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根据东北沟小流域观测裸地、等高耕种、水平阶等3种措施径流小区的径流量和泥沙量资料,研究不同措施下径流泥沙与降雨等因素的相互关系,采用典型相关分析法分析不同措施下影响土壤侵蚀的主要因子。结果表明,在裸地和等高耕作措施下,径流深在土壤侵蚀特征因子中起主要作用,而在水平阶措施下,土壤流失模数在土壤侵蚀特征因子中起主要作用。不同措施下土壤侵蚀影响因子不同,在裸地和水平阶措施下,可以通过降雨量、雨强和雨前土壤含水量等土壤侵蚀影响因子来预测径流深和土壤流失模数,而在等高耕作措施下,用降雨量、雨强、降雨侵蚀力等土壤侵蚀影响因子预测土壤侵蚀特征因子更为准确。
According to the data of runoff and sediment of three kinds of runoff plots, such as bare land, contour cultivation and horizontal runoff in Dongbeigou watershed, the correlation between runoff sediment and rainfall under different measures was studied, and the correlations were analyzed by canonical correlation analysis Analysis of the main factors affecting soil erosion under different measures. The results showed that runoff depth played a major role in soil erosion characteristics under bare land and contour tillage. However, under horizontal measures, soil loss modulus played a major role in soil erosion characteristics. Under different measures, the influencing factors of soil erosion are different. Under bare soil and horizontal measures, the runoff depth and soil loss modulus can be predicted by the influence factors of soil erosion such as rainfall, rainfall intensity and rainfall before soil moisture. Under the tillage measures, it is more accurate to predict the characteristic factors of soil erosion by the influencing factors of soil erosion such as rainfall, rainfall intensity and rainfall erosivity.