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 Wind Erosion and Water Conservation Research: Lubbock, TX
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ARS Home Plains Area Lubbock, Texas Cropping Systems Research Laboratory Wind Erosion and Water Conservation Research Research Publications at this Location





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Title:   Author  item
                                            Zobeck, Teddyitem
                                            Hagen, Lawrenceitem
                                            Stout, Johnitem
                                            Skidmore, Edward
  Submitted to: Agronomy Abstracts
                                    Publication Type: Abstract Only
                                    Publication Acceptance Date: 11/1/1999
                                    Publication  Date: N/A
                                    Citation: N/AInterpretive Summary:
                                Technical Abstract: Soil microrelief is an important surface characteristic that modifies the force of the wind acting on the surface, thereby profoundly affecting the ability of the wind to generate dust and erode soil.  Although a wide variety indexes have been proposed to describe soil surface microrelief, few relate directly to the aerodynamic effect of the wind on the surface  or the abrasion process.  Wind erosion prediction models use a variety of representations or models to describe the effect of surface roughness on wind erosion.  Ridge height, ridge spacing, and random roughness were among the first roughness indexes used in models.  We will discuss the determination and application of several roughness indexes such as the random roughness, wind erosion roughness, and chain roughness indexes. Random roughness is related to aerodynamic roughness, Zo. The effect of ridges on Zo is estimated using physical scale variables  and wind profiles.  The wind erosion roughness index, which relates directly to the fraction of the soil surface susceptible to abrasion, will also be discussed.


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