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- W2382453821 abstract "By map overlapping,statistic analysis and buffer analytical methods,data of soil erosion and terrain slope,land use/land cover situation,soil type and distribution,annual average downfall days, buffer zone of a river and buffer zone of a road in Lancang River drainage area of Yunnan in Southwest China′s longitudinal mountain range were obtained under the support of Arcview 3.2 and Arc/Info 8.1;then the corresponding soil erosion synthesized indexes of each factor were calculated.The results indicated that: a) In the case of different slope gradients,soil erosion at 15°~25° is the strongest,at 8°~15° and 4°~8° is intermediate and 25° is the weakest. b) The order of the descending degrees of soil erosion of different land use types is steep dryland,hilly dryland,middle coverage grassland,mountainous dryland,high cover age grassland,mountainous paddy field,sparse woodland,shrub land,woodland;and in general,erosion on sloping dryland is more serious than that on grassland,and grassland is more serious than woodland.c)Among various soil types,erosion on yellow soil and lime soil is most prominent,besides them are red soil,yellow brown soil,paddy soil,brown soil,dark brown forest soil,laterite soil,brown soil,lateritic red soil and black clay soil.d)Erosion in river buffer and road buffer areas is more serious than that of the entire region,and is a little stronger in river buffer than in road buffer.e) When the number of downfall days is less than 20 annually,soil erosion degree increases along with the increase of downfall days.Whereas when downfall days exceed 20 annually,erosion degree is relatively low because the antecedent rain wash has swept off loose materials on the earth's surface.Overall,the result can provide scientific basis for preventing soil and water loss and of reducing river and reservoir sediment." @default.
- W2382453821 created "2016-06-24" @default.
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- W2382453821 date "2006-01-01" @default.
- W2382453821 modified "2023-09-25" @default.
- W2382453821 title "Spatial analysis on soil erosion of Lancang River Watershed in Yunnan Province under the support of GIS" @default.
- W2382453821 hasPublicationYear "2006" @default.
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