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Critical erosion threatens the Fraser River, risking flood defenses, farmland, and wildlife as marshes vanish.
The Fraser River in Canada faces a critical erosion issue due to the lack of sediment monitoring, threatening flood defenses, farmland, and wildlife habitats.
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.
The problem stems from dikes built by European settlers that cut off cities from natural sediment sources.
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La erosión crítica amenaza al río Fraser, poniendo en riesgo las defensas contra inundaciones, las tierras de cultivo y la vida silvestre a medida que desaparecen los pantanos.