Library
Well rehabilitation is defined as restoring a well to its most efficient condition by various treatments or reconstruction methods (groundwater and wells). This continuing education unit discusses the causes of deteriorating well performance and methods, both traditional and more recently introduced methods.
ISWD (n.y): Well Rehabilitation. Lakeland, FL: International School of Well Drilling (ISWD) URL [Visita: 11.03.2019] PDF
The Code of Practice sets out nine principles that relate directly to the practicalities of borehole construction. They should be adhered to in order to provide cost-effective boreholes.
DANERT, K. ARMSTRONG, T. ADEKILE, D. DUFFAU, B. OUEDRAOGO, I. KWEI, C. (2010): Code of Practice for Cost Effective Boreholes. St. Gallen: Rural Water Supply Network (RWSN) URL [Visita: 11.03.2019] PDF
Many people living in coastal regions rely on shallow groundwater for their water supply. Seawater flooding after a severe storm or tsunami can damage wells and contaminate the groundwater. This technical note provides advice for rehabilitating wells in such circumstances.
VILHOLTH (2011): Cleaning Wells after Seawater Flooding. Technical Notes on WASH in Emergencies #15. Leicestershire: Water, Engineering and Development Centre (WEDC) URL [Visita: 11.03.2019] PDF
This study reviews the situation in the drilling sector in Tanzania, assesses options, and identifies support areas.
BAUMANN, E. BALL, P. BEYENE, A. (2005): Rationalization of Drilling Operations in Tanzania. Review of the Borehole Drilling Sector in Tanzania. St. Gallen: Rural Water Supply Network (RWSN) URL [Visita: 11.03.2019] PDF
This field note has been written for managers of water supply programmes and projects. It provides a step-by-step guide on the siting of drilled water wells. As a first step, the essential requirements for a simple groundwater model are set out, including some basic explanations to help the reader establish a sound understanding of hydrogeology.
CARTER, R. CHILTON, J. DANERT, K. OLSCHEWSKI, A. (2010): Siting of Drilled Water Wells. A Guide for Project Managers. St. Gallen: Rural Water Supply Network (RWSN) URL [Visita: 11.03.2019] PDF
The Minnesota Department of Health (MDH) is advising well owners that private water wells contaminated with floodwater can pose a health risk. This brochure proposes what measures should be taken to protect wells from flooding.
MDH (2011): Flood Precautions For Private Water Wells. St. Paul, MN: Minnesota Department of Health (MDH) URL [Visita: 11.03.2019] PDF
RWSN, with support of the Water and Sanitation Programme of the World Bank (WSP-AF) is supporting the formation of a Nigerian Drillers Association. This report provides an overview of the Nigerian drilling environment and sets out the first stage of the process of establishing the association.
ADEKILE, D. (2007): The Drilling Environment and Establishing a Drillers Association in Nigeria. Summary Report. St. Gallen: Rural Water Supply Network (RWSN) URL [Visita: 11.03.2019] PDF
Well disinfection is used to inactivate or control bacteria populations in a well and the distribution system. This brochure describes the simple chlorination method.
AAFC (n.y): Water Well Disinfection – Using the Simple Chlorination Method. Water Stewardship Information Series. Ottawa: Agriculture and Agri-Food Canada (AAFC). URL [Visita: 11.03.2019] PDF
Many people living in coastal regions rely on shallow groundwater for their water supply. Seawater flooding after a severe storm or tsunami can damage wells and contaminate the groundwater. This technical note provides advice for rehabilitating wells in such circumstances. It should be used in conjunction with Technical Note 1 which provides general information about rehabilitating wells after a disaster.
VILHOLTH, K. (2013): Cleaning Wells after Seawater Flooding. Technical Notes on WASH in Emergencies #15. Geneva: World Health Organization (WHO) URL [Visita: 11.03.2019] PDF
This fact sheet contains a step-by-step procedure for performing a simple disinfection of private wells and water (plumbing) systems using chlorine bleach (sodium hypochlorite).
MDH (2012): Well and Water System Disinfection for Private Wells. St. Paul, MN: Minnesota Department of Health (MDH) URL [Visita: 11.03.2019] PDF
This report provides a summary of the study on how to optimise the costs of boreholes construction in Zambia, Ghana and Burkina Faso.
DUFFAU, B. OUEDRAOGO, I. (2009): Burkina Faso: Summary of Findings of 2009 Study and Draft National Code of Conduct. Code of Practice for Cost-Effective Boreholes. St. Gallen: Rural Water Supply Network (RWSN) URL [Visita: 11.03.2019] PDF
This manual explains in practical terms the basic drilling techniques. It describes the use of fluid circulation in soft ground formations, and com- pressed air and hammers for hard rock. It discusses well design, types of pump and their installation, screen selection, and testing.
BALL, P. (2001): Drilled Wells. (= Series of Manuals on Drinking Water Supply , 6 ). St. Gallen: Swiss Centre for Development Cooperation in Technology and Management (SKAT) URL [Visita: 11.03.2019] PDF
Increasing access to groundwater is a high priority in Sub-Saharan Africa. One key to this is to reduce the costs of conventional drilling and borehole construction. This field note, describing a recent study in Ethiopia, sets out how this may be done.
CARTER, R. (2006): Ten-step Guide Towards Cost-effective Boreholes. Case Study of drilling costs in Ethiopia. St. Gallen: Rural Water Supply Network (RWSN) URL [Visita: 11.03.2019] PDF
This document provides a short summary of each of the hand drilling techniques being utilised today; a country-by-country overview of the extent of hand drilling taking place in select countries; an annotated list of organisations involved in promoting and supporting hand drilling and an extensive list of literature, from published articles to training materials and online videos.
DANERT, K. (2009): Hand Drilling Directory. St. Gallen: Rural Water Supply Network (RWSN) URL [Visita: 11.03.2019] PDFThe Rural Water Supply Network is a global knowledge network for rural water supply technologies and approaches. The website provides many excellent publications on various topics on rural development, particularly on hand drilled wells. This section presents an overview of the scale and type of hand drilling activity being undertaken in selected countries and the organisations involved.
The Web Map Application aims at visualising hydrogeological information collected within the WHYMAP project on a global scale. For more regional or country level interest, additional information on available hydrogeological maps is provided.