Sheet erosion
Sheet and rill erosion in Iowa, USA.
Image Credit: Lynn Betts, USDA-NRCS, 1999 http://photogallery.nrcs.usda.gov/netpub/server.np?find&catalog=catalog&template=detail.np&field=itemid&op=matches&value=2959&site=PhotoGallery
Sheet erosion: Soil removed in a uniform layer, lowest movement of water
