I have been informed countless times that borehole water is the safest water we could drink. I’ve always been curious as to how this is possible and why many scientists recommend that villages have a functional borehole or well. Obtaining water from underground involves drilling a hole into the ground to access underground water sources. This process is commonly used to extract groundwater for various purposes such as domestic use, agricultural irrigation, and industrial applications. This is mainly done while constructing a borehole or a well. So yes, your thought is correct, you can’t put a borehole or well just anywhere.
When we drink water from the underground water source, aid water has been filtered by the earth itself, leaving behind important nutrients and minerals. This is important because most of the water we receive from the municipal supply has been doctored with various chemicals that may be dangerous for our health.
HOW TO BUILD A BOREHOLE.
- The first step to accessing underground water is to select a suitable location for drilling the borehole. Geologists and hydrogeologists usually conduct surveys to identify areas with potential water sources underground. Various factors like water availability, depth, and quality are considered during site selection.
- Once the site is chosen, a drilling rig is brought to the location. The drilling process involves using rotary, percussion, or auger drilling methods to dig into the earth’s crust. The depth of the borehole depends on the geological characteristics of the area and the depth of the water table.
- Before putting the borehole into regular use, the water quality is tested to ensure it meets the necessary standards for its intended purpose. Testing may include checking for chemical contaminants, microbial contamination, and physical characteristics of the water.
- As the borehole is drilled, steel or PVC casing is inserted to prevent the borehole from collapsing and to maintain its integrity. After drilling is completed, the borehole undergoes a process called well development. This includes removing drill cuttings and fine particles to enhance the flow of water into the well.
- Once the borehole is drilled and developed, a pump is installed to extract water from the well. The type and size of the pump depend on the depth of the borehole, the amount of water required, and the intended use.
- After successful testing and approval of the water quality, the borehole can be used to extract water. The pump is activated, and the water is brought to the surface. It can then be distributed to the desired locations through pipes or other conveyance systems.
Even though groundwater, which is accessed through boreholes, is generally considered to be cleaner and less prone to contamination compared to surface water sources, it is not immune to pollution. Here are some common ways borehole water can become contaminated:
- Leakage from surface pollutants: If there are sources of pollution nearby, such as septic tanks, chemical storage facilities, or industrial sites, contaminants can seep into the ground and reach the groundwater, including the water in boreholes.
- Improper good construction: If the borehole is not correctly constructed or the casing is damaged, it can allow surface water to enter the well, carrying pollutants with it.
- Inadequate well maintenance: Neglected or poorly maintained boreholes may develop cracks, holes, or other structural issues that allow surface water to infiltrate and contaminate the groundwater.
- Agricultural practices: The excessive use of fertilizers, pesticides, and herbicides in agriculture can lead to the leaching of these chemicals into the groundwater, especially in areas with permeable soil.
- Waste disposal: Improper disposal of household waste, including chemicals, oils, and other hazardous substances, can lead to contamination of groundwater if these substances reach the water table.
- Leakage from underground storage tanks: Underground storage tanks, such as those used for storing gasoline or other chemicals, can corrode or develop leaks, allowing their contents to seep into the groundwater.
“Many drops make a bucket, many buckets make a pond, many ponds make a lake, and many lakes make an ocean.”
– Percy Ross