Characterizing land surface erosion from cesium-137 profiles in lake and reservoir sediments

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 成都山地所知识仓储（2009年以前）

	Characterizing land surface erosion from cesium-137 profiles in lake and reservoir sediments
	Zhang, XB; Walling, DE
刊名	JOURNAL OF ENVIRONMENTAL QUALITY
	2005-03-01
卷号	34 期号:2 页码:514-523
ISSN号	0047-2425
合作状况	国际
英文摘要	Recognition of the threat to the sustainable use of the earth's resources posed by soil erosion and associated off-site sedimentation has generated an increasing need for reliable information on global rates of soil loss. Existing methods of assessing rates of soil loss across large areas possess many limitations and there is a need to explore alternative approaches to characterizing land surface erosion at the regional and global scale. The downcore profiles of Cs-137 activity available for numerous lakes and reservoirs located in different areas of the world can be used to provide information on land surface erosion within the upstream catchments. The rate of decline of Cs-137 activity toward the surface of the sediment deposited in a lake or reservoir can be used to estimate the rate of surface lowering associated with eroding areas within the upstream catchment, and the concentration of Cs-137 in recently deposited sediment provides a basis for estimating the relative importance of surface and channel, gully, and/or subsurface erosion as a source of the deposited sediment. The approach has been tested using Cs-137 data from several lakes and reservoirs in southern England and China, spanning a wide range of specific suspended sediment yield. The results obtained are consistent with other independent evidence of erosion rates and sediment sources within the lake and reservoir catchments and confirm the validity of the overall approach. The approach appears to offer valuable potential for characterizing land surface erosion, particularly in terms of its ability to provide information on the rate of surface lowering associated with the eroding areas, rather than an average rate of lowering for the entire catchment surface.
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
类目[WOS]	Environmental Sciences
研究领域[WOS]	Environmental Sciences & Ecology
关键词[WOS]	LOWLAND AGRICULTURAL CATCHMENTS ; SOIL-EROSION ; SUSPENDED SEDIMENT ; RATES ; BUDGETS ; PB-210 ; UK
收录类别	SCI
语种	英语
WOS记录号	WOS:000228014800015
公开日期	2010-11-24
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/2602]
专题	成都山地灾害与环境研究所_成都山地所知识仓储（2009年以前）成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
作者单位	1.Univ Exeter, Dept Geog, Exeter EX4 4RJ, Devon, England 2.Inst Mt Hazards & Environm, Chengdu, Peoples R China 3.Chinese Acad Sci, SKLLQG, Inst Environm, Xian, Peoples R China
推荐引用方式 GB/T 7714	Zhang, XB,Walling, DE. Characterizing land surface erosion from cesium-137 profiles in lake and reservoir sediments[J]. JOURNAL OF ENVIRONMENTAL QUALITY,2005,34(2):514-523.
APA	Zhang, XB,&Walling, DE.(2005).Characterizing land surface erosion from cesium-137 profiles in lake and reservoir sediments.JOURNAL OF ENVIRONMENTAL QUALITY,34(2),514-523.
MLA	Zhang, XB,et al."Characterizing land surface erosion from cesium-137 profiles in lake and reservoir sediments".JOURNAL OF ENVIRONMENTAL QUALITY 34.2(2005):514-523.