VALIDATING A BASIC ASSUMPTION OF USING CESIUM-137 METHOD TO ASSESS SOIL LOSS IN A SMALL AGRICULTURAL CATCHMENT

doi:10.1002/ldr.2708

ISWC OpenIR > 水保所科研产出--SCI > 2017--SCI

	VALIDATING A BASIC ASSUMPTION OF USING CESIUM-137 METHOD TO ASSESS SOIL LOSS IN A SMALL AGRICULTURAL CATCHMENT
	Ni, L. S.1,2; Fang, N. F.1,2; Shi, Z. H.2,3; Chen, F. X.4; Wang, L.1,2; Fang, NF (reprint author), Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, 26th Xinong Rd, Yangling 712100, Peoples R China.
文章类型	Article
	2017
发表期刊	LAND DEGRADATION & DEVELOPMENT
ISSN	1085-3278
通讯作者邮箱	fnf@ms.iswc.ac.cn
卷号	28 期号:5 页码:1772-1778
摘要	Although the fallout radionuclide Cs-137 technique has been widely used to provide soil redistribution estimates in recent decades, some researchers have recently challenged the usefulness of this technique. Thus, it is necessary to evaluate the usefulness of the Cs-137 technique to study soil redistribution, especially in areas that suffer from severe soil erosion and where the Cs-137 inventory distributions vary. This study analyses the abundance of Cs-137 deposited in sediment trapped by a check dam over 31 years in a small agriculture catchment in the Loess Plateau, which has experienced some of the most extensive agricultural soil erosion in the world. The Cs-137 inventory and soil loss were evaluated, and the results indicated that the sediment deposition rate behind the check dam was approximately 38 cm/year. The specific soil erosion rate of the catchment is estimated to be 178 t ha(-1) year(-1). A geochemical properties fingerprinting method indicated that the ratio of the inter-gully erosion from cropland to gully erosion was 0.46:0.54 during the investigated period of 31-year period. Our results suggest that the Cs-137 technique cannot be directly used in the study catchment. Gully erosion is the main type of soil erosion that occurs in the loess catchment, and the amount of gully erosion changes from year to year. Therefore, the abundance of Cs-137 cannot be used to estimate soil redistribution where gully erosion is severe. However, after calibration, the inter-gully soil loss was consistently related to Cs-137 abundance, which means that the Cs-137 technique can be used at the plot or slope scale on the Loess Plateau. Our results also reveal the particle-size selectivity of soil detachment and sediment deposition during runoff-erosion events. The average Cs-137 content of the fine group couplets is 63% greater than the Cs-137 content of the coarse group. When the studied section spans more than 15 years, the Cs-137 inventory is consistent (R-2 = 0.95, p < 0.01) with soil loss, which means that the selectivity may be offset over a long period. Our results confirm that the Cs-137 method requires careful planning when applied at the catchment scale. Copyright (C) 2017 John Wiley & Sons, Ltd.
关键词	Cesium-137 Method Soil Erosion Catchment Fingerprinting Method Check Dam
学科领域	Environmental Sciences & Ecology ; Agriculture
DOI	10.1002/ldr.2708
URL	查看原文
收录类别	SCI
出版地	HOBOKEN
语种	英语
WOS记录号	WOS:000407990500026
出版者	WILEY
项目资助者	National Natural Science Foundation of China [41525003, 41671282] ; National Natural Science Foundation of China [41525003, 41671282]
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	sbir.nwafu.edu.cn/handle/361005/7963
专题	水保所科研产出--SCI_2017--SCI
通讯作者	Fang, NF (reprint author), Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, 26th Xinong Rd, Yangling 712100, Peoples R China.
作者单位	1.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, 26th Xinong Rd, Yangling 712100, Peoples R China 2.Chinese Acad Sci, Inst Soil & Water Conservat, Yangling 712100, Peoples R China 3.Minist Water Resources, Yangling 712100, Peoples R China 4.Huazhong Agr Univ, Coll Resources & Environm, Wuhan 430070, Hubei, Peoples R China
推荐引用方式 GB/T 7714	Ni, L. S.,Fang, N. F.,Shi, Z. H.,et al. VALIDATING A BASIC ASSUMPTION OF USING CESIUM-137 METHOD TO ASSESS SOIL LOSS IN A SMALL AGRICULTURAL CATCHMENT[J]. LAND DEGRADATION & DEVELOPMENT,2017,28(5):1772-1778.
APA	Ni, L. S.,Fang, N. F.,Shi, Z. H.,Chen, F. X.,Wang, L.,&Fang, NF .(2017).VALIDATING A BASIC ASSUMPTION OF USING CESIUM-137 METHOD TO ASSESS SOIL LOSS IN A SMALL AGRICULTURAL CATCHMENT.LAND DEGRADATION & DEVELOPMENT,28(5),1772-1778.
MLA	Ni, L. S.,et al."VALIDATING A BASIC ASSUMPTION OF USING CESIUM-137 METHOD TO ASSESS SOIL LOSS IN A SMALL AGRICULTURAL CATCHMENT".LAND DEGRADATION & DEVELOPMENT 28.5(2017):1772-1778.