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本文通过实测资料分析得到砒砂岩区土壤侵蚀的基本特点是以冻融风化非径流土壤侵蚀为主,以沟壑中暴雨径流形成的股流为动力核心搬运输移泥沙,重力和风力仅对非径流产沙起加速作用,人类活动对坡面起破坏作用。小流域上、中、下游冻融风化土壤侵蚀的分配比例是76.1％、17.5％和6.4％,说明支毛沟头是土壤侵蚀的关键部位,沟顶坡、沟谷坡和沟床面积分别为22％、75％和3％,沟谷坡产沙量占总产沙量的90％,说明沟谷坡是产沙的关键部位。针对该地区的产沙规律,试验证明在砒砂岩区支毛沟中以沙棘灌木植物作为拦沙的坝型框架材料是可行的,并给出了明确的物理图形,与沟道淤地坝工程相配套,使粗细沙分选、泄流、生态恢复于一体,发挥综合功能。
Based on the measured data, the basic characteristics of soil erosion in the 砒 sandstone area are that the soil erosion is dominated by freeze-thaw weathering and non-radial flow, and the stock flow formed by stormwater run-off in the gully is the core of transportation and transportation of sediment. The gravity and wind power are only non- Runoff and sediment play an accelerating role, human activities on the slope from damaging effect. The proportions of soil erosion of freezing, thawing and thawing in the upper, middle and lower reaches of the small watershed were 76.1%, 17.5% and 6.4%, respectively. The results showed that the head hair plume was the key part of soil erosion. The area of ditch roof, ditch valley and ditch bed were 22 %, 75% and 3% respectively. The sediment yield in the valley slope accounts for 90% of the total sediment yield, indicating that the valley slope is the key part of sand production. According to the law of sediment production in the area, the experiment proves that it is feasible to use seabuckthorn shrub plant as the dam-type frame material in the sand-furrow area furrows and give a clear physical figure, Matching, so that the thickness of sand sorting, discharge, ecological restoration in one, play a comprehensive function.