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flag Critical erosion threatens the Fraser River, risking flood defenses, farmland, and wildlife as marshes vanish.

flag The Fraser River in Canada faces a critical erosion issue due to the lack of sediment monitoring, threatening flood defenses, farmland, and wildlife habitats. flag Since the 1970s, the Sturgeon Bank tidal marshes have lost 160 hectares, and the ongoing decline in sediment supply could cause the collapse of these marshes, increasing flood defense costs to tens of billions of dollars. flag The problem stems from dikes built by European settlers that cut off cities from natural sediment sources.

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