Splash erosion and selective characters of aggregate for typical Black soil under artificial rainfall
Separation and migration of soil particles via raindrop erosion are determinants for slope erosion. The composition and ratio of soil particle are most significant soil factors affecting splash erosion (Yang et al, 2000; Fan et al, 1993). In the past, researches on splash erosion were mainly conducted on the loess plateau with the loess as the research object. Zhao (2001 ) pointed out the effect of splash erosion s process on selectivity of soil particles was not obvious but with strong random, and proposed that with the increase in splashing kinetic energy, the splash and migration amount of coarse grain increased while the selectivity gradually emerged. Investigations were more confined to the rule of soil splash erosion with single index, while the spatial distribution of soil particles, composition of aggregates, selectivity of aggregates and other characteristics related were hardly considered, and no quantitative study was carried out ( Cheng, 2007). The main form of soil erosion is water erosion and is constantly exacerbated in black soil region of Northeast China (Han et al, 2005 ). This paper quantitatively examined the migration amount of soil particles, selective characteristics of aggregates and distribution in horizontal space of aggregates in the top cultivated soil (the higher content of >0. 25mm aggregates) of the typical black soil zone under artificial rainfall condition. The purposes of this paper were to understand black soil erosion process, and to provide reference for better utilization and management of black soil.
typical black soil splash erosion aggregate selectivity spatial distribution
Yiyang Zhou Enheng Wang Xiangwei Chen Ruiying Fan
College of Forestry, Northeast Forestry University, Harbin, 150040, China
国际会议
哈尔滨
英文
63-65
2010-07-13（万方平台首次上网日期，不代表论文的发表时间）