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project(11)
water resource(11)
major river(8)
research team(8)
colorado river(7)
mississippi river(6)
river(6)
river system(6)
centuries-long tree ring record(5)
drought(5)
flow(5)
human activity(5)
major river headwater(5)
missouri river basin(5)
missouri river system(5)
past tree-ring reconstructed river discharge(5)
reconstruction(5)
research product(5)
sacramento river(5)
study(5)
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