Spatial patterns of Cs-137 inventories and soil erosion from earth-banked terraces in the Yimeng Mountains, China

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 > 山地表生过程与生态调控重点实验室

	Spatial patterns of Cs-137 inventories and soil erosion from earth-banked terraces in the Yimeng Mountains, China
	Zhang, Yunqi 1,2; Long, Yi3 ; An, Juan2 ; Yu, Xingxiu2 ; Wang, Xiaoli2
刊名	JOURNAL OF ENVIRONMENTAL RADIOACTIVITY
	2014-10-01
卷号	136 页码:1-9
关键词	Earth-banked terraces Yimeng Mountains Cs-137 inventory Soil erosion
ISSN号	0265-931X
通讯作者	Yunqi Zhang
英文摘要	The Yimeng Mountains is one of China's most susceptible regions to soil erosion. In this region, slopes are composed of granite- or gneiss-derived soils that are commonly cultivated using earth-banked terraces. Based on the Cs-137 measurement for nine reference cores, the present study analysed the spatial patterns of Cs-137 inventory and soil erosion using 105 sampling points in a seven-level earth-banked terrace system. The mean Cs-137 inventory, standard deviation, coefficient of variation, and allowable error for the nine reference cores were 987 Bq m(-2), 71 Bq m(-2), 7%, and 6%, respectively, values that may reflect the heterogeneity of the initial Cs-137 fallout deposit. Within each terrace, the Cs-137 inventory generally increases from the rear edge to the front edge, accompanied by a decrease in the erosion rate. This results from planation by tillage and rainfall runoff during the development of the earth-banked terraces. Across the entire seven-level terrace system, Cs-137 inventories decrease from the highest terrace downwards, but increase in the lower terraces, whereas erosion rate displays the opposite trend. These trends are the result of the combined effects of the earth-bank segmented hillslope, the limited protection of the earth banks, and rainfall runoff in combination with tillage. The high coefficients of variation of Cs-137 inventories for the 21 sampling rows, with a mean value of 44%, demonstrate the combined effects of variations in original microtopography, anthropogenic disturbance, the incohesive soils weathered from underlying granite, and the warm climate. Although earth-banked terraces can reduce soil erosion to some extent, the estimated erosion rates for the study area are still very high. (C) 2014 Elsevier Ltd. All rights reserved.
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]	CULTIVATED LAND ; CESIUM-137 MEASUREMENTS ; AGRICULTURAL CATCHMENT ; FALLOUT RADIONUCLIDES ; NORTHEAST CHINA ; RIVER BASIN ; RATES ; DEPOSITION ; REGION ; REDISTRIBUTION
收录类别	SCI
原文出处	http://www.sciencedirect.com/science/article/pii/S0265931X14001301
语种	英语
WOS记录号	WOS:000340221100001
公开日期	2014-12-19
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/7581]
专题	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.Sichuan Agr Univ, Dujiangyan 611830, Sichuan, Peoples R China 2.Linyi Univ, Coll Resource & Environm Sci, Shandong Prov Key Lab Soil Conservat & Environm P, Linyi 276005, Shandong, Peoples R China 3.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Sichuan, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Yunqi,Long, Yi,An, Juan,et al. Spatial patterns of Cs-137 inventories and soil erosion from earth-banked terraces in the Yimeng Mountains, China[J]. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY,2014,136:1-9.
APA	Zhang, Yunqi,Long, Yi,An, Juan,Yu, Xingxiu,&Wang, Xiaoli.(2014).Spatial patterns of Cs-137 inventories and soil erosion from earth-banked terraces in the Yimeng Mountains, China.JOURNAL OF ENVIRONMENTAL RADIOACTIVITY,136,1-9.
MLA	Zhang, Yunqi,et al."Spatial patterns of Cs-137 inventories and soil erosion from earth-banked terraces in the Yimeng Mountains, China".JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 136(2014):1-9.