Borehole Drilling Process

Steps for the Borehole Drilling Process. You will notice while driving about all the posters plastered on walls and fences the suburbs over: “borehole drilling”. Those whose fences, walls and gates boast the poster are the only ones whose lawns are still green, whose cars are pristine, and whose water bills are still lean… All thanks to the borehole or well point!

Need for a borehole.

Now is the time that the need for a borehole is bigger than ever. Especially due to the water bills that just gets bigger and bigger while the informal settlements waste water as if there is no water shortage. They are the wasters because they get it for free.  It is a wise choice to get a borehole for the times to come. What if the rainfall is less than last year?

Alternative water sources.

With the dams drying up, the municipal water costs going up, and the people gets fed up with the bills. Now, it’s more important than ever to understand and consider alternative water sources. A borehole or well point is the option.

Want A Water Borehole.

You Want A Water Borehole; What is the next step? The options are clear. A borehole or a well point. The one is a lot cheaper than the other one. The only difference is that the well point needs a sandy area where the borehole can be drilled at any location.

What about the atmospheric generators?

That sounds like a very noble idea. The fact is that it is still a new invention and expensive. It is green but what is the amount of electricity it uses. To generate electricity is not a very green process. What is the amount of water it provides a day? Is it really worth looking into that option? I don’t think so.

Drilling a borehole.

The 5 steps in drilling a borehole?

The 5 steps in drilling a borehole Process.

Step one is to get the funds available at leased R 100.00 depends on how deep the water is in your area.

Step 2 – The Hydro-geologists site inspection.

First you needs to be determined where the water is, and how we’re going to get to it. That’s why we ask for hydro-geologists to make use that there is some water like a crack underground.

There is a variety of borehole drilling methods to assess the geophysical properties of the underlying area. These are the guys that help us ensure we’re not drilling into natural hazards or manmade infrastructure like pipelines, cables, phone lines, etc.

Step 3 – Drilling and Construction

Once the hydro-geologists provide us with the information that we need we can get our drilling equipment in place.

Once the borehole has been drilled the necessary unstable lengths of the borehole are steel cased in an effort to reinforce the borehole.

Step 4 – Determining the yield of the borehole.

In order to most accurately gauge the yield of amount of water that the borehole produces. This involves installing a test pump and pumping the borehole water for a fixed set of variables; a given time at a given rate and then assessing the test’s impact on the water level in the borehole. Maximum yield is achieved by increasing the abstraction rate, ensuring optimum drawdown of water in the borehole.

Step 5 – Pumping and piping of the borehole.

The kind of pumping system and piping installed in your borehole will largely depend on the intended use of the borehole water.

Cape Aquifer

All you need to know about Borehole and wellpoint water in the western Cape. This is not our view but a article of the negative views of some of the doom prophets.

View of borehole and well point water usage. 

Over the past few years there has been a shift in the mentality amount garden owners about tapping into groundwater for irrigation purposes. The initial attitude was one of complete abundance, almost as if the ground several metres below us is soaked in water.

Irrigating with borehole water and wellpoint water.

I call this the “sponge in a bathtub” mindset. The sponge floats with top just sticking out above the water line. Stick a straw into the sponge and you would be able to suck the water out of it.

In recent years this mindset has been shown to be fallacious as many wellpoint and borehole users have learned their lesson the costly way. Within months, for some, after sinking a bore hole their water supply has dried up. Drilling companies are no longer able to guarantee hitting water, nor are they able to guess how long the ground water will be available.]

Drilling the borehole deeper.

Some have stuck to the old unsustainable mentality and have decided to just drill deeper. Hoping to hit water again. The problem lies in the nature of gravity. Groundwater is always drawn deeper into the earth's crust. The more “straws” we stick into the sponge the faster the water level drops.

 

Now you may have heard the counter argument that rainwater replenishes groundwater supplies. This is only partially true. Cape Town has several underground aquifers, some shallow and some deep below the surface. "Statements of these so-called aquifers that is so big and that have this big amounts of water. Any person that makes a statement of anything underground is a liar. I will tell them in their face. They want to give the impression that the know but they don’t have an any knowledge at all. They must become politicians."

Cape Aquifer.

The shallow Cape Flats Aquifer can sometime be seen above ground, during times of high rainfall, and may lie as deep as 10 metres below ground at certain locations. This ground water source is replenished when it rains every year.

Table Mountain Group Aquifer.

Other ground water sources form part of the the Table Mountain Group Aquifer which lies much deeper. It is not uncommon for these borehole pumps to be sunk 80+ metres below. The problem with accessing this source of water lies in the extremely gradual recharge rate. This recharge rate is in terms of hundreds of years and not just one single year compared to the Cape Flats Aquifer. It is therefore not surprising that many shallower boreholes of 20 to 40 metres have dried up in recent years. Sucking water from this depth is unsustainable and costly.

Dry borehole.

I would not be surprised if you you know of a friend or neighbour who’s borehole has run dry in recent years. This is often the same story we hear from clients struck by the misfortune of their wellpoint or borehole drying up. For them we provide a sustainable solution to their water problem that still allows them to enjoy the bounty of their garden. It is true that we will not be able to supply thousands of litres of water to irrigate large water thirsty gardens daily but with our systems your garden is assured of water every day as long as you are still bathing, showering and doing laundry.

Cost of a borehole.

The cost of a borehole could be R50,000 + with the uncertainty of not knowing whether you will hit water or if it will dry up in the next year of two or you could spend between R8500.00 and R 12 000.00 on a greywater system and be guaranteed water everyday for many years to come.

Garden choice.

What choice will you be making this season as summer threatens the existence of your garden?