As saltwater advances, Gambian farmers rethink how to protect rice fields

Villagers in Kiang Jifarong, Gambia have spent a decade retreating from rice fields along the Bintang Bolong estuary as saltwater intrusion turns productive lowland barren, forcing families who once grew their own rice to buy imported grain instead. Farmers describe yellowing leaves and hollow grains as the telltale signs, and some abandoned fields eight years ago after repeated failures.

A UN-backed project using concrete dikes in nearby Tendaba reportedly reduced salt intrusion and improved yields, but sustainable development specialist Kawsu Jammeh warns that concrete barriers built in the wrong place, or by contractors unfamiliar with wetland hydrology, can trap saltwater and make hyper-salinity worse. He traces some of the region's salt problems back to sandbag interventions removed in 2005 that permanently altered natural tidal flow.

Jammeh instead favors the traditional seasonal earthen dikes, which allow natural water movement, and points to newer 'gated dikes' in Senegal and Guinea-Bissau that can be opened to flush salt back out with the rains. The agriculture ministry has distributed two salt-tolerant rice varieties that mature faster and are proving more reliable as rainfall patterns shift.

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