In Lagos, a city of over 17 million people, water demands are mainly being met from tapping the groundwater that lies beneath the city. Boreholes provide water directly at people’s homes or business premises. Borehole construction is being paid for by householders and businesses themselves. Water vendors, selling water in jerry cans or trucks are also prolific. Given the limited reach of the piped infrastructure, much of the water vended is likely to also originate from below ground. In fact, exploitation of the large, relatively shallow aquifers that lie below Lagos is one of the main reasons that the city can continue to grow at all.
RWSN is currently hosting a 3 week discussion on ‘Cost Effective Boreholes’ as part of our Sustainable Groundwater Development Theme. Here are some highlights so far:
It is very interesting to read the inputs so far from Kenya, Zambia, Sudan, Nigeria, Ethiopia and Uganda.
From the discussions so far, it seems that the Kenya and Ethiopia have established regulatory frameworks for water well drilling (thanks Chrispine and Tesfaye). In the Kenyan case, government regulation, which is limited by capacity constraints is augmented by the monitoring of activities by the drillers association. It will be interesting to hear more on this from Chrispine and others in Kenya. In contrast Zambia (thanks Daniel) lacks any regulation with respect to groundwater resources. There is thus no registration of boreholes in the country whatsoever and even drilling records must not be collected. Although a water resources management act was passed in Zambia 2011 it still awaits launch and implementation. Perhaps there are also others with ideas for Zambia. In Sudan, we hear from Harm Bouta about a very fragmented drilling sector with no strict regulations in place, but that there are other initiatives taking place in Sudan from which we could learn more. Continue reading “Realities of water well drilling in Africa: e-discussion highlights so far”
About 1 billion people in rural areas rely on boreholes (mostly fitted with handpumps) for their water supply. Another 300 million in small towns and cities get their domestic water from boreholes.
What is a borehole?
Someone  once defined a tree as “a big plant with a stick up the middle”. Using this analogy, a borehole is “a long thin hole in the ground which produces water”. But of course just as trees are a bit more complicated than the definition would suggest, and just as trees come in all shapes and sizes, so too boreholes are more than ‘long thin holes …’. No two boreholes are quite the same.
If I wish to plant a tree and get fruit or timber from it sometime in the future, then I need to choose the right species, plant it in the right place, and nurture it until it becomes established. So too if I want to construct a borehole which will deliver clean water over both the short-term and the long-term, I need to choose its location with care, design it properly and ensure that it is drilled and finished straight and true.