (all new guts installed by me), Goldline SWG, 'New to me' Kreepy Krauly Sand Shark, Intermec 104 Timer Test kit: TF-100 w/Speed Stir

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    Re: Diverting rainwater away from pool

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    Re: Diverting rainwater away from pool

    If the neighbor's yard drains into your yard, check into whether it's something they did to alter the grade on their property that is causing the issue. I don't know what the laws are like where you live, but most places I know about do not allow properties to be graded to drain into adjoining properties. If it's just the natural lay of the land that's one thing, but if they did something the cause the flow onto your property it doesn't seem right for you to bear the expense of fixing it.
    20k gal. IG plaster w/spa. 2 HP Aqua-Flo "A" pump, Hayward DE6020 filter. "The Pool Cleaner".

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    Re: Diverting rainwater away from pool

    I'm going to have to disagree on french drains...we just went through this route and it didn't work. French drains are good for removing standing water but not moving water. For the French drain to work you'll have to create a trough wherever the pipe is to hold the water. Otherwise the water just rolls right over on its way to the lowest point. We have a moderate hill but our problem is our front yard neighbors yard and both house downspouts feed into this hill. The amount of water and the velocity render a french drain useless.

    So here's what we are doing. We routed both houses downspouts to underground pipes to back of property. We put a retaining wall with French drain at bottom of hill before pool but again there was so much water it began to follow wall and go around to side of pool. So here we instslled catch basins to pipes to back of property. Finally we are installing two sets of catch basins at top of hill to catch all runoff from front yards before it hits hill and gathers speed. It's a pain and we've had two mudslides into our new pool so I know what you're going through.
    18' x 38' Pool, 3' to 8' Depth
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    Re: Diverting rainwater away from pool

    Quote Originally Posted by robertmee View Post
    So here's what we are doing.
    Exactly my issue Robertmee. I looked into a french drain and you are correct, that would only be good for standing water. There is no way it could keep up with the flow of water I got the past two HUGE rain storms we got. To give people an idea, it filled up two inches of my pool in two minutes causing it to over flow. My pump was even set to waste and it could not keep up with how fast it was coming in.

    Do you have any pictures of what you are doing Robertmee? I defiantly need to build a higher wall than the ties that are in place now and route water else where.

    Quote Originally Posted by duraleigh View Post
    Where is the source of the water? The video doesn't show that well at all.....I assume it is from your neighbors yard.
    The part where the ties and rock bed are, the source of the water comes from the neighbors on the other side of that fence. I don't believe they did anything that caused the water to flow like this, it was just how the homes were built. Its a good sized hill. Even if the neighbors did something, I have no idea. I just moved in a month ago.

    Quote Originally Posted by duraleigh View Post
    Do you have property behind the fence that is behind the RR ties?
    No I do not, the fence was built on the property line.
    Quote Originally Posted by duraleigh View Post
    It may be as simple as cleaning out that drain bed that was established. show some picture of the slope that carries the water into your yard.
    I'll get some better pictures when I get home tonight.

    Quote Originally Posted by kimkats View Post
    The before pic makes it hurt even more
    Yeah, it hurts.
    23,000gal IG plaster, Sand filter

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    Re: Diverting rainwater away from pool

    Quote Originally Posted by Death Dream View Post
    Exactly my issue Robertmee. I looked into a french drain and you are correct, that would only be good for standing water. There is no way it could keep up with the flow of water I got the past two HUGE rain storms we got. To give people an idea, it filled up two inches of my pool in two minutes causing it to over flow. My pump was even set to waste and it could not keep up with how fast it was coming in.
    Assuming about 600 square feet of pool surface area, that's about 375 gallons per minute into the pool. Is the flow when it rains more of a sheet flow, or is there a creek/river that forms?
    20k gal. IG plaster w/spa. 2 HP Aqua-Flo "A" pump, Hayward DE6020 filter. "The Pool Cleaner".

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    Re: Diverting rainwater away from pool

    Quote Originally Posted by sbcpool View Post
    Assuming about 600 square feet of pool surface area, that's about 375 gallons per minute into the pool. Is the flow when it rains more of a sheet flow, or is there a creek/river that forms?
    During a normal rain storm, it forms a creek and just goes down the concert. That is why there is a dirt path on the video. It will normally just go around the pool. However, these heavy storms last more than an hour long. The city actually got 7 inches of rain once it was all said and done. On this storm, it was more of a sheet flow, going over the railroad ties, around them, through the cracks, any way it could. Then it would sheet flow right into the pool.
    23,000gal IG plaster, Sand filter

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    Re: Diverting rainwater away from pool

    If the rain was coming at 2" per hour for the two minutes you describe, that means an area of about 18,000 - 45,000 square feet (depending on the surface material) is draining into your yard. 7 inches of rain over 18,000 square feet is 78,000 gallons of water. You aren't going to hold that with any wall. You'd have to build something three times as big as your pool.

    According to this paper, if you want to be able to handle a 100-year storm you need to design your solution with a capacity to drain up to 600 gallons per minute (assuming 18,000 square feet of drainage area). If it were me, I would build a retaining wall and drains capable of carrying that amount of water. That could be as little as two 4" pipes or as much as four depending on the slope of the drainage pipe and the coefficient of runoff (i.e., grass, concrete, etc.).
    20k gal. IG plaster w/spa. 2 HP Aqua-Flo "A" pump, Hayward DE6020 filter. "The Pool Cleaner".

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    Re: Diverting rainwater away from pool

    Did you use a Realtor to purchase this home and if so was the a Property Disclosure?
    18' x 36' saltwater inground vinyl pool

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    Re: Diverting rainwater away from pool

    Quote Originally Posted by ouachita View Post
    Did you use a Realtor to purchase this home and if so was the a Property Disclosure?
    These are almost impossible to enforce. I had many problems with my last purchase and the seller maintained that they didn't know about any of the problems I discovered. Water pools 6 inches deep against the house when it rains? "I didn't notice that." Sprinklers don't work at all in some zones, other zones have broken pipes that flood the streets? "I didn't notice that." Pool plaster delaminating all over the place? "I didn't notice that."

    The only way you win against that is to prove they did notice it and intentionally failed to disclose it. Do you know how hard it is to prove a person knew something when they claim they didn't?
    20k gal. IG plaster w/spa. 2 HP Aqua-Flo "A" pump, Hayward DE6020 filter. "The Pool Cleaner".

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    Re: Diverting rainwater away from pool

    Pm me your email address and I can send you pictures of what we've done to date...the two upper drains are going in tomorrow after a failed attempt at an upper french drain. And our retaining wall is being extended. But I can show you what we are planning.
    18' x 38' Pool, 3' to 8' Depth
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