By Victor Dang Mvongo, MSc, a PhD student at the University of Dschang (Cameroon) and an independent consultant in WASH. He conducted the work featured in this blog at the Faculty of Agronomy and Agricultural Sciences.
Handpumps, the most common rural water supply equipment in sub-Saharan Africa, are a symbol of the sustainability issue facing rural water services. According to Macarthur (2015), handpumps are a lifesaver for 184 million people living in rural sub-Saharan Africa. Sub-Saharan African statistics on handpumps’ functionality indicate that 36% of them are broken, with country-level rates varying from 10% to 65% (RWSN 2009).
In Cameroon, little data are available on the functionality of the handpump. However, Deal and Furey (2019) estimate that 32% of handpumps are non-functional. Thus, for the impacted rural areas, this means that the anticipated returns on investment—better health, nutrition, and education—are jeopardized. In order to mobilize the necessary national and international efforts in the region, this study intends to give local information on the functionality of handpumps in the Mvila Division (Southern Region of Cameroon).
This blog is part of a four-part series covering the presentations given at the 11th Zambia Water Forum and Exhibition. The event, themed “Accelerating Water Security and Sanitation Investments in Zambia: Towards Agenda 2023 through the Zambia Water Investment Programme”, lasted three days.
Our blog series takes a focused look at the presentations and discussions that revolved around “Addressing Rapid Hand Pump Corrosion in Zambia – Stop the Rot!”, which was co-convened by UNICEF and WaterAid, together with Ask for Water GmbH and the RWSN, hosted by Skat Foundation.
Cover photo: Red, iron-rich water being pumped. Photo: WaterAid Uganda
Second session:
The role of galvanized pipes in the corrosion and failure of hand pumps
Empowered Communities Helping Others (ECHO) has been implementing a safe water project since 2020. This is a Water Sanitation and Hygiene (WASH) project, whose main intervention is borehole rehabilitation which is implemented in rural parts of Zambia’s Western and Central Provinces, in collaboration with the Local Authority. In practice, the need to rehabilitate a borehole arises when a functioning borehole presents usage problems such as non-production of water, worn out parts such as pipes, rods, handles, chains, cylinders, water chambers, pedestal, head assembly, bearings, etc.
Since 2020, ECHO has rehabilitated a total of about 850 boreholes in Central and Western Zambia, benefiting a total of about 255,000 people.
It was found that rehabilitating a borehole can be more economical than constructing a new one. It is simpler and faster and can be an appropriate solution in an emergency because it doesn’t require things like mobilizing a drilling rig. However, if the rehabilitated borehole is to be used for a long time, it is important to estimate its life expectancy.
The rehabilitation option chosen depends on the conditions of the existing borehole, the causes of the damage, the technical and logistic options, and the existing alternatives such as the construction of a new water point.
According to the severity of the borehole problems, the work requirements may vary from a simple repair at the surface to re-equipment.
For the project, all GI pipes are replaced with new PVC ones. This is done in order to prevent and reduce iron contamination (as a result of corrosion) which from the past four years we have observed is a contributing factor to borehole failure and abandonment
The main observed sources of iron are:
▪ From natural sources in the aquifer
▪ From pump components such as steel casings and galvanized pipes.
▪ In other instances, a combination of both has been observed to be possible. ▪ Within 3 to 6 months of installing hand pumps with galvanized material, pipes and rods have been found to be heavily corroded.
▪ When corrosion is the main source of iron, iron concentrations reduce drastically when water is pumped out and fresh recharge is allowed. If iron concentrations remain high throughout during continued pumping, the case has been that it is likely the iron is coming from the aquifer.
Experiences on hand pump corrosion
Hand pumps with GI pipes, sometimes only a year or two old have corroded, and people have returned to unprotected water sources. Water with pH below 6 has been observed to have corroded pipes. High iron concentrations in handpumps have been a usual occurrence this has been observed through regular water quality testing and evaluating the change in iron concentration over the period of our operations. Stainless steel pipes and rods had corrosion rates lower than galvanized iron (GI) pipes and rods.
Experiences on hand pump corrosion
The brown or reddish color is observed in the morning when the pumps had not been used during the night
However, groundwater has been observed to hold significant concentrations of iron but appears clear and colorless. When this water is pumped out after being exposed to the atmosphere, the color changes to red/brown.
Figure 3: Sampled on Friday 2nd June 2023 in Central Province.
General complaints recorded from communities:
Within weeks and months of installation, communities would begin to complain about water quality. These complaints range from metallic taste, odor, and the appearance of water. Also, the communities would report discoloration of water and cloths and highly turbid water.
All these result in people abandoning the water point and going back to unprotected alternative water sources.
Positive observations
The use of uPVC pipes and stainless-steel adapters has so far shown positive results in reducing iron contamination. After switching from galvanized pipes to UPVC, the communities have observed reduced to no brown or reddish color in the water. uPVC pipes last long, so you won’t have to worry about replacing them anytime soon. Since uPVC is non-porous, uPVC pipes help by preventing any contamination from occurring. uPVC is resistant to corrosion as it is not susceptible to chemical and electrochemical reactions, so there are better option in controlling iron contamination. The use of uPVC pipes and stainless-steel adapters has so far shown positive results in reducing iron contamination
Figure 4: Riser pipe removal and water quality testing for an installation that was less than six months old by ECHO.
What we are advocating for:
▪ Stakeholders should address the handpumps with corrosion problems as a priority in order to guarantee the water quality we supply to the people.
▪ Testing boreholes that present iron contamination to determine whether the source of iron is from the aquifer or from corrosion. This will provide the best options for the right material to equip the water point with
▪ Competent borehole drilling and rehabilitation supervision should be ensured so that all standards and specifications are adhered to.
▪ Regular water quality analysis is undertaken, and critical parameters are tested to address problems such as corrosion and other related problems that shorten the life span of a hand pump
You are invited to access the presentations HERE, along with the session’s concept and report. If you would like to dive deeper into the enriching exploration of water challenges and solutions through the Stop the Rot initiative, visit this page.
About the author:
Annie Kalusa – Kapambwe presenting at at ZAWAFE 2023
Annie Kalusa is an accomplished development practitioner and administrator. Currently working for a local Zambian NGO Empowered Communities Helping Others (ECHO) in Zambia, focusing on improving the wellbeing of Vulnerable Rural Communities. Her areas of focus are climate resilient Water Sanitation and Hygiene (WASH). She is currently developing her thesis on Rural Agriculture Practices and Mechanisms for Water Resource Management.
This blog is part of a four-part blog series highlighting the presentations delivered during the 11th Zambia Water Forum and Exhibition. The event, themed “Accelerating Water Security and Sanitation Investments in Zambia: Towards Agenda 2023 through the Zambia Water Investment Programme”, lasted three days.
Our blog series takes a focused look at the presentations and discussions that revolved around “Addressing Rapid Hand Pump Corrosion in Zambia – Stop the Rot!”, which was co-convened by UNICEF and WaterAid, together with Ask for Water GmbH and the RWSN, hosted by Skat Foundation.
Third session:
The journey towards reducing the effects of rapid corrosion in Kalumbila District.
Kalumbila District is a district in the North-Western Province of Zambia. It has two major mines namely Lumwana and Kalumbila Mines.
With a population of over 170,000, the district has about 300 water points (boreholes and protected wells equipped with handpumps).
Rapid handpump corrosion has been a problem since the district was created in 2015. One of the interventions that the district has undertaken has been iron removal filters (to remove iron from pumped water), although these have not been sustainable.
Figure 1: Location of Kalimbula District
In every program of drilling of boreholes about 40% of boreholes were abandoned within one year after handover due to rapid corrosion.
We started looking for a solution to this problem. We found that iron filters were used but were not sustainable.
Figure 2: Handpump evaluation
One of the interventions that the district has undertaken has been iron removal filters (to remove iron from pumped water), although these have not been sustainable. In Kalumbila District it was found, that in every borehole programme, about 40% of the handpumps installed were abandoned due to high iron content, with some boreholes being abandoned as early as three months after construction and commissioning.
Projects
In 2017 UNICEF supported Kalumbila district in the drilling of 23 boreholes and rehabilitation of 15 water points.
In 2018 JICA also supported Kalumbila district with rehabilitation of 77 water points using uPVC pipes with stainless steel adapters. It is from these projects that we learnt a lot of important lessons and made recommendations to the D-WASHE committee. No water point was abandoned after one year of handover Kalumbila district decided to suspend the use of galvanised iron (GI) pipes and recommended the use of stainless steel and uPVC pipes for Indian Mark II and Afridev hand pumps.
Lessons learnt
It is from these two projects that we learnt a lot of lessons, and we told ourselves never to keep quiet. From these two projects, we observed that no water point was abandoned after one year of handover. We saw a solution – why continue to use GI pipes when there was a solution. So we made recommendations to the D-WASHE committee. After this, Kalumbila district decided to suspend the use of galvanised iron (GI) pipes and recommended the use of stainless steel and uPVC pipes for India Mark II and Afridev hand pumps. We have discovered that handpumps with stainless steel riser pipes do not require frequent repair and maintenance whereas sometimes the GI pipes would require replacement every six months. For the past four years, those handpumps remain working.
Our challenges include a lack of funding for the rehabilitation of boreholes affected by rapid corrosion. Further, some stakeholders have not supported the districts fully.
Recommendations
Stakeholders at the national level take an interest in order to address this issue of rapid corrosion.
The use of materials that are environmentally friendly without change of properties when they come into contact with aggressive water (i.e. materials such as stainless steel and uPVC).
There is capacity building of all Area Pump Menders (APMs) in Afridev hand pumps.
All hand pumps that have galvanised iron (GI) riser pipes are to be rehabilitated.
You are invited to access the presentations HERE, along with the session’s concept and report. If you would like to dive deeper into the enriching exploration of water challenges and solutions through the Stop the Rot initiative, visit this page.
About the author:
Daniel Shimanzapresenting at ZAWAFE 2023
Daniel Shimanza is a Zambian Citizen who has worked in the water sector for more than 6 years. He worked on many water supply projects in Kalumbila district, Zambia in collaboration with GRZ, NGOs such as UNICEF, and World Vision. He has a passion for the improvement of access to clean water supply for people living in rural areas. He’s championing a campaign to reduce the effects of rapid corrosion in Kalumbila district by using alternative materials such as stainless steel pipes, PVC pipes, Iron Filters, and more. He holds a Diploma in Water Engineering from NRDC and currently pursuing a Bachelor of Civil Engineering from the Copperbelt University.
This blog is part of a four-part series covering the presentations given at the 11th Zambia Water Forum and Exhibition. The event, themed “Accelerating Water Security and Sanitation Investments in Zambia: Towards Agenda 2023 through the Zambia Water Investment Programme”, lasted three days.
Our blog series takes a focused look at the presentations and discussions that revolved around “Addressing Rapid Hand Pump Corrosion in Zambia – Stop the Rot!”, which was co-convened by UNICEF and WaterAid, together with Ask for Water GmbH and the RWSN, hosted by Skat Foundation.
2023 is racing by all too quickly! But as we enter the second half of the year, let’s look at how rural water professionals are using our the network:
membership of our RWSN LinkedIn group is going wild: 16,795 people! This is up from 12,748 in January (by comparison it took the group 8 years, from 2012 to 2020, to get to over 5,000 members)
Although our Twitter following grew from 4,174 to 4,455 so far this year, engagement is down. Is Twitter dead? For serious exchange, perhaps yes.
Nearly 10,000 documents were downloaded from the RWSN online library so far this year, and here is the current top ten:
Well, we try and curate a variety of resources that we think are likely to the most useful for rural water operators, regulators, researchers and policy-makers, but it is clear that from our online library of more than a 1,000 reports, books and presentations, what you want from us is practical guidance.
It’s interesting that some the resources above are more than a decade old, but that shows that good advice is timeless. We don’t just hold work from RWSN, but from wherever we can find it, but it is notable that the work of RWSN legends Peter Morgan, Kerstin Danert, Dotun Adekile, Richard Carter, Sally Sutton, John Butterworth, Moustaphe Diene, and Jon Naugle are so prominent in what users download. And thank you to all our authors, reviewers, presenters and members who generate and share such valuable content.
This year we are preparing our RWSN strategy to 2030, the end of the SDGs. So, what practical guidelines or standards are missing from your work that we could work with partners to create?
If you measure something, how do you know that someone else would get the same result? This is a fundamental question in many fields including medicine and psychology, but it is rarely considered in rural water supply.
Photo: A handpump mechanic performs preventive maintenance in Uganda (Photo: Daniel W. Smith)
If you measure something, how do you know that someone else would get the same result? This is a fundamental question in many fields including medicine and psychology, but it is rarely considered in rural water supply.
This problem became painfully apparent during a recent study of professionalizing handpump maintenance in Uganda conducted by the Program for Water, Health, and Development at the Stanford Woods Institute for the Environment and International Lifeline Fund. Our data collection team had a seemingly straightforward instruction: Count a handpump as functional if it provides water. But different data collectors interpreted the instruction differently. Some would count a handpump as functional even if it took a long time to get a little water. Others counted handpumps in a similar condition as nonfunctional. We needed a clearer, more reliable procedure to ensure that handpump functionality measured by different people would be comparable.
I am sorry to inform you of the passing of Dr. Otto Langenegger, who peacefully left us on 19 February, 2023 surrounded by his family, aged 84.
Dr Langenegger was the pioneer of rapid handpump corrosion. His seminal publications in 1989 and 1994 set the foundation for all that followed in trying to understand and address this phenomenon.
In his eulogy, he was poignantly referred to as a “nomad around water”. He grew up, in humble surroundings, close to Lake Constance in eastern Switzerland, the youngest of six siblings.
His thirst for discovering and learning could not be quenched by his apprenticeship as a radio technician in Winterthur. He was a through-and-through scientist and researcher, moving between subjects throughout his life, and building on the learning from one area as he branched into another. Together with his wife Dorothea, he moved to work in Canada for several years, from where he was able to, amongst other experiences, be part of an expedition to the Arctic, an exposure that he relished for the rest of his life.
Dr. Langenegger and his wife, with their two sons Urs and Thomas, moved back to Switzerland, and he completed his first PhD at the University of Bern in 1973. But he was soon on the move again, this time to Ethiopia, where he worked as a Hydrogeologist with the Christoffel Mission. He was fascinated by the people and culture, and was saddened to have to leave in 1976 due to the difficult political situation at the time.
Dr. Langenegger was not long back in Switzerland, before heading off to Africa in 1981, initially to Ghana, where he worked for the World Bank on the pioneering water well drilling and handpump installation project of its time in West Africa. This position, and the subsequent assignment based out of Abidjan, took him to Burkina Faso, Cote d’Ivoire, Ghana, Mali and Niger.
As a keen observer and compassionate man, Dr Langenegger was both intrigued and appalled by the ‘red water’ problem, coupled with corroding and failing handpumps that he observed in many parts of West Africa during his field work. And so, he set out to understand the causes. Initially using his own allowances to test water quality, he diligently researched this issue. One of his colleagues from the time told me that he stayed in the cheaper hotel in Kumasi – saving money for testing, and filling the bathtub with his tests. He also had his wife, Dorothea, cook plantain with different concentrations of iron-rich water from the rapidly corroding handpumps to see what happened to them. They changed colour.
Anyone working on handpump corrosion is familiar with Otto Langenegger’s seminal publications (1989 and 1994), which have provided the foundation for all that has followed on this topic. His second PhD was in fact on Handpump Corrosion.
After returning to Switzerland in 1989, Dr. Langenegger set up his private consultancy practice, working out of his home in Gais, Appenzell. Overlooked by snow-capped Alpstein mountains, his interest in water found an outlet in learning about the blue coloured snow, high on the slopes. And so once again, this through-and-through researcher set about observing, measuring and interpreting. I would say that Dr. Langenegger’s, keen interest and thirst for knowledge in relation to water was insatiable.
It was 2019 that Dr. Langenegger, who would soon to be known to me by the informal address simply as Otto, contacted me. He had found my own report on Rapid handpump corrosion in Burkina Faso and beyond and wanted to know more. Otto was both disgusted that the corrosion problem had not been fully addressed (after more than 30 years), but was also pleased that it was at least being looked at again. Unbeknown to me previously, he lived just a few stops along the train line from St. Gallen where I am based!
Otto had been out of touch with the water supply world in Africa for a long time, but had, now and then, searched for what may have followed on from his work on handpump corrosion. And so he was aware of the presentation entitled ‘New signs of an old Problem’ at the WaTer Conference in Oklahoma in 2015 by Vincent Casey, Lawrence Brown and Jake Carpenter.
Over the last two and a half years that Otto and I were able to share, he followed all of the ongoing efforts and work to address rapid handpump corrosion – the issue which he has pioneered in the 1980s. He was delighted to be able to talk about the subject, and, researcher that he was, always asked such pertinent questions and put forward ideas.
Throughout his long illness, and even as he grew weak towards the end of his magnificent life, he always wanted to hear the latest news. His delight to hear that the corroding handpumps in Ghana had been replaced in the 1990s is something that will always remain with me. “It was not all for nothing” he remarked, fist in the air, referring to his efforts over 30 years ago.
Dr. Otto Langenegger will be much missed. May he Rest in Peace.
He leaves behind a large family:
Urs and Marika Langenegger-Bohse with their children Tabea, Dominik and Eliane.
Thomas and Anita Langenegger Vogel, with their children Samuel, Jonas, Elias, Rahel and Salome.
In 1983, I moved to live and work in Ghana – some 40 years ago now. Back then, I was the regional supervisor on the 3000 Well Maintenance Unit in Southern and Central Ghana which was funded by the German Development Service under the Rural Water Supply programme. The project was a pioneer of its time, and included drilling boreholes alongside the installation and testing of handpumps in six of Ghana’s regions, as well as the Nanumba district, Northern Region.
We initially installed India Mark II and Moyno pumps, before dropping the Moyno due to technical problems. However, we soon realised that the India Mark II pumps faced corrosion issues. Investigation and testing (as documented by Langennegger, 1989 and Langenegger, 1994) found that the Galvanised Iron components (rods and riser pipes), when installed in water with low pH, had a propensity to rapidly corrode – leading to discolouration of the water and affecting taste, but also causing the pumps to fail prematurely as the rods broke and riser pipes developed cracks and holes and even fell into the borehole. The envisaged idea of maintenance by communities, with assistance from mechanics who could reach villages by motorcycle, was simply not feasible with such installations. Another significant issue related to corrosion of hand pump parts was the water contamination and bad taste of the water. As a result, the water coloured the food and therefore caused the population to stop using the borehole water and forced them to go back to unsafe water sources
We, therefore, had to seek alternatives. This involved field testing and collaborating with the Materials Testing Institute of the University of Darmstadt.
We looked into replacing the galvanised iron components with stainless steel. To ensure the pipes were light, we considered using 3 – 3.5 mm thick pipes, and used a threading that at the time was used in the drilling industry , known as the “rope thread”. Although Atlas Copco had patented this threading type at the time, it was later manufactured in India after the Atlas Copco design period (patent) ended.
Figure 1: Rope thread (Claus Riexinger)
The pump rods presented some challenges as well, since the AISI Stainless Steel grade 316 that we were using was subject to breakage, including the threaded parts. In collaboration with our partners at the University of Darmstadt, we were able to find ways to make this grade of stainless steel more elastic by adding 2-3 % Molybdenum. Other issues with the rods related to the use of rolled thread, which we learned was more durable than cut thread. Incorporating these materials and techniques, we were able to reduce the rod diameter from 12 mm down to 10.8mm, resulting in lighter rods which did not corrode. The only drawback was that the threads could not be cut in the field, but this was not such an issue, as there was no need to cut them when they were installed, or upon maintenance.
Figure 2: Pump installation (Claus Riexinger)
After switching to stainless steel riser pipes, we encountered another issue: -galvanic corrosion between the pipe and the water tank. This type of corrosion occurs when two dissimilar materials come into contact in solution. It was yet another challenge! Fortunately, we were able to solve this problem by replacing the existing flange with a new one made of stainless steel with an insulating gasket, into which the riser pipe could be screwed and prevent any further galvanic corrosion.
Figure 3: Ghana Modified India Mark II Handpump – water tank, spout and flange
After conducting extensive testing and collaborating with the University of Darmstadt over a period of around 4 years, we managed to solve the problem of rapid corrosion of handpumps in Ghana. The improved pump design came to be known as the Ghana Modified India Mark II, and was officially adopted by the Government of Ghana in the 1990s. Its specifications can be downloaded here.
Designing and publishing the specifications for a new pump is one thing, but the other is ensuring that these are adhered to. A series of meetings with government, donors, and NGOs working in the water sector in the 1990s, led to the agreement to no longer use Galvanised Iron. All stakeholders were on board with the change.
Of particular importance was the tremendous support and buy-in of the major donor at the time – KfW (Germany). They agreed to pay for the increased costs of the Ghana Modified Pump on new installations, which at the time was about three times more expensive than the version using Galvanised Iron. KfW also supported the rehabilitation and replacement of the pumps that had previously been installed using Galvanised Iron. As a result, we were able to remove and replace the corroded installations systematically, rather than addressing the issue in a piecemeal manner.
It is estimated that over 4,500 Ghana Modified India Mark II handpumps had been installed in Ghana by the time I left the 3000 Well Maintenance Unit in 1992. Anecdotally, I would say that 90% were working, and of the 10% out of use, they were down for maintenance/repair.
KfW took this design to Cameroon, while Danida took it to Burkina Faso and Zambia. I am not fully aware of what happened next, but I do know that ensuring the quality of stainless steel was a problem in Burkina Faso.
I am very pleased to see that Ghana Modified India Mark II handpumps are now available through the Rural Water Supply Network (RWSN), and hope that these can be of use to other countries that are struggling to overcome the rapid handpump corrosion problem.
Figure 4: Example factory inspection Modified India MKII (Claus Riexinger)
However, I have a work of caution too. Although specifications, standards, and clear procurement documents are essential, they are rendered meaningless in the absence of inspection. During my time with the 3000 Well Maintenance Unit and later as an independent consultant, I traveled to India and other places for pre-shipment inspections. I also oversaw the rejection of consignments from India and Europe due to poor quality or manufacturing mistakes. And so, I urge all of you involved in handpump procurement and installation to make sure that you ensure the quality, especially through inspection and material testing.
About the author: Claus Riexinger is a rural WASH expert and freelance consultant with over forty years of experience in development cooperation with Government organisations, private companies, and development agencies mainly in Botswana, Lesotho, Malawi, Germany, India, Tanzania, and Ghana.
Professional Drilling Management & Groundwater Resources Management
Thanks to funding from the Federal Institute for Geosciences and Natural Resources (BGR) in Germany, 2022 saw Ask for Water GmbH, together with the Africa Groundwater Network, Cap-Net UNDP and several other partners (see below) develop and run two online courses on groundwater. The courses strengthened the capacity of staff of governments, NGOs, the private sector and academia in African member states and beyond.
The courses, hosted by Cap-Net UNDP, and offered free of charge to participants, were entitled Groundwater Resources Management and Professional Drilling Management. Each course was specifically developed for professionals working on these issues, or responsible for decision making.
Face to face training course on drilling supervision in Sierra Leone (Source: Kerstin Danert)
Professional Drilling Management Course
Drilled water wells are vital to achieving universal clean drinking water, providing safe, affordable, reliable and available water sources. To ensure that the water wells or boreholes are built to last, they must be drilled, developed and completed in a professional manner. Key elements of a professional drilling sector are robust procurement, contract management, siting, borehole design, construction, and supervision. Furthermore, the management of the groundwater resources must also be considered and support provided to long-term maintenance if services are to last. Unfortunately, in many countries it is difficult to develop skills in these areas due to a lack of training and mentoring opportunities.
The 2022 online course on Professional Drilling Management provided participants with a comprehensive overview of the different aspects of drilling management, specifically (i) groundwater data and siting; (ii) procurement and contract management (including costing and pricing; (iii) borehole drilling and supervision and (iv) legal and institutional frameworks. In the last of five modules, participants were encouraged to reflect upon and share actions that they as individuals and as organisations could take to raise drilling professionalism in the context in which they work. From the 781 people who applied for the course, 314 were selected, of which 209 were active participants. A total of 162, equivalent to 78% of the active participants passed the course.
You can access the 2022 course report, manual and key training materials here.
If you would like to learn about what alumni of previous online courses on Professional Drilling Management have done with their knowledge, check out the short film below or the short report of their testimonials.
Groundwater Resources Management Course
An estimated 50% of the global and 75% of the African population rely on groundwater for their drinking water supplies. Groundwater supports social and economic development and will become increasingly important in the face of climate change, as groundwater resources are often less affected than surface water by climate change impacts. If groundwater is to provide reliable, safe and sustainable water supplies now and for future generations, the resource must be well-managed. This requires consideration of the entire system of policies & laws, strategies & guidance, monitoring & management as well as investments & projects. Good groundwater management needs sound capacities in water authorities. But at same time, as many elements of groundwater management fall in other sectors, a general understanding of groundwater management principles in sectors like agriculture and urban planning is key for its successful implementation.
The 2022 online course on groundwater resources management provides participants with a comprehensive overview of the multiple factors that impact upon groundwater. It was a self-paced course and was hosted on the virtual campus of Cap Net/UNDP.
The course comprised 5 modules; each with a short introduction, goal, learning objectives and orientation video, as well as mandatory videos and reading materials:
Module 1: Characterization of Aquifer Systems from a Management Perspective
Module 2: Groundwater monitoring and data/information management & communication
Module 3: Groundwater quality and source water protection
Module 4: Groundwater regulation, licensing, allocation and institutions for aquifer management
Module 5: Transboundary aquifers in Africa: Approaches and mechanisms
You can access the 2022 course report, manual and key training materials here.
Artesian well near Lake Chad, Chad (Source: Moustapha Diene
What next?
The Rural Water Supply Network (RWSN), Ask for Water GmbH, the Africa Groundwater Network (AGW-Net), Cap-Net UNDP and partners would like to offer these courses on an annual basis. We are currently looking for sponsors/funders to make this possible. In case you are interested, please contact us via info@rural-water-supply.net.
This year we are celebrating 30 years since the Rural Water Supply Network was formally founded. From very technical beginnings as a group of (mostly male) experts – the Handpump Technology Network- we have evolved to be a diverse and vibrant network of over 13,000 people and 100 organisations working on a wide range of topics. Along the way, we have earned a reputation for impartiality, and become a global convener in the rural water sector.
RWSN would not be what it is today without the contributions and tireless efforts of many our members, organisations and people. As part of RWSN’s 30th anniversary celebration, we are running a blog series on rwsn.blog, inviting our friends and experts in the sector to share their thoughts and experiences in the rural water sector.
This is a guest blog by RWSN Member Jaime Aguirre, based in Bilbao, Spain.
EMAS is the Spanish acronym for “Escuela móvil del agua y saneamiento” meaning Mobile School of Water and Sanitation; the acronym was coined in the 1980´s in Bolivia by Wolfgang Buchner, supported by a group of volunteers.
The main mission of EMAS is to teach families how to obtain clean water by themselves. “Hand-on learning” is the most optimal way to learn these techniques.
The EMAS WaSH scheme include various Do-It-Yourself technologies like the EMAS manual pump, manual well drilling up to 90 metres, water storage tanks, and VIP toilets among others. All technologies have been in constant development since the 1990’s. They have been implemented in more than 25 countries, mostly in Latin America and Africa. The RWSN library hosts documentation and assessments of the use of EMAS technologies in Uganda, Sierra Leone, Panama and Bolivia amongst others.
The goal of EMAS technologies is to provide access to clean water and sanitation through training of local technicians and beneficiaries. These trainings are compact courses where over several weeks all techniques are demonstrated and practiced. In a long term, all facilities can be maintained by the user due to the technology’s simplicity. The result:
Improved access to clean drinking water for the world’s rural populations combined with simple sanitary facilities, thus preventing the spread of infectious diseases and reducing mortality rates.
Increased quality of life, e.g. by eliminating laborious water-hauling, thus saving women and children time and enabling small farming operations.
The trained well builders are self-sufficient and independent, and can, if necessary, receive repeated advising and training.
Sustainability: The wells and water facilities are very affordable. Experience has shown that the owners maintain the facilities quite well, which results in long service lives. Any repairs that may be needed are usually easy to complete.
All materials needed for these repairs can be obtained locally.
The materials and methods are environmentally responsible and most of the steps are performed manually.
The withdrawal of moderate amounts of water and its disciplined use have no negative impact on the environment or groundwater levels.
Improved opportunities for people to stay in their home regions permanently.
The EMAS hand pump is the key component of the EMAS-technologies because it is capable of pumping water vertically up to 50 m. While other hand pumps have higher resistance to intensive or even inappropriate use (many times when the pump is being used by a whole community), the EMAS pump is designed mainly for household use. EMAS pumps have a long service life since any repairs that may be needed are usually easy to complete by the user.
Video-instructions can be viewed on a YouTube channel which counts about 15.000 followers with some videos having over 700.000 views.
Sometimes adaptions of the technologies have to be made or are even necessary in some countries due to material availability.
As of now, approximately 70.000 EMAS wells have been drilled worldwide. The majority have been financed by the families or beneficiaries. Since the 1980’s, worldwide more than 100 trained technicians have created a micro enterprise offering WASH services to their community. EMAS technologies have been implemented in over 25 countries through cooperations with various local and international organizations (e.g. PAHO (Pan American Health Organization) ). As a result of the cooperation with Welthungerhilfe more than 3.000 EMAS wells have been drilled in Sierra Leone.
EMAS aims to partner with organizations which include WASH in their programmes and also wish to implement the mentioned technologies trough training projects in WASH. Projects should include follow-up and support to trained WASH technicians to help them in becoming SMEs. Many cases show that workers of SMEs create their own company and serve other regions which have high demand for WASH services.
An EMAS learning page will be launched shortly in order to share all experiences in various countries and also facilitate all available material. This webpage will also target users with technical skills who wish to learn more about the technologies.
Drilling a well in Sierra Leona WASH Center
Amadou, EMAS technician from Senegal going with his drilling equipment to make a new well
Training of EMAS pump making at Sierra Leone
Drilling training at Mali
EMAS systems including rainharvesting, underground tank, bomba manual, toilet, shower and sink
About the Author: Jaime Aguirre is originally a mechanical engineer who acted many years as design engineer in the wind energy sector. After some disappointing experiences with the implementation of high-tech WaSH technologies he joined in 2014 voluntarily an EMAS training in Bolivia. Since then, he has permanently been engaged in providing training together with German based NGO EMAS-International e.V. In 2015 he initiated the Spanish NGO TADEH in Bilbao, Spain which provides training in EMAS Self Supply technologies worldwide.
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