P oesen J,V andae le K,e t a.l Contribution o f gu lly e rosion to sed mient prodution on cu ltivated lands and rangelands.In E rosion and Sedmi ent y ie ld:G loba l and R eg iona lP erspec tives.W a lling DE(ed.)IAH S P ress:W allingfo rd:1996,251～266.
[2]
B ettH D,D eR ose R C.D ig ita l elevation m ode ls as a too lfo r m onitor ing gu lly eros ion.Internationa l Journa l o f Ap plied Earth O bserva tion and G eo info rm ation,1999,(1):90～101.
[3]
D ero se R C,B Gom ez,M M arden,N A T rustrum.G ullyerosion in M anga tu F ores,tN ew Z ealand,estmi ated fromdig ital e lev ation m ode ls.Earth Surface P rocesses andL andform s,1998,(23):1045～105.
N achte rgae le J,Poesen J.A ssessm en t o f so il losses by ephem eral gully erosion using high a ltitude(stereo)aeria lphotographs.Ea rth Sur face P rocesses and Landfo rm s,1999,(24):693～706.
[10]
Dymond R J,H icks D L.Steep land ero sion m easuredfrom historica l aer ia l photog raphs.Journa l of So il andW ater Conserv asion,1986,41:252～255.
[11]
P la lacio J L,Lopez J.V ideography:A n a ltrnative rem o te sensing too l for gully eros ion.ITC Journa,l 1994,3:233～237.
[12]
O ostw oudW ijdenes D J.,Poesen J,et.a.l Spa tia l distr ibution of gu lly head activ ity and sedim ent supply a long anephem eral channe l in a M ed iterranean env ironm ental. Catena,2000,39:147～16.
[13]
T hom as A W,W e lch R,Jo rdan TR.Q uan tify ing concentra ted flow erosion on cropland w ith aer ia l photogramm etry.Journal o f So il and W ater Conservation,1986,41:249～252.
[14]
F oster G R,U nderstanding ephem era l gu lly erosion.So ilConservation,N ationalA cadem y o f Sc ience P ress,W ashing ton.DC.,1986,90～125.
