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4.3 Dams in gully Various forms of slope protection dam are created in valleys on the Loess Plateau. ✓ Stonewall dams ✓ Earth dams ✓ Concrete dams ✓ Gabion dams ✓ Earth-filled bag check-dams ✓ Dams made from loess reinforced with willow ✓ Dams woven from willow ✓ Others (according to the type of material used)

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