The desire to acquire their own source of water for many owners of suburban areas is quite logical and natural. The only stumbling block in resolving this issue is determining what is still better - a well or a well?
Builders who perform well digging services are ready to give a sea of arguments, confirming that the well is a brilliant invention that will function properly for five decades. Masters who specialize in well drilling convince us that a well is the best option for a hydraulic structure.
Each of these two methods of water production has its pros and cons, the main of which we will consider in this article. Why do we compare the complexity and cost of constructing each of these options for water intake, compare the service life and frequency of preventive cleaning.
And also talk about the quality and volume of produced water. All these factors will help you determine the best way to extract water, the most suitable for your living conditions and which can satisfy all your needs.
Design features of a well and a well
The well is a hydraulic structure in the form of a vertically dug cavity up to 30 meters deep and a shaft diameter of over 70 centimeters, the walls of which are reinforced with reinforced concrete rings.
In the soil layers, several aquifers occur at different depths. Upper - referred to as the tip, is located 2-3 meters from the surface. Its water is quite muddy and dirty, because it feeds on drainage and storm drains that penetrate through the soil and industrial deposits.
The water produced from this layer is used for watering plants. A little deeper in the sandy aquifers lies groundwater. Of these, they extract water during the arrangement of a drinking well.
The main difference between a well and a well is depth: if a well buried 30 meters deep in the ground is deemed to be deep, then for a well this is probably the minimum mark
A well is a specially equipped vertical channel equipped with pipes with a diameter of up to 110 mm, which is designed for the extraction of drinking water from an interstratal aquifer
There can be several aquifers in the earth, and they alternate with water-resistant strata. To produce water from the first and second sandy horizons, Abyssinian wells are built - small-diameter wells that are not drilled during installation, but that the soil layers are pierced with an inch rod, like a needle.
At a depth of 200 meters and below are limestone layers, referred to as artesian. They contain large reserves of water than the same sand formations.
The key difference between an artesian well is that it produces water that lies between two dense layers.
Since the price of such a hydraulic structure directly depends on the depth of the structure, and its productivity is ten times higher than the needs of one family, artesian wells are most often installed collectively: one on the street or on the whole village.
Rich in minerals useful for human health, artesian water is pure from nature, since it is perfectly protected by the thickness of the water column from wastewater and precipitation
Comparative water withdrawal cost
For many owners, the question of choosing which is better is a well or a well, far from idle. After all, it is he who determines the cost of the construction and maintenance of the water production facility.
When calculating the estimated estimated cost of water intake, a number of parameters should be taken into account:
- earthwork per each running meter in depth;
- volume of materials to strengthen the walls of the penetration;
- frequency of maintenance of the structure.
As calculations show, at the cost of costs, including all installation work and maintenance of the erected structure, a well is cheaper.
Due to the low cost of excavation, which can be done without involving heavy machinery, many summer residents, gardeners and village residents can afford to install a well.
A summary table for comparing the estimated estimated cost allows you to choose for yourself the most optimal option: install a well or drill a well
The estimated cost of completing the well varies from 30 to 40 thousand rubles.
It includes:
- Installation of a bottom filter (4-5 thousand rubles).
- Filtration gravel dumping (1-1.5 thousand rubles).
- Outdoor house for the head (from 7 thousand rubles.).
- Submersible pump with installation (15 + 7 = 22 thousand rubles).
Well construction without taking into account the laying of communications from the water intake point to the consumption points will cost about 100 thousand rubles. The cost depends on the season, the depth of drilling and the equipment used. In more detail, the main factors affecting the final cost of the construction of the well, we considered in this article.
The well’s package includes many components, including a pump, a caisson, control devices and a hydraulic accumulator, the cost of which amounts to tens of thousands of rubles
The price of a pump for a mine well also comes out an order of magnitude cheaper in comparison with the pumping equipment necessary for equipping a well.
Preventative Cleaning Frequency
Well preventive maintenance is carried out annually. The price of such an annual sanitary treatment, carried out by the efforts of masters specializing in this field, is about 6 thousand rubles.
The state of water in the well must be constantly monitored, checking its organoleptic and chemical characteristics in laboratories of environmental services
When carrying out a thorough cleaning of the walls from silting, which is carried out once every five years, you will have to spend another 7 thousand. If it is necessary to replace the bottom filter, the cost of work doubles.
But flushing the well in this regard is cheaper. With proper well construction, maintenance of a hydraulic structure is reduced only to monitoring the operation of the system, since it does not need to be cleaned annually.
Preventive cleaning of the system is performed every five years. The cost of the service, depending on the depth of the structure, varies from 6 to 50 thousand rubles.
Water purification from the well is carried out by installing filters. It’s easy to take care of the filtering elements of the structure: they only need to be cleaned and replaced as necessary.
Features of installation of structures
In construction technologies and requirements for the placement of mine and tubular wells, there are also a number of significant differences that affect the choice of the type of water source for arranging suburban estates.
Placement Requirements
When arranging a well, it is important to maintain a distance from buried septic tanks, sewers and surface pollutants. Taking into account the current sanitary standards, it should be at least 50 meters to cesspools, toilets and stockyards located on the site of septic tanks.
Keeping the distance between the structures will help to avoid accidental ingress of water from the well, household waste and sewage
Choosing a place for drilling a sand well, this distance can be reduced to 30 meters, without worrying that surface water contaminated with domestic wastewater will reach the point of intake.
The closed design, the walls of which are made of durable moisture-resistant concrete rings, prevents the penetration of contaminated water and debris into its cavity. We talked more about the design of water supply wells on the site in this material.
The requirements for arranging an artesian well are more stringent. Industrial enterprises and other sources of chemical contamination should be removed to a distance of more than 300 meters from the location of the well.
The distance to garbage dumps, burial grounds and centralized sewage systems should be at least 200 meters. Houses and farm buildings and must be removed at least 30 meters.
Obtaining permission and terms of construction
When arranging a well from the first aquifer to the depth of the aeration zone, which is 20 meters, no permits are required. You can determine the horizon of the aquifer experimentally, or by applying for the issuance of geological information of your area in the territorial fund.
When planning to drill a well for the extraction of deep waters, the horizon of which exceeds 20 meters, before starting work it is necessary to obtain a package of permits.
To obtain the right to drill an artesian well and use the water extracted from the bowels of the earth, a project is developed that describes:
- what rocks the well crosses;
- at what depth are the filters;
- whether pipe cementation is provided and to what depth.
The license is issued only for wells intended for the selection of artesian water. Together with the license, the owner of the well receives an agreement, thereby committing himself to submit statistics to the statistics, and to pay taxes to the tax authorities.
When drawing up the project, water supply schemes are developed, and also the flow rate, the effect on groundwater and the calculation of sanitary protection zones are calculated
In the passport attached to the documents for the well, all the necessary characteristics will be displayed:
- coordinates of the location of the well;
- immersion depth;
- dynamic and piezometric levels;
- dimensions of casing used;
- construction performance.
The process of drilling a well will take less time than carrying out procedures to coordinate the project in various instances. It takes on average one to two days to equip a sand well and a hydraulic structure like a needle. We recommend reading in more detail about well drilling methods and their features.
Drilling an Abyssinian well can also be done on its own, using a manual method using a screw drill with a diameter of 150 mm.
For drilling an artesian well, it is better to attract professionals, concluding a contract with them for work. After all, any deviation of the barrel from the vertical during the installation process may result in the need to redo the work again.
When installing the well, there is no need to issue construction permits. According to article 19 of the Law on Subsoil, underground structures are allowed to build underground structures not more than 5 meters deep.
A well shaft is a more complex structure with a depth of 5 to 30 meters, the construction of which will require at least a week
The complexity of the construction of the well lies mainly in the laborious process of the mine - it has a large number of structural parts. So, when erecting the walls of a concrete trunk of a structure 30 meters deep, 33 reinforced concrete rings will be required, with a product height of 90 centimeters, and the same number of joints for their connection.
For comparison: when arranging wells, pipes are used, the length of the segments of which is 2.06 meters. Consequently, they also have fewer joints.
The only thing - after the construction of the well, it is advisable to officially register the material object by entering it into the site plan. BTI imposes no sanctions on the unauthorized construction of a well. The technical plan of the site is the only official document on which the well will be marked.
Operational period of constructions
The life of the well is from 30 to 50 years.
Stable operation of downhole hydraulic structures is on average:
- “Abyssinian needle” - from 5 to 7 years;
- sand well - up to 15 years;
- artesian for over 50 years.
The life of both types of hydraulic structures depends on the quality of the arrangement of the system, the regularity of maintenance, the soil structure of the area and the chemical composition of the produced water.
A graph will help to provide a comparative analysis of the operational period of each of the above sources of water intake.
Volume and quality of produced water
A significant parameter when choosing between a well and a well is also the maximum amount of water "produced" from the source. Some mistakenly believe that the water in the well is much less than in the well, arguing that the well has a much larger cross section than the same well. This is actually not the case.
Features of water intake from the well
Due to the fact that the well is filled only with the waters of the Quaternary sediments, the magnitude of the inflows of the hydraulic structure is limited to up to 0.5 cubic meters / hour. To service a small plot with a house of this volume is enough.
But when arranging a large area plot, including the cost of watering green spaces, filling the pool and other household needs, this amount will be clearly small. And, as practice shows, the volume of water in a well is restored very slowly, in some cases up to several hours.
If we focus on water quality, then the well wins in this regard. When arranging a well, it is impossible to ensure complete waterproofing of the structure, since it is necessary to create conditions for natural flow through the bottom.
Leakage of the walls of the structure is fraught with the fact that during the operation of the intake, the aquifer will mix with groundwater
Although the water produced by the well does not have a taste of “rust” and chlorine, it will most likely contain impurities of groundwater after heavy rain or high water. We wrote about water purification from a well here.
The specifics of water intake from the well
Spring water has always been considered the cleanest and most useful. Due to the fact that the well draws drinking water at a great depth, it does not mix with horse melt and flood waters. And even after heavy rains, the water produced from the well does not become cloudy. Water in the well is quickly replenished.
The magnitude of the inflows for downhole hydraulic structures is on average:
- "needle" - 0.5 cubic meters per hour;
- sand well - 1.5 cubic meters / hour;
- artesian - 5 cubic meters per hour.
A high inflow is characteristic only of aquifers located as deep as possible from the surface. The stock of the aquifer is practically inexhaustible. Complete drying of the well is impossible even with regular operation of the structure using a powerful pump.
The water purified from impurities is extracted from borehole-type installations located on limestone or a sand aquifer, which are placed between the water-resistant layers
It is worth noting that some well owners complain that the water produced in this way has a slightly metallic taste. But this effect is observed when pipes made of low-quality metal were used during the installation of the structure.
The well selection priority is easily explained by the high tightness of the structure, which is achieved due to the tight fit of the casing to the body of the structure. This prevents the mixing of groundwater and the aquifer.
In addition, borehole type water intakes are equipped with reliable filtration systems, due to which a high degree of water purification is achieved. We talked more about water purification from a well in our other article.
Insects and small amphibians, which during the process of decay can release toxic substances, can contribute to the multiplication of pathogenic microorganisms through a narrow throat closed with a cap.
Tips builders on choosing the best source of water:
Summing up, it is worth noting that it is better to equip a mine well in summer cottages intended for seasonal residence, provided that the water is located only a few meters from the ground level. With a small flow of water, which is mainly spent on household needs and watering plants, excess moisture will accumulate in the mine.
In addition, equipping a well in the country, you will always have the opportunity to raise water from a depth manually, which is so important in conditions of frequent power outages.
When arranging plots intended for year-round use, the depth of the water on which is sufficiently large, it is worthwhile to prefer well drilling. It will have to be spent on its arrangement at first, but in the process of continuous operation of the structure, the cost fully pays off.
Do you still have questions after reading our article or can you not decide on the optimal method of water intake for you? Ask your questions, describe your situation in detail in the comment block below - our experts and other visitors to the site will try to help you.