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

文献类型：期刊论文

作者Shi, Z. H.1,3; Ni, L. S.2,3; Fang, N. F.2,3; Chen, F. X.4; Wang, L.2,3; 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.
刊名LAND DEGRADATION & DEVELOPMENT
出版日期2017
卷号28期号:5页码:1772-1778
ISSN号1085-3278
关键词Cesium-137 Method Soil Erosion Catchment Fingerprinting Method Check Dam
DOI10.1002/ldr.2708
文献子类Article
英文摘要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.
学科主题Environmental Sciences & Ecology ; Agriculture
URL标识查看原文
出版地HOBOKEN
语种英语
出版者WILEY
WOS记录号WOS:000407990500026
资助机构National Natural Science Foundation of China [41525003, 41671282] ; National Natural Science Foundation of China [41525003, 41671282] ; National Natural Science Foundation of China [41525003, 41671282] ; National Natural Science Foundation of China [41525003, 41671282]
源URL[http://ir.iswc.ac.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.Minist Water Resources, Yangling 712100, Peoples R China
2.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, 26th Xinong Rd, Yangling 712100, Peoples R China
3.Chinese Acad Sci, Inst Soil & Water Conservat, 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		 Shi, Z. H.,Ni, L. S.,Fang, N. F.,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 Shi, Z. H.,Ni, L. S.,Fang, N. F.,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 Shi, Z. H.,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.

入库方式： OAI收割

来源：水土保持研究所

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