- Rusty slime on pipes
- Cloudy, rusty or dirty water
- Iron build up on pumps
- Deposits of distinct white powder or limescale
- Reduced flow of water / borehole yield
- Clogging of perforated / slotted casing over time with sediment or mineral deposits
- Clogging of fissures, pore spaces and crack in the natural aquifer from sediment or mineral deposit
- In some boreholes or boreholes which may have been badly constructed the borehole may have collapsed
- The aim of any borehole rehabilitation project is to reclaim existing boreholes as opposed to simply abandoning them to drill a new one.
- This is often the most economic choice as there’s a cost involved of finding a new location, drilling and testing as borehole as the logistics of powering a pump and getting water to its required point of use.
- It’s worth remembering that a borehole was put in a particular spot for a good hydrogeological and pragmatic reason and in a lot of cases it makes much more sense to try rehabilitating a borehole than to drill a new one.
- Not only that, regular maintenance or remediation can improve the original yield and drawdown conditions as borehole as making the borehole more energy efficient especially with the additional introduction of modern technologies.
Borehole rehabilitation is typically done using either:
- Chemical techniques i.e. using various types of chemical to dissolve the encrusting materials so they can be removed from the borehole.
- Physical techniques such as high pressure jetting to displace anything clogging the borehole.
If borehole rehabilitation is a success you can save money, restore lost capacity, increase the life expectancy of the pump, improve overall water quality, and extend the life expectancy of the borehole.