Author
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Hagen, Lawrence |
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Submitted to: ASA-CSSA-SSSA Annual Meeting Abstracts
Publication Type: Abstract Only Publication Acceptance Date: 7/23/2003 Publication Date: 11/2/2003 Citation: Hagen, L.J. 2003. Effects of field size on wind erosion [abstract]. ASA-CSSA-SSSA Annual Meeting, Denver, Colorado, November 2-6, 2003. Interpretive Summary: N/A Technical Abstract: Field shape, size, and orientation are often manipulated to aid in wind erosion control. The effectiveness of these practices depends on both field surface conditions and the local wind climatology. Field surfaces are generally assumed to be uniform at the beginning of erosion events, but develop gradients in surface conditions along the wind direction as erosion progresses. A physically-based Wind Erosion Prediction (WEPS) model was used to simulate erosion for a range of surfaces and wind regimes. Model results showed that most fields exhibited an intermediate field length with a maximum soil loss per unit area that should be avoided in designing control practices. Moreover, both the proportion of total soil loss in suspension and its PM10 content also increased with field length. Hence, the nature of the offsite impacts of erosion also change with field scale. In general, the erosion reduction by strip- cropping large fields was directly proportional to the direction preponderance level of the erosive winds. |
