山西省砂页岩土石山区土壤侵蚀的基本规律

Basic Law of Soil Erosion in the Earthy and Rocky Mountainous Area Mainly Composed of Shale in Shsnxi Province

砂页岩土石山区是山西高原水土流失最严重的地区。经对该区岩土性质及岩土组合与水土流失强度之间的关系进行调查分析，结果表明：随着岩土抗蚀能力的增大，土壤侵蚀模数减小，径流模数增大；随着岩石裸露程度的增大，土壤侵蚀模数减小，径流模数增大。就全区而言，具有土壤侵蚀模数越大，径流模数越小的特点。

The rocky and earthy mountainous area of the loess plateau in Shanxi is the most serious soil loss area in this poper, the relations between the intensity of soil loss are analysed.The results show that modulus of soil erosion decreases and modulus of run off increases with increasing of soil erosion resistance capacity or degree of expeure of rock.In the whole area, the larger the modulus of soil erosion. the smaller is the modulus of run off.