Aggregates stability and water erosion in Andosols of the Canary Islands

摘要: The aim of this paper is to assess the mechanisms water erosion in andic soils using two tests, which a certain way simulate principal aggregate destruction process erosion—water dispersion and raindrops impact—and compare them with aggregation observed material dettached by inter-rill (sediments) experimental plots natural rain. In accordance obtained results, erosive these seems come about through picking off surface larger aggregates, due impact raindrops. intensity pull fragment size from aggregates depends on kinetic energy drops (rain intensity), but generally ranges between 0ċ2 0ċ5 mm. Therefore initially proceeds washing down smaller (<0ċ5 mm) (of less bulk density than 0ċ4 Mg m−3 against 0ċ9 Mg m−3), enriching soil sized which, being fragmented raindrops, supply new for erosion. Copyright © 2002 John Wiley & Sons, Ltd.