中国水土保持科学2011，Vol.9Issue(3)：18-25,8.
基于LUCC的冀北土石山区东北沟流域土壤侵蚀时空变化分析
Temporal and spatial variability of soil erosion in Dongbeigou Watershed in northern mountainous area, Hebei Province, based on Land Use/Cover Change (LUCC)
摘要
Abstract
Land-use has a direct effect on the changeof soil erosion intensity through changing vegetation cover, soil property and runoff velocity. The Dongbeigou Watershed with an area of 19.34 km2 was chosen as the study area. Based on climate, vegetation coverage, soil, land-use survey and Quickbird image data in 1990 and 2009, the change characteristics of land-use and soil erosion were revealed by means of the shift matrix of land-use and Revised Universal Soil Loss Equation (RUSLE) supported by GIS. The results showed: the forestland increased from 38.56％ in 1990 to 55.83％ in 2009 compared to the decrease of grassland, cropland and barren land. The main conversion happened between forestland and grassland. The annual average soil erosion modulus decreased from 5 136. 13 t/(km2·a) in 1990 to 1 823.30 t/( km2· a) in 2009. The soil erosion intensity decreased significantly. The area where the slight soil erosion (200 - 2 500 t/( km2· a) ) happened constituted 32.78％, and the area where the moderate soil erosion (2 500 - 5 000 t/( km2· a) ) happened constituted 28.49％ in 1990, whereas, in 2009 the area where slight soil erosion happened constituted 33.25％, and where little slight erosion soil erosion (＜200 t/(km2·a)) happened constituted 28.49％. The average soil erosion modulus of different land use types declined greatly, but there were great differences among the soil erosion modulus of different land use types. The soil loss rate happening in forestland and residential land was low, but the soil loss rate happening in barren land was high. The barren land is the key area of soil and water conservation in future.关键词
土壤侵蚀/RUSLE/土地利用/覆盖变化/冀北土石山区/东北沟流域Key words
soil erosion/ RUDLE/ land use/cover change (LUCC)/ northern mountainous area of Hebei Province/ Dongbeigou Watershed引用本文复制引用
吕明权,王继军,江青龙,张怀,郝晓东..基于LUCC的冀北土石山区东北沟流域土壤侵蚀时空变化分析[J].中国水土保持科学,2011,9(3):18-25,8.基金项目
水利部公益项目"冀北山区生态输水小流域治理模式与关键技术"(200901051) （200901051）
"十二五"国家科技支撑计划"农田水土保持工程与耕作关键技术"(2011BAD31B01) （2011BAD31B01）
