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Cristina González-Maddux Institute for Tribal Environmental Professionals. Dune Stabilization and WIND-Blown dust. Dust storms in Northern AZ (NASA Earth Observatory, April 11, 2009). Regional dust storms. - PowerPoint PPT Presentation
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DUNE STABILIZATION AND WIND-BLOWN DUSTCristina González-MadduxInstitute for Tribal Environmental Professionals
REGIONAL DUST STORMS
Dust storms in Northern AZ
(NASA Earth Observatory, April 11, 2009)
CONSEQUENCES FOR HUMAN HEALTH AND LANDSCAPES
Increased dust may aggravate respiratory ailments (indoor and outdoor air quality concerns)
Decreased visibility Damage to infrastructure Deposition of dust on
snowpack – decreases snow albedo, speeds snowpack melt positive feedback loop
SLIDE COURTESY OF MARGARET HIZA, USGS
SLIDE COURTESY OF MARGARET HIZA, USGS
PARTLY-FULLY ACTIVE DUNE REGION
DUNE STABILIZATION EEOP is cosponsoring dune stabilization projects along
with the US Geological Survey Techniques
Mud balls Native plant seeds
“Sand sausages” Wind erosion buffer
USGS RESEARCH, LEAD: MARGARET HIZA
USGS Assessment of sand dunes and the affects of climatic variation on dune mobility in Navajo landhttp://geomaps.wr.usgs.gov/navajo/pubs/Dunehandout.pdf
Factors affecting sand dune mobility on the Navajo Nation, Arizona, U.S.A.http://www.csrl.ars.usda.gov/wewc/icarv/106.pdf
NATIVE SEEDS FOR REVEGETATION
• Sporobolus cryptandrus (sand dropseed) • Oryzopsis hymenoides (Indian ricegrass)• Hilaria jamesii (galleta viva)
PASSIVE DUST MONITORING – DINÉ COLLEGE• Adapted from USGS methodology • Teflon coated pan• Hardware cloth• Marbles (reduces deflation)• 7 ft. tall T-posts-----------------• Dust flux measurement
EEOP’S SAND DUNE WEBSITE
http://www4.nau.edu/eeop/dunes/index.asp