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Research ArticleResearch Section

Geospatial assessment of agricultural lands critical to air quality on the Columbia Plateau, Washington State

D.G. Chandler, S. Blaesing-Thompson and A. Busacca
Journal of Soil and Water Conservation July 2004, 59 (4) 184-189;
D.G. Chandler
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S. Blaesing-Thompson
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A. Busacca
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ABSTRACT:

The soils and landscape of the Columbia Plateau in eastern Washington and northeastern Oregon have developed primarily as a result of redistribution of glacial outwash sediments by wind. Contemporary agricultural disturbance of regional soils facilitates wind erosion that impairs downwind air quality by the introduction into the atmosphere of large quantities of particulate aerosols less than 10 microns in aerodynamic diameter (PM10). Reducing these agricultural contributions to PM10 concentrations in urban areas has been identified as a critical component of regional compliance under the Clean Air Act. We designed a sampling and analysis scheme to develop empirical relationships first between total mass flux during wind tunnel erosion trials and soil aggregate size distributions; and second between soil PM10 emission potentials and primary particle size distributions. We then applied those empirical relationships to predict potential total soil erodibility and potential PM10 emissions at a larger set of field soil sample sites. The resultant point predictions were interpolated spatially using geostatistical methods to generate a prediction map of PM10 emissions hazard, which is similar to the U.S. Department of Agriculture (USDA) Farm Services Agency map of air quality conservation priority areas for the Columbia Plateau.

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  • Copyright 2004 by the Soil and Water Conservation Society

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Journal of Soil and Water Conservation: 59 (4)
Journal of Soil and Water Conservation
Vol. 59, Issue 4
July/August 2004
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Geospatial assessment of agricultural lands critical to air quality on the Columbia Plateau, Washington State
D.G. Chandler, S. Blaesing-Thompson, A. Busacca
Journal of Soil and Water Conservation Jul 2004, 59 (4) 184-189;

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Geospatial assessment of agricultural lands critical to air quality on the Columbia Plateau, Washington State
D.G. Chandler, S. Blaesing-Thompson, A. Busacca
Journal of Soil and Water Conservation Jul 2004, 59 (4) 184-189;
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