Rural farmers in sub-Saharan Africa live under risky conditions. Many
grow low-value cereal crops that depend on a short rainy season, a
practice that traps them in poverty and hunger.
But reliable access to water could change the farmers' perilous
situation. Stanford scientists are calling for investments in
small-scale irrigation projects and hydrologic mapping to help buffer
the growers from the erratic weather and poor crop yields that are
expected to worsen with climate change in the region.
The potential for increased irrigation is there, said Jennifer Burney, a fellow at Stanford's Center on Food Security and Environment.
Burney's team partnered with the Solar Electric Light Fund (SELF)
to measure economic and nutritional impacts of solar-powered
drip-irrigated gardens on villages in West Africa's Sudano-Sahel region.
Burney will present the group's work on small-scale irrigation
Wednesday, Dec. 7, at the fall meeting of the American Geophysical Union in San Francisco.
"Irrigation is really appealing in that it lets you do a lot of
things to break this cycle of low productivity that leads to low income
and malnutrition," said Burney.
Modern irrigation often means multi-billion-dollar projects like
damming rivers and building canals. But Burney says that these projects
have not reached sub-Saharan Africa because countries lack the capital
and ability to carry out big infrastructure projects.
A different approach, gaining popularity in sub-Saharan Africa,
involves cooperation. Individuals or groups, called smallholders,
organize to farm small plots and ensure their access to irrigation.
These projects allow farmers to grow during the dry season and produce
profitable, high-nutrition crops like fruits and vegetables in addition
to the cereal crops they already grow.
Still, only 4 percent of cropland in sub-Saharan Africa is irrigated.
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