Pb-210(ex) depth distribution in soil and calibration models for assessment of soil erosion rates from Pb-210(ex) measurements

doi:10.1360/02wd0460

IEECAS OpenIR > 黄土与第四纪地质国家重点实验室（1985-2004）

	Pb-210(ex) depth distribution in soil and calibration models for assessment of soil erosion rates from Pb-210(ex) measurements
	Zhang, XB; Walling, DE; Feng, MY; Wen, AB
	2003-04
发表期刊	CHINESE SCIENCE BULLETIN
卷号	48 期号:8 页码:813-818
文章类型	Article
摘要	Three soil cores collected from China and UK show the Pb-210(ex) and Cs-137 depth distribution on uncultivated and cultivated land. Depth distributions of the two nuclides are very similar. Those nuclide concentrations are higher in the top horizon and decrease exponentially with depth on uncultivated land while the concentrations are almost uniform throughout the plough layer as a result of mixing associated with cultivation on cultivated land. Pb-210(ex) reference 2 inventory in the Loess Plateau is 573 mBq . cm(-2), a little higher than 520.0 mBq . cm(-2) in UK. Distribution of artificial fallout Cs-137, produced during the nuclear testing period of the late 1950s and 1960s, is in an unsteady state. In contrast, distribution of natural fallout Pb-210(ex) is in a steady state under constant conditions of land environment and erosion processes for a long term, e.g. > 100 years. Therefore, mass balances of Cs-137 and Pb-210(ex) in soil are different. According to its processes of continues deposition from the atmosphere, nature decay and losses with soil losses, Pb-210(ex) steady state mass balance models for cultivated land as well as for uncultivated land are developed to estimate soil erosion rates in this paper. Besides, the proportion of freshly deposited Pb-210(ex) fallout removed by erosion on cultivated land can also be calculated from Pb-210(ex) depth distribution at a reference site of uneroded permanent grass land.
关键词	Pb-210(ex) steady state soil erosion
学科领域	Science & Technology - Other Topics
DOI	10.1360/02wd0460
关键词[WOS]	FALLOUT CS-137 ; CESIUM-137
收录类别	SCI ; SCIE
语种	英语
WOS研究方向	Multidisciplinary Sciences
WOS记录号	WOS:000183995500021
出版者	SCIENCE CHINA PRESS
引用统计	被引频次：41[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/11983
专题	黄土与第四纪地质国家重点实验室（1985-2004）
推荐引用方式 GB/T 7714	Zhang, XB,Walling, DE,Feng, MY,et al. Pb-210(ex) depth distribution in soil and calibration models for assessment of soil erosion rates from Pb-210(ex) measurements[J]. CHINESE SCIENCE BULLETIN,2003,48(8):813-818.
APA	Zhang, XB,Walling, DE,Feng, MY,&Wen, AB.(2003).Pb-210(ex) depth distribution in soil and calibration models for assessment of soil erosion rates from Pb-210(ex) measurements.CHINESE SCIENCE BULLETIN,48(8),813-818.
MLA	Zhang, XB,et al."Pb-210(ex) depth distribution in soil and calibration models for assessment of soil erosion rates from Pb-210(ex) measurements".CHINESE SCIENCE BULLETIN 48.8(2003):813-818.