水科学进展2016，Vol.27Issue(4)：535-541,7.DOI:10.14042/j.cnki.32.1309.2016.04.007
细沟形态演变对坡面水沙过程的影响
Rill morphology evolution and runoff and sediment yielding processes
摘要
Abstract
In order to investigate the mutual feedback effects of rill morphology evolution on runoff and sediment, var⁃iation characteristics of runoff and sediment during the evolution of rill morphology were studied. In the current work, an indoor soil bin rainfall simulation experiment was performed using a 3⁃D terrain scanning method. Loessial soil was analyzed under rainfall intensities of 66 mm/h, 94 mm/h, and 127 mm/h. Results showed that the evolution of rill morphology had a profound effect on sediment yield, but the impact on runoff was not obvious. The variation in runoff depended mainly on infiltration conditions and crust effect of soil and patterns of runoff production. The runoff produc⁃tion on the slope had a tendency to first increase and then decrease before finally reaching stability. There was an obvi⁃ous relationship between rill morphology evolution and sediment yield; the correlation coefficients of geomorphologic comentropy and soil loss with erosion rate were 0. 954 and 0. 916, respectively. The emergence of rills was found to aggravate the erosion, resulting in a significant increase in sediment concentration. The variation in sediment yield in rainfall of different intensities was basically the same. The more intense the rainfall, the higher sediment concentration after the rill network became stable.关键词
土壤侵蚀/模拟降雨/细沟形态/水沙变化特性Key words
soil erosion/artificial rainfall/rill morphology/variation characteristics of runoff and sediment分类
农业科技引用本文复制引用
张攀,唐洪武,姚文艺,孙维营..细沟形态演变对坡面水沙过程的影响[J].水科学进展,2016,27(4):535-541,7.基金项目
国家自然科学基金资助项目（51409110）；中央级公益性科研院所基本科研业务费专项资金资助项目（ HKY-JBYW-2014-2） The study is financially supported by the National Natural Science Foundation of China （ No．51409110）． （）
