Using beryllium-7 to monitor the relative proportions of interrill and rill erosion from loessal soil slopes in a single rainfall event

CORC > 水土保持研究所 > 中国科学院水利部水土保持研究所 > 水保所知识产出(1956-2013)

	Using beryllium-7 to monitor the relative proportions of interrill and rill erosion from loessal soil slopes in a single rainfall event
	Liu Gang ; Yang Ming Yi ; Warrington D. N
刊名	EARTH SURFACE PROCESSES AND LANDFORMS
	2011
卷号	36 期号:4 页码:439-448
关键词	deposition runoff hillslope geomorphology sediments simulated rainfall
通讯作者	Yang, MY
英文摘要	Quantifying the relative proportions of soil losses due to interrill and rill erosion processes during erosion events is an important factor in predicting total soil losses and sediment transport and deposition. Beryllium-7 ((7)Be) can provide a convenient way to trace sediment movement over short timescales providing information that can potentially be applied to longer-term, larger-scale erosion processes. We used simulated rainstorms to generate soil erosion from two experimental plots (5 m 4 m; 25 degrees slope) containing a bare, hand-cultivated loessal soil, and measured (7)Be activities to identify the erosion processes contributing to eroded material movement and/or deposition in a flat area at the foot of the slope. Based on the mass balance of (7)Be detected in the eroded soil source and in the sediments, the proportions of material from interrill and rill erosion processes were estimated in the total soil losses, the deposited sediments in the flat area, and in the suspended sediments discharged from the plots. The proportion of interrill eroded material in the discharged sediment decreased over time as that of rill eroded material increased. The amount of deposited material was greatly affected by overland flow rates. The estimated amounts of rill eroded material calculated using (7)Be activities were in good agreement with those based on physical measurements of total plot rill volumes. Although time lags of 45 and 11 minutes existed between detection of sediment being removed by rill erosion, based on (7)Be activities, and observed rill initiation times, our results suggest that the use of (7)Be tracer has the potential to accurately quantify the processes of erosion from bare, loessal cultivated slopes and of deposition in flatter, downslope areas that occur in single rainfall events. Such measurements could be applied to estimate longer-term erosion occurring over larger areas possessing similar landforms. Copyright (C) 2010 John Wiley & Sons, Ltd.
收录类别	SCI
语种	英语
公开日期	2012-05-31
内容类型	期刊论文
源URL	[http://ir.iswc.ac.cn/handle/361005/4707]
专题	水土保持研究所_水保所知识产出(1956-2013)
推荐引用方式 GB/T 7714	Liu Gang,Yang Ming Yi,Warrington D. N. Using beryllium-7 to monitor the relative proportions of interrill and rill erosion from loessal soil slopes in a single rainfall event[J]. EARTH SURFACE PROCESSES AND LANDFORMS,2011,36(4):439-448.
APA	Liu Gang,Yang Ming Yi,&Warrington D. N.(2011).Using beryllium-7 to monitor the relative proportions of interrill and rill erosion from loessal soil slopes in a single rainfall event.EARTH SURFACE PROCESSES AND LANDFORMS,36(4),439-448.
MLA	Liu Gang,et al."Using beryllium-7 to monitor the relative proportions of interrill and rill erosion from loessal soil slopes in a single rainfall event".EARTH SURFACE PROCESSES AND LANDFORMS 36.4(2011):439-448.