4Godert W J van Lynden,Stephan Mantel.The role of GIS and remote sensing in land degradation assessment and conservation mapping:some user experiences and expectation[J].JAG,2001,3(1):61-68.
5Lenzi M A,Di Luzio M.Surface runoff,soil erosion and water quality modeling in the Alpone watershed using AGNPS integrated with a Geographic Information System[J].European Journal of Agronomy,1997,6:1-11.
6Desmet P J J,Govers G.A GIS procedure for automatically calculating the USLELS factor on topographically complex land-scape units[J].Journal of Soil and Water Conservation,1996,51(5):427-433.
7Michael A.Fullen.Soil erosion and conservation in northern Europe[J].Progress in Physical Geography,2003,27(3):331-358.