How to find out the debit of the well - the basic rules for

Many developers in the device of water intake do not pay enough attention to this issue, therefore, subsequently a lot of problems and concerns arise. Instead of a normal water supply, you get a headache and try to figure out how to rock a well with a small debit, although according to the documents everything should be fine.

The fact is that the specialists who pierce a well do not always treat the calculations responsibly. And it is possible to check the correctness of the indicators only after putting the house into operation, which most often occurs after six months or a year, or even after several years. Only then problems appear.

You can check the calculated indicators provided to you, with your own hands using a simple chart.

This chart takes into account the following indicators:

• Borehole diameter
• The type of rocks of the aquifer.

In the figure, numeral 1 marks gravel sands, numeral 2 — coarse sands, numeral 3 — medium-grain sands, and numeral 4 — fine-grained sands.

What is meant by the value of debit wells

To understand the essence of the issue, it is necessary to understand the features of the water supply system. The principle of operation is quite simple - the water enters the production pipe from the aquifer, from where it is pumped out with the help of a pump. During prolonged operation of the pump, the aquifer may not have time to fill the pipe.

It is for this purpose that the indicator of the limiting volume of water is used, which is capable of giving up an aquifer in 1 hour. It is called debit and has nothing to do with the accounting indicator.

Many are interested in how to calculate the debit of a well as accurately as possible. In fact, without deep knowledge in this area and the availability of specialized equipment, it is very difficult to do this. Even if you have everything you need, it will take a long time to determine.

But the resulting value will reflect the real situation only during the measurement period. Aquifers can vary considerably in volume depending on the season, weather conditions and many other factors. Therefore, even a specific value is not a constant indicator.

Specialists involved in drilling, often do not know how to determine the debit of a well with minimal deviation. Therefore, when you make a passport put an approximate figure, which takes into account the capabilities of the equipment of the company and your needs. You need to tell how much water you plan to consume (based on the pump power).

In fact, you should not dwell on the accuracy of measurements, because by itself an indicator of how much water can be produced with maximum use is not so important. It is much more important that there is enough water for your needs and no matter how close this figure is to the maximum, you still won't notice the difference.

The required performance is very simple to calculate:

• The total number of cranes that will be installed in the house, bath, summer kitchen and other places is calculated.
• It is based on a figure of 0.5 m. ³ per hour is the maximum consumption of one point.
• The number of cranes is multiplied by 0.5, the resulting figure will be the maximum performance (for example, if you have 8 cranes, then a 4 m pump is needed³ at one o'clock). Naturally, all the taps at the same time are unlikely to work, so this figure with some margin.

If the system will be consistent with this indicator, you will never have the unpleasant question of how to increase the debit of a well.

Dynamic and static water level

It should be understood the difference in these two concepts, consider this issue in more detail to clarify all the nuances.

Static level

It is quite simple to define it:

• Initially, drilling work is carried out. Next is washing.
• After that, it is necessary to let the water settle for at least 24 hours, and even better for two days.
• Next, measure the level of water that has accumulated during this time in the production pipe.

Note! If the well is made in accordance with the technology, the static water level will be significantly higher than the point of water intake. If it is not, then the well is not very well made.

Dynamic level

In a simplified debit measurement, the following actions are performed and the following values ​​are revealed:

• Two water intakes with different intensity are produced. As a result, the level in the production pipe will decrease; these indicators will serve as the basis for calculating the dynamic level.
• It should be understood that with continuous water intake, its level will constantly decrease, and if the volume consumed does not exceed the debit, the level will stabilize at a certain point - this is the real dynamic indicator.
• Naturally, the use of equipment of different power implies different values ​​of the dynamic level of the well.

Debit calculation

So, the debit guide will help you understand the billing system.

Let's take a specific example: let's say the well has a depth of 100 meters, after the water has settled, the level in it is 80 meters from the surface, that is, the height of the column is 20 meters. In an hour, 2 cubic meters of water were pumped out of the well, after which the water level was 84 meters from the surface.

All data is entered into the formula:

This is the easiest way to determine the debit of a well.

Important note! All values ​​are measured in meters from the surface. That is, the more the water level falls, the greater the dynamic level indicator will be.

Increase debit, is it possible?

Often developers ask a question how to increase the debit of a new well? In this case, you should contact the company that carried out the work. If the declared volume does not correspond to reality, they are obliged to work to improve the indicators.

There may be two options:

• Inaccurate horizon hit.
• Poverty of the horizon with water, in this case only the device of a new well will help.

Let us examine how to increase the debit of the well, if earlier it was noticeably higher:

• The first step is to clean the production pipe.
• Also, the well filter must be cleaned.
• It may happen that the pump is to blame; a drop in the dynamic water level will help determine this. In this case, the pumping equipment of the well should be replaced, and it is better to choose a good option, the price is not much different, but the problems will be much less.

Conclusion

Despite the apparent complexity, it is possible to calculate the debit of a well separately from the specialists. The main thing - the availability of correct data. The video in this article will explain in more detail some of the nuances of this issue.