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USGS Navajo Land Use Planning Project (NLUPP)

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Mapping and measuring landscape changes: Dune migration, stream channel migration, and arroyo incision are major concerns on the Navajo Nation. NLUPP scientists are attempting to understand how climate conditions, surficial deposits, plant cover, land use history, and others affect sediment supply (deposition, erosion, sediment, and channel migration). Below is an example of a map showing how much the Little Colorado River channel has migrated over time base on historic to recent aerial photography taken in the region of area called Old Leupp on the west side of the Navajo Nation, Arizona. Dry alluvial channels are a major source for dust during drought. Migration of stream channels can cause economic impacts on agriculture and infrastructure.

Channel migration history map of the Little Colorado River
(Map source: Debra Block, USGS Flagstaff, AZ)

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