Stronger together. Women Self Help Group Kee.
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Kenya: Sand dams provide drinking water and food safety

Kenya is considered a dream vacation destination in this country. But beaches and safari adventures for tourists are only one side of the East African country. Many Kenyans live in regions where livelihoods are anything but secure and climate change is leaving clear traces.
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Among the areas that have to deal with extreme weather conditions is Makueni District in Eastern Kenya Province. Here it is hot and dry most of the year. Only two short but heavy rainy seasons provide rainfall and thus irrigation for the fields. But within a few days, the water has seeped away and the rivers have dried up. The result: on the sandy soils, the farmers can draw only little yield from their fields. And they have to walk long distances to get their drinking water. There is no hope for improvement - on the contrary. Climate change is making the situation even worse, because the rainy seasons are getting shorter and shorter and the total amount of precipitation is falling. More and more often, farmers are therefore no longer even able to secure their own needs. Officially, the Makueni district is considered a food deficit region. Two thirds of the families live in poverty. Many of them are dependent on food distributions from international aid organizations.

Defying climate change

Our project aims to permanently improve the precarious living conditions of the small farming families living here. To achieve this, we are taking a whole package of measures with one major goal in mind: Enabling local people to respond constructively to climate change, to provide for themselves and to develop income opportunities. In technical jargon, this is called resilience. For this to succeed, the local people themselves play the decisive role in our project from the very beginning. This is because construction and support is only provided where the villagers have already taken the initiative and formed a self-help group. Your contact persons are our local partner organizations Africa Sand Dam Foundation (ASDF) and Laikipia Permaculture Trust (LPCT), who bundle the project measures and implement them together with the self-help groups.

Sand dams secure permanent water supply

The linchpin in each of our project villages is the construction of rock catchment basins or sand dams that permanently secure the water supply. The sand dams are built where no more water can be seen even a few days after the rainy season: in the dry riverbeds. The construction works on a simple principle: The dam holds back the sand and becomes a water reservoir. The people and their livestock benefit from this. At the same time, the groundwater storage layer stabilizes, allowing trees and shrubs to grow more vigorously and leading to better yields in the fields.

The construction work is carried out by the self-help groups in the communities involved. This is because our partner organizations work with the people and not for them. For this reason, the organizations do not distribute aid or cash, but bring expertise, training, logistical support, tools and some of the construction materials, such as cement and probation steel. Sand, gravel and rock, on the other hand, are contributed by the self-help groups. They spend months collecting and procuring the necessary quantities. Then construction begins under the guidance of experts from the partner organizations.  

First, the bedrock is exposed and a concrete wall is anchored. This wall is the actual dam and is designed in stages so that it can cope with floods of varying intensity while still allowing sufficient water to pass through for the communities downstream. Over the course of three rainy seasons, a shallow sand plain forms in front of the dams, upstream, which serves as a storage medium and prevents the water from evaporating as it would in an open reservoir. The sand also improves water quality by filtering the water.

Donate for this project

15 kilograms of drought-resistant plant seeds
year-round drinking water for a family at a sand dam
installation of a hand pump at a sand dam

Boosting positive effects even further through cooperation

The many years of experience of our local partner organization ASDF prove this: Where sand dams are built, there is sufficient water, people save time fetching water, new arable land is created, crops thrive better, new trees can be planted and: the microclimate improves. In our project, we specifically reinforce these positive effects by combining the know-how of two local partner organizations: ASDF contributes expertise in water supply and mobilization of self-help groups, and LPCT expertise in sustainable agriculture.

Even more water thanks to solar pumps

At individual sites with sand dams, solar pumps are also installed to pump water from the sand reservoir into a water system. This expansion happens in localities so far upstream that it is too far or arduous to walk to a hand pump. The Green Energy solution further rounds out the climate-adapted measures.

For all villages, water committees will be established and trained during the project to maintain and operate the new systems.

Plant trees, improve crops, ensure income

Through additional measures, tree nurseries are established and reforestation programs are implemented. These are important steps against increasing desertification in the region. Further improvements are being made in agriculture. During our project, smallholders learn how to build terraces in their fields and combat erosion. They receive drought-resistant seeds and training in sustainable farming methods and permaculture. In addition, they receive support in raising chickens and goats. Equipped in this way, the families can better provide for themselves and also develop new income opportunities.  

Previous projects have already made a big difference

arche noVa has been active in Kenya since 2012. Several self-help groups have already been supported. In addition to sand dams in individual project communities, rock catchment basins have been built to collect and store rainwater run-off from rock formations. Pipeline systems, water tanks and dispensing points were built.

Sites of operation also included schools, where we worked with ASDF to build rainwater storage tanks for water supply. Last but not least, hygiene education has played an important role in our country program from the very beginning. In 2020, these activities were further intensified in the course of Covid 19 prevention.

Last but not least, we take care of local climate protection on site by specifically promoting the use of energy-efficient stoves. To this end, volunteers are trained, who in turn conduct training sessions in the communities. They will explain how to build better stoves or seal existing ones. In this way, each individual family saves charcoal and firewood, and carbon dioxide emissions are reduced.

Project Overview


Securing drinking water supply and nutrition, as well as creation of income sources to fight the poverty

Target Group

4.160 persons in 10 villages

  • Construction of sand dams as well as solar pumps at existing sand dams
  • Establishment and training of water committees
  • Terrace construction on farms
  • Establishment of collective vegetable gardens as demonstration plots
  • Establishment of seed banks for crops
  • Distribution of drought-tolerant crop varieties (seeds) and tools
  • Reforestation and establishment of tree nurseries
  • Training on climate-adapted agriculture, agroforestry, marketing of products
  • Establishment of disaster preparedness structures
12/2020 – 12/2022
Co-operation partners
Africa Sand Dam Foundation (ASDF), Laikipia Permaculture Centre Trust (LPCT)
  • Aktion Deutschland Hilft
  • Federal Ministry for Economic Cooperation and Development
  • Donors