不同措施下土壤侵蚀特征值及其影响因子典型相关分析  

Canonical correlation analysis of factors of erosion impact and erosion characteristics under different approaches

作　　者：丁新辉[1] 谢永生[1,2] 魏富娟 骆汉[1] DING Xin-hui XIE Yong-sheng WEI Fu-juan LUO Han(Institute of Soil and Water Conservation, Chinese Academy of Sciences and the Ministry of Water Resources, ]＇angling 712100, China College of Resources and Environment,Northwest Agriculture ＆ Forest University, Yangling 712100, China College of Landscape Architecture and arts ,Northwest Agriculture ＆ Forest University, Yangling 712100, China)

机构地区：[1]中国科学院水利部水土保持研究所,陕西杨凌712100 [2]西北农林科技大学资源环境学院,陕西杨凌712100 [3]西北农林科技大学风景园林艺术学院,陕西杨凌712100

出　　处：《泥沙研究》2017年第5期44-49,共6页Journal of Sediment Research

基　　金：国家重点研发计划项目(2016YFC0503702);河北省水利科研项目(2014-28);国家科技支撑计划项目(2011BAD31B01)

摘　　要：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。The runoff and sediment of three approaches （bare land,contour cultivation,level terrace） in the northeast gully watershed were observed.The relationship between runoff,sediment and rainfall and other factors were studied.The Canonical Correlation Analysis method were used to analysis the soil erosion characteristics.Under the bare land and contour tillage approaches,runoff depth played a main role in theⅠtypical variable.Under the level terrace measure,soil erosion modulus played a main role in theⅠtypical variable.Redundant index analysis showed that under the approaches of bare land and level terrace,theⅠtypical variables in soil erosion characteristic factor could be well predicted by erosion impact factors,but the impact factors of soil erosion under the three measures were not predicted well by erosion characteristics factors.In the bare land and level terrace,the rainfall,rainfall intensity and antecedent soil moisture and other erosion factors could predict runoff and soil erosion modulus.While in high tillage,soil erosion factors to predict the characteristics of soil erosion factor is more accurate with the rainfall,rainfall intensity,rainfall erosion force.

关 键 词：侵蚀特征因子 侵蚀影响因子 典型相关分析 冗余度 

分 类 号：S157[农业科学—土壤学]