【摘要】 以小流域为单元进行土壤侵蚀空间变化的定量动态研究，是探索土壤侵蚀规律和评价流域治理效益的一个重要途径和内容．以陕北黄土丘陵区安塞县纸坊沟流域内的两个小流域为研究实例，在分析野外小区观测资料建立土壤侵蚀模型的基础上，应用由ＡＲＣ／ＩＮＦＯ地理信息软件系统支持建立的空间信息数据库系统和土壤侵蚀模型相结合的方法，进行了小流域次降雨土壤侵蚀空间变化的定量计算．进而研究了流域内侵蚀强度的空间变化规律及其与地貌和土地利用的关系。实测资料检验结果表明，研究建立的预报方法，具有较高的计算精度。更多还原

【Abstract】 Taking two small catchments in Zhifanggou watershed in the loess hilly region near Ausal county of Northern Shaanxi as study example, the prediction models of soil erosion have been developed on the basis of analysing the field observation data, and the spatial information database about soil erosion affecting factors has been established under the support of ARC/INFO software of geographical information system (GIS). Using the methods of integrate GIS with soil erosion models, the soil erosion of single rainfall in small watershed was quantitatively and spatially estimated. The spatial variation law of soil erosion intensities within a small watershed and the relationships between erosion intensities and landform or land use were researched. The results of testing from observed data showed that the method has a good prediction accuracy.更多还原