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A few buckets more — reducing sand-invasion and siltation in Angola
01.10.1998
In very soft (sandy) aquifer formations, drilled boreholes are often susceptible to fine media ingress. This can damage submersible pumps and block handpumps, leading to downtime, expensive rehabilitation procedures or, at worst, total abandoment. Mark Osola explains why a few buckets of washed river gravel can make all the difference.