dune stabilization and wind-blown dust
DESCRIPTION
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 PresentationTRANSCRIPT
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DUNE STABILIZATION AND WIND-BLOWN DUSTCristina González-MadduxInstitute for Tribal Environmental Professionals
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REGIONAL DUST STORMS
Dust storms in Northern AZ
(NASA Earth Observatory, April 11, 2009)
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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
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SLIDE COURTESY OF MARGARET HIZA, USGS
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SLIDE COURTESY OF MARGARET HIZA, USGS
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PARTLY-FULLY ACTIVE DUNE REGION
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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
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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
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NATIVE SEEDS FOR REVEGETATION
• Sporobolus cryptandrus (sand dropseed) • Oryzopsis hymenoides (Indian ricegrass)• Hilaria jamesii (galleta viva)
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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
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EEOP’S SAND DUNE WEBSITE
http://www4.nau.edu/eeop/dunes/index.asp