Thanks. Some commenters have brought up a few good points about how this method does not provide accurate flow rate. But I think that even just being able to quickly estimate how much water is coming into a well every minute or hour, as well as knowing how to estimate storage capacity, can be helpful info for the average home owner.
If I took the top of my well pipe off I would have a geyser. It's 180 ft deep Artesian well. I get upwards of 15 to 20 gallons a minute out of a inch and a half line. I'm looking to make a Micro Hydro power turbine
So you calculated recharge rate there. Flow rate is calculated as you pump and drawdown the water level in your well. After 4 hours, was your water level still rising or was it at the static water level? How do you know it stopped riding to static at 4 hours and not 3? Would change your calculations significantly. My .02 is I think you’d get a more accurate “flow rate” by pumping and monitoring drawdown.
You gotta flow test your well to know for sure its output. Then as you pump, you check "Draw Down" or water level every 15 minutes until it goes dry or at least until water level is stabilized. Or for the maximum time you want to pump. When level is stabilized check Flow Rate (Time to fill 5 gallon bucket) again for GPM. Then you know all you need to figure capacity over time. Or "How much water can I expect at max flow for how long..
Its alway expressed as Flow Rate in Gallons Per Minute. Not in figures as how long can I expect a certain flow rate. Thats the well owners problem to figure out.
Dear Sir, Very informative. But, could you give some published work which made use of this technique and found success. The problem here is deciding the time at which we need to go for the second measurement which is very sensitive and the flow rate varies at different points in the same terrain due to different intensity of fracture system. Please comment on this. Thank you
Just passing on an easy method my well contractor used. I’ve learned a lot about our well and others over the years. Talked to quite a few people in my town about their wells too. One thing I know is that it’s not always an exact science. Have to figure out what works best for your situation and go with it.
Vladimir Fallas - it’s just an approximate measure, but yes. Some wells may recharge at a slightly different rate from one day to the next. This might be especially true if you’re pulling water from loose material. Most of the wells in my area draw from dense sedimentary shale, so the flow rate is fairly constant.
@@tms2568 3 years old comment.. but what I think he means is between the different levels. For example, if my well went from 50 foot water depth to 40ft in 30 minutes but took an hour to get from 40ft to 30ft and another 2 hours to get from 30ft to to 20ft, thats a big difference. You can pump a good amount per minute if you keep the water above 50 and below 40 for example, whereas if you wait till water level hits 20ft, you are pumping quite a bit less per minute since the last 20 feet take so long.
Vielen Dank!
Dank ihrer Erklärungen könnte ich einfach verstehen wie man den Durchfluss misst.
Excellent video! Thank you!!! You just saved me tons of time. ;)
Thank you very much for the information!!!!
Oh my God you are the best!This is what I was looking for .Thanks baby I love you!👏👏👏
Great explanation!
Thanks. Some commenters have brought up a few good points about how this method does not provide accurate flow rate. But I think that even just being able to quickly estimate how much water is coming into a well every minute or hour, as well as knowing how to estimate storage capacity, can be helpful info for the average home owner.
If I took the top of my well pipe off I would have a geyser. It's 180 ft deep Artesian well. I get upwards of 15 to 20 gallons a minute out of a inch and a half line. I'm looking to make a Micro Hydro power turbine
So you calculated recharge rate there. Flow rate is calculated as you pump and drawdown the water level in your well. After 4 hours, was your water level still rising or was it at the static water level? How do you know it stopped riding to static at 4 hours and not 3? Would change your calculations significantly. My .02 is I think you’d get a more accurate “flow rate” by pumping and monitoring drawdown.
good stuff
You gotta flow test your well to know for sure its output. Then as you pump, you check "Draw Down" or water level every 15 minutes until it goes dry or at least until water level is stabilized. Or for the maximum time you want to pump. When level is stabilized check Flow Rate (Time to fill 5 gallon bucket) again for GPM. Then you know all you need to figure capacity over time. Or "How much water can I expect at max flow for how long..
Its alway expressed as Flow Rate in Gallons Per Minute. Not in figures as how long can I expect a certain flow rate. Thats the well owners problem to figure out.
.5 gallons per minute is an order of magnitude below where it should be. What gives?
Flow Rate and Recharge Rate are TWO different animals.
Dear Sir, Very informative. But, could you give some published work which made use of this technique and found success. The problem here is deciding the time at which we need to go for the second measurement which is very sensitive and the flow rate varies at different points in the same terrain due to different intensity of fracture system. Please comment on this. Thank you
Just passing on an easy method my well contractor used. I’ve learned a lot about our well and others over the years. Talked to quite a few people in my town about their wells too. One thing I know is that it’s not always an exact science. Have to figure out what works best for your situation and go with it.
must not be any plastic cable guards in that well.
There are. The well diameter is big enough that they can be avoided.
But you would be assuming that the recharge rate is linear, right?
Vladimir Fallas - it’s just an approximate measure, but yes. Some wells may recharge at a slightly different rate from one day to the next. This might be especially true if you’re pulling water from loose material. Most of the wells in my area draw from dense sedimentary shale, so the flow rate is fairly constant.
@@tms2568 3 years old comment.. but what I think he means is between the different levels. For example, if my well went from 50 foot water depth to 40ft in 30 minutes but took an hour to get from 40ft to 30ft and another 2 hours to get from 30ft to to 20ft, thats a big difference. You can pump a good amount per minute if you keep the water above 50 and below 40 for example, whereas if you wait till water level hits 20ft, you are pumping quite a bit less per minute since the last 20 feet take so long.
Sir plz make a video on how to find the yield of well
Common method to figure Gallons Per Minute is. Time it takes to fill a 5 Gallon bucket. Say 10 seconds=30gpm. 1minute to fill= 5gpm.
This is so wrong. I do this for a living. Drilling and pumps