Agricultural farm pool with geomembrane sheets
According to the amount of cultivation in summer and rainfall in all seasons
And the increasing demand for water and the lack of water resources, the agricultural water storage pool with geomembrane sheets brings to the attention of farmers the importance of protecting these vital resources.
Why is it better to build an agricultural pool with geomembranes?
Geomembrane sheets are almost 100% impermeable, while stone and cement concrete have low permeability. Changing the methods of transferring water from old to new will be effective in preventing water wastage in water distribution and storage networks in rainy or snowy seasons and using this source for hot seasons and making it easy to get water at any time of the day or night. .
9 steps for agricultural storage or construction of geomembrane agricultural pools:
Choosing a place for an agricultural pool.
Calculation of water volume and geometric shape of agricultural water storage ponds.
Excavation / embankment and standard floor construction of agricultural water storage pool.
Selection of suitable types of geomembranes and geotextiles for agricultural water storage pools.
Determining water inlet/outlet points for agricultural water storage pools.
Covering geomembrane and geotextile along with their welding.
Drawing a protective fence for the agricultural water storage pool.
Dewatering of the agricultural water storage pool.
Final control and filling of agricultural water storage pool trench.
Agricultural pool
Locating the agricultural pool
In general, the location of the pool can be determined according to the sources of water supply such as: water pit, river, aqueduct, spring, flood, etc. …) and the method of water output to agricultural land (gravity, pumping, etc.) will be very effective for this choice, the place should be chosen in a way that has the least cost and time for building a pool and directing water to its discharge points and the type The structure of the soil should also be checked.
Calculation of water volume and geometric shape for agricultural pool
After mapping, according to the volume of available water resources such as irrigation rights, we calculate the time of water entering the pool and the volume of water required by the farmer, taking into account the reliability coefficient. .
Also, due to the lack of restrictions for geomembrane insulation in the shape and size of the pool, the calculation of the geometric shape is done according to the lowest cost of excavation or embankment.
Excavation / embankment and construction of the standard floor of the agricultural pool
Proper floor construction has a great impact on the health and longevity of the geomembrane sheet in the pool, and the pool floor is built either by digging a pit and making an embankment, but in both cases, the points that must be observed are:
To prevent the walls from falling, follow the standard slope (1/1) or 45 to 60 degrees of the pool walls.
smoothing and compacting the surface with at least 70% compaction by tamping rollers and collecting gravel and pouring soft materials such as sand.
For the beauty of the geometric shape of the pool and to prevent the walls from collapsing, the walls are lined with bricks and concreted.
Selection of geomembrane and geotextile for agricultural pool
Due to the wide variety of geomembranes and their manufacturers, it is very important to choose the most appropriate geomembrane, and by doing more research, the best quality and standard product is identified along with its reliable manufacturer.
In general, each type of geomembrane sheet with any brand must have a specification sheet along with the GM13 international standard, an operation sheet from the Ministry of Industry, Mines and Trade and a 10-year warranty sheet for a depth of less than 10 meters. A slope of 45 is recommended from a thickness of 1.5 mm of geomembrane, and for a depth greater than 10 meters, a thickness of 2 mm or more is suggested.
Determining the water input/output for the agricultural pool:
Types of piping:
Inlet pipe
outlet pipe
Water overflow pipe
The material of all these pipes should be polyethylene, and as much as possible, we should not work in the pipes inside the pool, and the inlet/inlet pipe should be made of the above items, and if there is clay in the water, we should use the others. The pool or multilayer filter and its outlet should be accompanied by a floating pump (preferably by a mesh chamber made of plastic and aluminum) or a shoe pump.
The outlet pipe should be at a distance of 1 meter from the edges and corners of the floor and be placed inside the hole like a siphon and fixed with 50 cm of concrete around it, which prevents the weld from separating. The pipe prevents any water leakage when the weight of the water causes it to fall from the surface.
If the pipe overflow is needed, it should be installed 10 to 50 cm below the edge of the pool and the diameter of the pipe should be about 25 cm.
Implementation of geotextile and geomembrane layers and their welding
Note that for installing insulation, the weather conditions should be suitable for welding, for example, it should not rain and the temperature should be between 0 and 70 degrees Celsius.
First, we connect the wide protective felt cover of the geotextile with a thermal dryer, and then it is time to use the geomembrane layer.
The edges are placed on top of each other and smooth on the floor and walls of the pool. If the edges are clean and dry, using an automatic thermal welding machine, the sheets are welded to each other with two welding lines at a distance of 1.5 cm.
And that empty space can be used to perform discharge test, air pressure test, spark test for large pools
Creating a protective fence for the agricultural pool
Due to the importance of preventing drowning of humans or other creatures, especially before any water extraction, it is mandatory to install fences and warning signs, and in case of any negligence and any accidents and financial or life losses, the owner will be the beneficiary. and will be found guilty.
The best materials for 6×6 mesh galvanized netting fences, which are produced with 2.5 wire and 2 meters wide.
Or an iron pipe with a diameter of 5 cm (scaffolding pipe) with a corner beam of 6 and a length of 300 cm, with a bending angle of 50 cm above it.
50 cm below that space, it is placed in concrete by connecting at least three branches, and the connection points of the fence are made of rings with a wire scale of 3 or 4 (welding wire) and support pipes that are made if necessary.
Water consumption for agricultural pool
After performing various types of tests by the relevant technician, checking the welding points (if the relevant pipe is applied), and checking the connection connections, we can start draining the pool.
As the first level of water intake, we have to fill the pool from a height of 50 to 70 cm from the floor surface and after two days (so that the geomembrane sheet sits well on the pool floor) we place it. Then for the third and fourth day, considering the amount of water evaporation for each area, check the water lines again.
If the volume of water does not decrease, we perform the next test steps. For these levels, the pool is drained for three levels: 30%, 60%, and 90% of the volume of the pool, and after the sheet sits on the bottom of the pool, water lines are placed. The reason for draining the pool at different levels is to prevent the draining of all the water in the pool, and if there is a problem, it is the hole, and if there is a leak, the holes should be identified and re-welded.
Final control and filling of agricultural pool trenches
During water extraction, a number of soil bags are placed in the edge trench of the sheets so that the sheet moves with the addition of water and is completely fixed on the bottom of the pool bed.
After dewatering the agricultural pond, the trench hole is filled with soil or light concrete, pay attention to the fact that if this trench is filled early, it will cause more strength or tearing of the sheet, which will lead to air flow between the soil and the geomembrane. . Air flow reduces the lifespan of pool insulation and water leakage.
Construction of agricultural pool with geomembrane
Comparison of geomembrane pool with old approaches:
To build an agricultural pool: the latest technology in the world is the use of geosynthetic materials, therefore
Using concrete and asphalt is time-consuming and inefficient due to the following points:
Examples of old methods:
- The need for a suitable substrate:
• Stabilization: which generally requires the combination of cement and sand at a weak level due to the type of substrate
It is muddy and this has no economic justification at this level.
• Strengthening the soil: due to the prevention of bed settlement and eventually cracking
Asphalt cover leakage is the need to strengthen the substrate, which is a big and expensive project
Is. - Increase in costs: decrease in cost: due to the current increase in the cost of bitumen and asphalt, this
Prices have increased several times in recent months. - High permeability: Asphalt, despite its high permeability with the best materials, creates a completely unsanitary environment for aquatic animals, so it is recommended to use geomembranes to have a healthy environment for aquatic animals. .
- Short life: the maximum life of asphalt in dry beds is not more than four years and naturally
Water levels decrease, but compared to asphalt, geomembrane sheets have a lifespan of over 50 years.
It is related to the characteristics of geomembranes - A lot of required implementation time: implementation time: the implementation of the agricultural pool with geomembrane sheets can be up to
1000 square meters per day increased with the team. - High level of leakage: a completely isolated space without any leakage with step-by-step confirmation and testing and implementation
Drainage system to determine leakage. - Without warranty: the possibility of using warranty and project insurance. Today, concrete, asphalt, bitumen, etc. are used more often in agricultural pools or geomembrane pools due to greater economic efficiency, longer life and shorter implementation time. Geomembranes resistant to sunlight
and is much more resistant to cold and heat than concrete, so that the geomembrane can withstand temperatures of +80
and withstand -70 degrees Celsius.
Arin Khak company, with years of experience in the production of geomembrane sheets, is ready to cooperate with you dear ones.
For more information, contact our consultants and get a free consultation from Arin Khak company in this
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