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  1. #1
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    Mistakes to avoid - well drilling in chiang mai

    greetings,

    i am planning a well drilling project on our property in chiang mai for agriculture use.
    we are located on a the slope of a local water reservoir and we have an underground stream fed pond on the property. which we prefer not to use as a water source.

    i followed all the threads on this board and did an extensive reading on the subject both in English and Thai. what i am looking for is personal feedback and stories of your experience in well digging projects, what pitfalls to i should avoid, and any advice you would be willing to share

    thank you !

  2. #2
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    I have been drilling water wells in Thailand for over 40 years and have groundwater maps of all of Chiangmai province, if that is any help. I don't do domestic wells but there is a company on Chotana Rd called L'Analytic who have a good reputation.

  3. #3
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    Quote Originally Posted by Shy Guava View Post
    I have been drilling water wells in Thailand for over 40 years and have groundwater maps of all of Chiangmai province, if that is any help. I don't do domestic wells but there is a company on Chotana Rd called L'Analytic who have a good reputation.
    Excllent post.

    In all these years have you tapped into the ;local psyche tho

  4. #4
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    I have just drilled a well 20 min n/e of mea rim, up a hill, 350m above sea level, needed to go 75m deep n have a constant supply from a 3/4" pipe at a pretty good pressure plenty for my private house but doubt its good enough for commercial use

  5. #5
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    Aircut... If you have an aquifer feeding your pond, you could likely drill a shallow well yourself and not affect the level of the pond at all. We had the same situation and had two wells, 4 meters and 8 meters deep. Both could supply 18 gallons a minute which was the maximum capacity of our junk pump. We used the 8 meter well for the house water as it was cold and clear. Here is an old thread on our well drilling fun.

    http://teakdoor.com/construction-in-...ling-idea.html (Well Drilling Idea)
    Press On Regardless

  6. #6
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    hello Thailazer
    the property is located at +454 meters above sea level. all the nearest water reservoirs were emptied last year for cleanning and extra digging, so we had to use the pond water for irrigation. the water filling rate was slower than what we pumped out...and we noticed a 15cm drop in the wster level after the rainy season, comparing to last year. I talked to geologists and their opinion is that the pond is fed by subsoil water, they estimate the ground water bed to be below a bed rock at about 80 meters down, based on charts and maps of the area. From what I understand the subsoil water level fluctuate quite a lot between the dry and rainy season while the deep underground water fluctuate much less....Since we need water for agriculture (until the reservoirs are filled again) and water for (future) household use... I have applied for a license to drill a 4" well at a cost of 100K. the contractor is a licenced company that drilled in that area and they offer 2 years free well service. it seems that once we hit water we will have to apply for a second license to use the water after the natural resources department will run water quality test.

  7. #7
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    I've been extensively well-drilling Thai maidens for eva!

    If you tap them just right, in their 'reservoir'... you can unleash a squirter...

    When drilling, to avoid pitfalls... always drill the pinky - never the stinky...
    Last edited by NZdick1983; 13-11-2015 at 10:49 AM.

  8. #8
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    Quote Originally Posted by aircut View Post
    hello Thailazer
    the property is located at +454 meters above sea level. all the nearest water reservoirs were emptied last year for cleanning and extra digging, so we had to use the pond water for irrigation. the water filling rate was slower than what we pumped out...and we noticed a 15cm drop in the wster level after the rainy season, comparing to last year. I talked to geologists and their opinion is that the pond is fed by subsoil water, they estimate the ground water bed to be below a bed rock at about 80 meters down, based on charts and maps of the area. From what I understand the subsoil water level fluctuate quite a lot between the dry and rainy season while the deep underground water fluctuate much less....Since we need water for agriculture (until the reservoirs are filled again) and water for (future) household use... I have applied for a license to drill a 4" well at a cost of 100K. the contractor is a licenced company that drilled in that area and they offer 2 years free well service. it seems that once we hit water we will have to apply for a second license to use the water after the natural resources department will run water quality test.
    Sounds good. We used to pump water out of the pond and its level would drop. Pumping out of a shallow well only 20 meters away though had no effect on the level of the pond. Best of luck on the well and it should yield good water.

  9. #9
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    Quote Originally Posted by Shy Guava View Post
    I have been drilling water wells in Thailand for over 40 years and have groundwater maps of all of Chiangmai province, if that is any help. I don't do domestic wells but there is a company on Chotana Rd called L'Analytic who have a good reputation.
    Hi Shy,

    Just saw your 2015 post. Where I might buy a groundwater map of Chiang Dao area?

    Many thanks

  10. #10
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    There is a government interactive map of the area with major borehole information here:

    | gmis.longdo.com

    you have to type in the location of your area (in thai) in the search box:

    ต.เชียงดาว is chiang dao

    Press enter (blue left hand button next to search box), this will then centre the map on your area.

    Then you can click the icon on the map legend (top left hand side), here's a screen grab, I have marked the button with a red arrow:



    If you zoom in to your local area, icons appear showing what wells/boreholes have been sunk nearby (if any), depth and width of pipes, plus use and water type are indicated. It's a bit of a fiddle, but hopefully you'll get some info.

  11. #11
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    Jonny. Thanks so much for taking the trouble to post this very useful information.

    Apologies for my late reply.

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