Sediment Load in Runoff Under Laboratory and Field Simulated Rainfall

编号 zgly0000334028

文献类型 期刊论文

文献题名 Sediment Load in Runoff Under Laboratory and Field Simulated Rainfall

学科分类 220.1040;森林土壤学

作者 JINKe  WouterSchiettecatte  KoenVerbist  DonaldGabriels  RogerHartmann  CAIDian-xiong 

作者单位 SoilandFertilizerInstitute 

母体文献 Agricultural Sciences in China（中国农业科学：英文版） 

年卷期 2004,3(1)

页码 31-36

年份 2004 

分类号 S157.1 

关键词 径流  沉积物负载  模拟降雨  流力  水土流失 

文摘内容 Soil erosion is one of the most important problems in the Loess Plateau of China affecting sustainable agriculture. Near Luoyang (Henan Province, China), field plots were constructed to measure soil erosion rates under conventional tillage practices using field-simulated rainfall.Field rainfall experiments were carried out to compare previous results from laboratory rainfall simulations on the same soil for interrill conditions. Although in the laboratory experiments, a strong correlation was found betweenthe stream power of the runoff water and the unit sediment load, this sediment transport equation overestimated the field rainfall simulation results. Another sediment transport equation derived by Nearing et al. for rill erosion was in better agreement with the results of the field experiments, although it also overestimated these values. The measured sediment load values during the field rainfall simulations were also lower than those found during field experiments on the same soil but with a loosened surface layer. This difference indicates the importance of soil physical condition of surfce like soil structure and aggregate size, which may contribute to the discrepancy between the field and laboratory experiment results。