径流和土壤是引起水土流失的两个基本因子，采用原状土冲刷法和实地放水冲刷法对北京市八达岭林场油松林地进行土壤抗冲性研究。
The anti-scouring feature of forest land soil was examined by using the undisturbed soil sample washing experiment and the spot washing experiment.
结果表明，水土流失和土壤吸附（含粘粒、矿物质等）可能是本研究地区影响硒有效性的主要因素。
The study shows that the main factors of effect on the Se effectiveness in the zone are probably water, soil loss and soil absorption (clay particles and minerals).
在GIS支持下，利用土壤背景和数字地形模型可实现水土流失潜在可能性分析。
The soil erosion potential possibility can be studied using the soil background map and digital terrain map supported by GIS;
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