Innovation Lab For Small Scale Irrigation

Innovation Lab For Small Scale Irrigation

water resources

Solar irrigation in Mali: Potential to increase food security amid climate vulnerability

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Actions are needed urgently in Mali – the country is on the front-line of climate change, and expected to experience worsened food insecurity and even food shortages. The people of Mali rely heavily on rainfed agriculture, exposing them to pervasive climate-related shocks. Irrigated agriculture is one high potential pathway to increase resilience and improve food security.

With the growing urgency to expand irrigation expansion for smallholders in the region, suitability mapping can help to target the right people, in the right places and with the right technologies. ILSSI supported research to identify areas in Mali where there is a high potential for scaling solar water pumps for developing irrigation: Suitability for farmer-led solar irrigation development in Mali.

Results from the mapping show the total area suitable for solar-based irrigation varies between 0.69 and 4.44 million hectares (Mha), representing 11% and up to 69% of Mali’s agricultural lands. Groundwater up to depths of 7 m can be found near the river network in south-western Mali and the central Niger Delta making Kayes, Mopti and Koulikoro are the most suitable regions.

The mapping utilizes data including: solar irradiation, groundwater levels, aquifer productivity, groundwater storage, proximity to rivers, proximity to small dams, crop, and land suitability, and travel time to markets. Areas that are unsuitable for agricultural production, such as natural parks, forests, permanent meadows and pastures, are excluded. Suitability was assessed for five different available water sources, considering two different types of pumps.

Suitable areas could be expanded through investments in infrastructure to increase access to markets for produce. This mapping considered existing infrastructure, such as road networks and markets, so expanding that infrastructure could create greater potential in more areas.

More information, including the maps, is available in a Technical Brief. This research was carried out by the International Water Management Institute under the Water, Land, and Ecosystems Research Program. Additional funding was provided by the Deutsche Gesellschaft für Internationale Zusammenarbeit (GIZ).

ILSSI presents on research in Ghana

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“If you don’t work in the irrigated vegetable garden, you will sell the food crops you harvested during the rainy season – and you will be in hunger.” This is according to a farmer in Mongnoori, northern Ghana, shared during a seminar convened by ILSSI with the International Water Management Institute (IWMI) and International Food Policy Research Institute (IFPRI). Public, private and development sector participants discussed future research for small scale, farmer-led irrigation, as well the potential to empower women. ILSSI director Dr. Lefore presented on new research areas, and IFPRI’s Elizabeth Bryan shared research results from a multi-project effort on small scale irrigation and women’s empowerment in Ghana. Check out the presentations to learn more about past and new research.

Water-smart investment benefits ripple beyond food security

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By Meredith Giordano on April 23, 2016

Nearly four years ago, researchers documented for the first time how farmer-led irrigation in sub-Saharan Africa and South Asia is transforming food security at an astonishing scale. They also showed that smallholder water management innovations hold potential to boost crop yields and household revenue by tens of billions of US dollars.

Since then, however, new research for development has revealed how small-scale irrigation may have benefits that reach far beyond food security alone.

Four ways to invest in smallholder irrigation

The research was initially carried out by the CGIAR Research Program on Water, Land and Ecosystems (WLE) and its partners under the AgWater Solutions project. At its conclusion, the project recommended four key areas that investments should focus on in order to unlock the potential of small-scale irrigation:

  1. increasing access to water resources, including sustainable groundwater, small reservoirs and rainwater harvesting;
  2. catalyzing smallholder value chains, removing information and marketing constraints;
  3. creating policy synergies, such as aligned energy policies; and
  4. taking a watershed perspective to reduce adverse environmental impacts.

Learn more: Water for wealth and food security: Supporting farmer-driven investments in agricultural water management.  

Building on this work, WLE and USAID have supported research and development of business models that can operationalize these recommendations, while also exploring new solutions and creating a better understanding of potential additional impacts and benefits from investments in smallholder irrigation.

New technologies produce new opportunities and remove constraints

One new opportunity is solar pumps, which has only recently become a financially viable option for smallholder farmers. Solar power irrigation has taken off in India and is starting to take hold in sub-Saharan Africa, where solar powered pumps can serve as a more versatile, green alternative to motor pumps. The Africa Rising project, in collaboration with the International Water Management Institute (IWMI), has begun demonstrating solar powered pumps in two regions of Ethiopia.

Another new technology is wetting front detectors – essentially a device that makes it easy for farmers to see when the soil has been sufficiently watered. WLE researchers are introducing this tool in Ethiopia and Ghana, through the USAID-supported Innovation Lab on Small Scale irrigation (ILSSI), to help farmers manage their water resources more effectively.  The technology has proven successful in reducing irrigation frequency, consequently saving time and labor costs as well as conserving precious water resources.  

Similarly, on request of the Government of Nigeria, researchers are developing new information and communication technology applications in flood-prone regions, such as in Nigeria’s Benue River Basin, to support flood early warning systems, reduce risks posed by flooding, and to put floodwaters to productive agricultural use.

Finally, WLE researchers are also exploring options to improve farmers’ access to financial information and credit, which has been a key constraint in the past. Activities include training to improve financial literacy of both farmers and financial institutions, improving access to loans for irrigation technologies, and assessing the potential for private-public partnerships in irrigation

Small-Scale Irrigation: Present & Future from Water, Land and Ecosystems (WLE)

Potential impacts and benefits

The AgWater Solutions project provided estimates of the potential reach (millions of people) and additional household net revenue (billions of US dollars annually) for a number of different on-farm and local community water solutions across sub-Saharan Africa. Now, new research provides insights into other potential impacts and benefits, including nutrition, health and climate resilience.   

For example, the potential for small-scale irrigation to improve gender equity and nutrition security has been an understudied component of agricultural water management research in the past. Now, as part of the ILSSI program, WLE researchers are unpacking the complex relationships among water, nutrition, health and gender. Also farmers’ resilience may be strengthened through irrigation solutions, especially through water-smart agriculture that considers water variability and climate uncertainties.

Small-scale irrigation continues to grow in sub-Saharan Africa, and the potential for huge, beneficial impacts remain. While the investment pathways originally identified are still valid, new technologies and insights open doors for even greater impacts. Innovative solutions for small-scale irrigation hold the promise of large-scale benefits beyond yields and income, including gender equality, nutrition security and climate resilience.

Texas A&M University System Member