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Deltas Spread Fertile Soil to the Sea
三角洲将肥沃土壤输送到海洋
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Deltas form where rivers meet oceans or lakes.三角洲形成于河流入海或入湖处。
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Sediment piles up as water slows and drops its load.水流减缓后携带的泥沙逐渐沉积下来。
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These flat, fan-shaped lands support rich farming and wetlands.这些平坦、扇形的土地适宜农耕和湿地生态。
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The Nile Delta feeds millions in Egypt with fertile fields.尼罗河三角洲肥沃的农田养活了埃及数百万人。
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Mississippi Delta marshes shelter fish, birds, and young crabs.密西西比河三角洲的沼泽为鱼类、鸟类和幼蟹提供栖息地。
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Human dams and levees now reduce natural delta growth.人类修建的大坝和堤防如今抑制了三角洲的自然发育。