9Godert 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.
10Lenzi 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.
