Importance of Outlier Detection in Spatial Analysis of Wind Erosion

摘要

Spatial outliers in wind erosion are associated with severe weather events, so high rate of erosion or sedimentation in relevance to their spatial vicinity is called outlier. The aim of this paper is to investigate the influence of outliers on variogram model and their parameters in east of Iran. For measuring of soil erosion and sedimentation, some pins were established in nested grids. Decreasing and increasing of pin height, show sedimentation and erosion, respectively. Spatial analysis illustrate that outliers locate in NW-SE direction roughly in the same direction of predominant wind. The maximum amount of outlier is 22 cm soil sedimentation.