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USGS Navajo Land Use Planning Project (NLUPP)

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Dune mobility maps: The likelihood of dune activation can be modeled based on climatic variables within a geographic information system (GIS). Grid points on the maps below are locations where atmospheric measurements have been recorded.
maps of potential dune mobility

The two maps show maps of potential dune mobility based on two periods of time during normal precipitation (1982-1986) and drought (2000-2002). Pink background areas show the location of dune fields, having both inactive and active dunes. Sand dune mobility models are based on:

Sand dune mobility (M) = W/(P/PE)


Sand transport potential (W) = Percent of time wind velocities are high enough to transport sand grains,


Effective precipitation (P/PE) = Ratio of total precipitation (P) over potential evapotranspiration (PE)

The maps layers show climate information (P/PE) and distribution of sand dunes. Where dunes coincide with low P/PE, the area is likely to have blowing sand and dust.

Maps provided by Margaret Hiza-Redsteer, USGS Flagstaff, AZ.

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