Spatial Scale Consideration of Soil Erosion Monitoring Sites Arrangement
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    Abstract:

    Soil erosion is a mufti-scale spatio-temporal process which has different control process and domination factors at different scale. Therefore, overall arrangement of soil erosion monitoring sites should take the spatial scale effect into consideration. We put forward a scheme for soil erosion monitoring points arrangement based on stratified sampling method with 3-levels control. The first control level took soil erosion type sub-region as control factor at regional scale; the second level took rainfall,gully density, vegetation type,soil type and land-use structure as control factors at smallwatershed scale, and filtrates typical small water- shed;the third level took slope gradient,vegetation fraction, soil type and land-use type as control factors at plot scale, and filtrates typical plot unit. Through this stratified selection of the monitoring location, the placement of control stations is arranged in the outlet of the typical small watershed and runoff plots in typical plot unit. The soil erosion monitoring point arrangement under the spatial scale effect based on stratified sampling method took GIS (geographical information system) as main technology and RS(remote sensing)as main data sources, integrated the current situation of soil and water conservation work, which can improve the rationality and efficiency of soil erosion monitoring points arrangement.

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曾红娟,杨胜天,马力刚,王玉娟.土壤侵蚀监测点布局的空间尺度分析[J].水土保持通报英文版,2009,(2):24-27

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History
  • Received:August 30,2008
  • Revised:December 10,2008
  • Adopted:
  • Online: November 26,2014
  • Published: