Rill erosion in Iowa, USA.
Severe sheet and rill erosion on highly erodible soils in northwest Iowa after heavy rains. The spring rains fell on soils that had no protection against soil erosion.
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=2953&site=PhotoGallery