Friday, 26 January 2018 09:22

Borehole Yield Testing 101: How It Works

Would you like your borehole to continue providing water for a long time? Are you interested in a sustainable yield? Then a borehole yield test is mandatory.

A yield test consists of an evaluation to determine the balance between the highest volume of water which can be pumped from the borehole as well as the amount of water that flows back from nearby underground water sources.

After testing, we will present a certificate on which the date, level of the test pump installation, fixed water level, pumping rate and water colour is documented.

How do we test?

Test pumping involves pumping a borehole at a selected rate and logging the volume in the pumping well, in addition to your local observation wells at particular periods of time. Anytime these specifications are replaced in suitable flow equations; specific hydraulic variables can be determined. These guidelines, in addition to a qualitative review of discharge-drawdown elements, will be used for the analysis of a suggested yield of the boreholes and or aquifers.

It is normal to carry out a six-hour test which after a pump is installed with the potential of approximately 40-50% of water flow after the test. This 40-50% safety perimeter is enough in many instances, however, not always. We will discuss with the end user to identify what their requirements are and which type of test will be perfect their needs.

Boreholes that will be used every day and should be able to supply an efficient water supply every day, such as mass water supply for the public, commercial or irrigation, will require more advanced and lengthier water yield tests which can be more expensive. Despite this, the extra initial cost can save lots of money in the long run. Unless necessary, never pump the borehole at its full capacity.

How long does yield testing take?

During the step test, the pump rate is raised in steps at frequent periods. This particular test is especially beneficial to establish the effectiveness of the borehole, although not valuable in creating the long-term sustainable supply of a borehole.

In the Constant Rate Test (CTR), the well is pumped at a consistent discharge rate over the course of 8 - 48 hours. The release is kept steady throughout the test, and water levels are documented in the pumping boreholes together with monitoring boreholes. The time-drawdown information extracted from the CRT will then be examined. The analysis offers helpful feedback to judge the maintainable output of individual boreholes plus the perspective of aquifers.

Right after the CRT, once the pump is turned off, recovering water levels are calculated in the pumping borehole. This recovery test is incredibly valuable in researching the pumping result and possible dewatering of the aquifers which could result because of the confined scope of an aquifer. Additionally, the recovery test will reveal the volume to which the aquifer is in fact dewatered by determining the rest of the drawdown as soon as the borehole is ready to recover.

Water is a precious resource that should not be abused.

Published in Blog
Thursday, 25 January 2018 16:56

How To Select The Correct Borehole Pump

Once the borehole is drilled, it’s time to install the correct pump. It’s vital that you are aware that deciding on a pump is a critical step in getting the most benefit from your borehole. Why is it so important to choose the proper pump? Although the first expense of the pump is a major factor, the life span cost of owning the borehole also need to be considered.

Typical lifetime costs for a medium-sized industrial pump

Over and undersized pumps are extremely ineffective. They consume a lot of additional energy compared to the quantity of water provided. Additionally, pumps that are energy inefficient will likely have remarkably short periods in between breakdowns. So choosing the proper pump, even if it’s higher in price in the short-term, will be significantly advantageous over the lifespan of the installation.

With all the alternatives on the market, where does one start?

There are elements that you’ll need to take into account:

1. Never service your own borehole

There are elements that you’ll need to take into account:

  • Pump application - What do you intend to do with the water you generate from your borehole?
  • Garden irrigation - Using it for a sprinkler system or hosepipe.
  • Filling up a tank or reservoir
  • Domestic use
  • Farm applications like crop irrigation or water for animals
  • Mine dewatering

These varied applications will demand different pumps.

Pressure and Flow rate

No matter the application, it boils down to two principal components - the quantity of water to be moved, and the force that should be produced to get the water to where it is required

Pumping distance

The water will commence underground and finally be delivered to its endpoint through the pump. The longer the distance, the more powerful the pump will have to be.

Depth of the borehole

Moving water up vertically requires lots of energy, thus a deep borehole will need a much more potent pump than a shallow borehole.

Elevation

If there is a variation in height between the surface of the borehole and the water’s endpoint, then this also needs to be included in the pump selection process, since it will demand additional power from the pump.

Borehole recharge rate

Keep in mind the level of the water is an average measurement. The water level in a borehole will decrease as it is pumped from the borehole, and increase when it's recharged. The borehole’s recharge rate ought to be taken into consideration when choosing a pump, especially when the application includes dewatering.

Remember that pumps have restrictions to what they can do. If the array of duties is small, the selection gets far easier, but if there are several functions to cover, you may find yourself having to make some compromises. Let Eniviro Boreholes assist you with choosing the right.

Published in Blog

A home improvement project that has been growing in popularity over the last few years is drilling a borehole to have a water supply on your land.

Water is necessary for survival on earth, so we spend quite a bit of time and resources on trying to find it, extract it and conserve it.

If you are thinking about drilling a borehole on your property, check out the following advantages and disadvantages associated with it first:

Pros

1. Cost

When drilling a borehole, a pump and a filtering system are essential. This will demand an initial expenditure but you will eventually make a recover the funds and start saving money. You won't have to pay for monthly water charges from the municipality. Instead, you can use as much water as you desire free of cost.

2. Financial Benefits

Both residential and commercial water users may qualify for certain benefits when installing a borehole. Consult with your local municipality to find out if you are eligible for any tax breaks or government grants.

3. Taste

Groundwater consumers report that water from a borehole has a more pleasing taste in comparison to mains water. This may be due to the fact that groundwater is not chemically treated before it reaches your property and thus has a more pure, smoother taste.

4. Environment

The filtration system used for drilled boreholes creates much less pollution as opposed to industrial machines that filter water on a large scale. The filtering system of your borehole also reduces energy usage.

Cons

As beneficial as drilling a borehole there are some drawbacks.

1. No Chlorine

Despite the fact that insufficient treatment will give water a cleaner, softer taste, it may also leave space for harmful bacteria. Chlorine can help to cleanse the water and make sure nothing hazardous gets in. Without chlorine, your water could be susceptible to substantial levels of iron that may discolor your laundry, basins, bathtubs and showers. A strategy to deal with this is to install a treatment system, so your water gets treated before reaching you.

2. No Fluoride

Fluoride is essential for your oral health. Regrettably, not all boreholes will have adequate fluoride levels, but you can perform a water quality test to find out.

3. Electricity

Since your water pump is required to run off electric power, this may cause an issue any time there are power cuts. Should this happen, make sure to have some backup, like bottles of water stored away. Otherwise, once the electricity shuts off, the only water you'll have from your borehole is whatever is left in your tank.

If you are considering a borehole for your property, get in touch with Enviro Boreholes today.

Published in Blog
Thursday, 25 January 2018 15:47

Top 3 Benefits of Having a Borehole

Water Resources are the most vital element on the planet to have any form of existence, and it’s critical that we make sure to maintain this resource sensibly. Eight out of nine provinces in South Africa are currently declared disaster areas as a result of the drought. Furthermore, the price of water in South Africa continues to increase, mainly as a result of inflation and water shortages. The situation has further been depressed by the recently reduced rainfall in South Africa.

What exactly is a borehole?

A borehole is a long thin shaft which is drilled into the earth to seek out and extract groundwater. As reported by the Borehole Water Association of Southern Africa (BWA), it is best to speak to your local municipal offices to determine if you require authorization to drill a borehole in your neighbourhood. If approval is necessary and you have not requested it, the municipality may fine you heavily.

Benefits of a Borehole

You will have a self-sufficient water resource

Irrespective of whether you’re environmentally or economically inspired to live a self-sufficient and eco-friendly life, equipping your property with a borehole is a wise decision. Every person has an obligation to use natural resources sensibly, and once you make use of a well, that’s definitely what you’re doing. The water that boreholes generate is inactive underneath the surface, naturally increasing from precipitation as well as underground springs. Using this, in essence, means that you’re utilising an unused groundwater source. Also, it suggests that you have access to a dependable water supply that won’t be disrupted by troubles resulting from things out of your control like leakages or poor connections from ancient water pipe systems.

You can save money

You are making use of your private water resource simply by drilling a borehole, which will reduce a significant percentage of water related costs. Should you choose an advanced system with purification, it is possible to provide drinking water and terminate your dependence on a utility company and eliminate the costs altogether. By using the water out of your well, aside from the initial borehole drilling expenses, utilising it will set you back nothing more than a modest charge for the energy used to power your private borehole. As a result, should you routinely water your garden, wash your car or feed animals and livestock, then during the period of a year your savings may very well be significant.

Keep in mind, that in case you use the borehole water for human and perhaps animal ingestion that a water quality test is critical and needs to be completed every year.

You can even make money

A well-maintained borehole is a cost-effective, self-sufficient asset that can add value to your property. While initial fees of drilling and equipping may be great, you will discover long-term financial advantages to groundwater, especially the proven fact that borehole water costs less than municipal water. Enviroboreholes can help you find out if ground water might be employed to assist you in.

Published in Blog

Roelf Burger - Managing Director


Cell: 079 490 2314 | 072 792 8026
Email: info@enviroboreholes.co.za

Physical Address
Plot 11, Randfontein–South, Randfontein, Gauteng, 1759


Postal Address
P.O Box 2633, Kocksvlei, Randfontein, 1760

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