水土保持学报2017，Vol.31Issue(2)：1-6,6.DOI:10.13870/j.cnki.stbcxb.2017.02.001
土壤分离能力测定的不确定性分析
Uncertainty Analysis of Soil Detachment Capacity Measurement
摘要
Abstract
Soil detachment capacity is the maximum soil detachment rate when sediment concentration of overland flow is zero.It is the foundation of the determination of rill erodibility and soil critical shear stress,and wide application of the process-based soil erosion models.A detailed analysis indicated that runoff plot could not be used to measure soil detachment capacity by overland flow.The potential effects on soil detachment capacity and their mechanisms were fully discussed in the aspects of the type and size of hydraulic flume,representation of soil sampling,length of soil sample,disturbance of soil sample,initial soil moisture,and duration of flowing water scouring.The uncertainties in soil detachment capacity measurement were systematically analyzed.This paper is helpful to understand the dynamic mechanism of soil erosion processes,and to choose the rational methods and experimental procedures to measure soil detachment capacity by overland flow.关键词
土壤侵蚀/水土保持/预报模型/坡面径流/试验水槽Key words
soil erosion/soil and water conservation/prediction model/overland flow/hydraulic flume分类
农业科技引用本文复制引用
张光辉..土壤分离能力测定的不确定性分析[J].水土保持学报,2017,31(2):1-6,6.基金项目
国家自然科学基金重点项目(41530858) （41530858）
国家自然科学基金项目(41271287) （41271287）
国家自然科学基金创新群体项目(41621061) （41621061）
