Maintenance and rehabilitation of water wells

Water wells require regular maintenance to ensure adequate water flow and optimal water quality.

Maintenance and rehabilitation of water wells

As a well ages, the rate at which water is pumped (commonly referred to as well productivity, flow, or performance) increases.
It tends to decline especially in wells that were not properly developed when first drilled.

This article briefly describes common well problems and discusses prevention and rehabilitation measures.

Water well maintenance and rehabilitation

Water wells require regular maintenance to ensure adequate water flow and continued safety of drinking water to ensure water quality
Well water must be tested annually for total coliform bacteria and E. coli by state-certified testing laboratories.
Water wells should also be inspected annually for visible signs of damage

or contamination around the well free of debris or items that may contaminate the water supply.

A water well completion report or record (if you have one) which should include information such as water well depth,

drilling and construction date (including casing, grouting and screening specifications), water well productivity or flow rate in liters per minute

And water quality testing reports

Previous inspection report

Every three years, it is recommended to perform additional tests on pH and total dissolved solids, as well as tests related to land uses that occur or are expected to occur within sight of the well. Additionally, if there are stains or sediments in the water, look for tests that will help determine the source of these symptoms. .

good performance

As the water well ages, The water pumping rate (commonly referred to as well productivity, flow or performance) tends to decrease, especially in wells that were not properly developed when first drilled. A decline or complete loss in water production from the well can sometimes occur even in wells. Relatively new due to low water levels from persistent drought or overpumping of the well that can remove water from water-bearing areas often Declines in well productivity over time can be related to changes in the water well itself including:

– Crusts of mineral deposits

– Biological contamination through the growth of microorganisms

– Physical obstruction of the “aquifer” (the saturated layer of sand, gravel, or rock through which water moves) by sediments

– Sand pumping

– Well screen or casing corrosion

– Pump damage

Rehabilitation of water wells

Measures taken to correct these problems are indicated as well as rehabilitation or restoration.

Successful well rehabilitation will increase water flow from the well.

The chances of successful rehabilitation depend on the cause(s) of poor performance and the degree to which the problem has progressed.

When you notice a loss of performance in your well, have a professional water well contractor inspect your well, preferably with a downhole camera.

To detect deterioration in well performance you must have a reference point.

This reference is often the original well construction and pump test data that is usually provided to you by the well driller in the well completion report

or well log when the well was installed.

However, even if you do not have this information,

Significant changes in your well are also a warning sign Major changes in any of the following well characteristics indicate that your well or pump needs attention:

In case of low pumping rate

Or low water levels

Low specific capacity

Increased sand or sediment content in the water (turbidity)

Reduced overall well depth

The two most common methods of water well rehabilitation are:

1- Chemicals to dissolve crusty materials from the well

2- Physically clean the well

Physical methods include the use of a brush attached to a drilling rig, high-pressure jetting, hydrofracturing and well flow.

All three of the latter techniques involve injecting water (and sometimes chemicals) into the well under extreme pressure.

Sometimes contractors use a combination of these methods depending on the reason(s) for the well’s decreased performance.

abaar Group cooperates
In identifying the depth of the presence of salty and sweet water
Identifying freshwater areas without drilling using a geophysical probe
Cooperation in choosing suitable land for agriculture
The company also conducts soil surveys using the latest soil surveying machines to determine the soil surveys and determine the foundation level.

To follow more, follow us on our page
Facebook: Abaar Group for Maintenance and rehabilitation and supply of submersible pumps and disinfection of wells