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Making boreholes work - rehabilitation strategies from Angola

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conference contribution
posted on 12.02.2018, 15:09 by Sam Godfrey, Peter Ball
In areas of the world where primary water supply is obtained from boreholes drilled in fine grained drift, there is potential for ‘sand’ or ‘media’ intrusion. This can result in clogging of borehole screens, damage to submersible pumps and blocked handpumps. Many boreholes encountering this problem of media intrusion are abandoned due to expensive rehabilitation procedures. This paper discusses field solutions adopted in Kuito, Angola where boreholes are highly susceptible to fine media ingress. Findings presented are based on the authors field experience between 1993 and 2002 whilst working for Oxfam GB in Angola. It outlines three remedial measures, namely, internal gravel packs, geotextile stockings and telescoped borehole design.

History

School

  • Architecture, Building and Civil Engineering

Research Unit

  • Water, Engineering and Development Centre (WEDC)

Published in

WEDC Conference

Citation

GODFREY, S. and BALL, P., 2003. Making boreholes work - rehabilitation strategies from Angola. IN: Harvey, P. (ed). Towards the millennium development goals - Actions for water and environmental sanitation: Proceedings of the 29th WEDC International Conference, Abuja, Nigeria, 22-26 September 2003, pp. 190-192.

Publisher

© WEDC, Loughborough University

Version

VoR (Version of Record)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Publication date

2003

Notes

This is a conference paper.

Other identifier

WEDC_ID:13053

Language

en

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