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Soil detachment capacity by rill flow for five typical loess soils on the Loess Plateau of China

文献类型：期刊论文

作者Shen, Nan4,5; Wang, Zhanli4,5; Guo, Qi5,6; Zhang, Qingwei7; Wu, Bing8; Liu, June2; Ma, Chunyan3; Delang, Claudio O.1; Zhang, Fengbao4,5
刊名SOIL & TILLAGE RESEARCH
出版日期2021-09-01
卷号213页码:12
ISSN号0167-1987
关键词The loess plateau Rill erosion Soil detachment capacity Effective soil particle size Soil cohesion Stream power
DOI10.1016/j.still.2021.105159
通讯作者Wang, Zhanli(zwang@nwsuaf.edu.cn) ; Zhang, Fengbao(fbzhang@nwsuaf.edu.cn)
英文摘要The loess region of China is one of the most heavily eroded areas in the world. Soil detachment capacity by rill flow (D-c) is a key parameter for quantifying intensity of rill erosion in many process-based erosion models. However, only a limited number of studies have been devoted to soil detachment capacity for the various types of loess soil such as is found on the Loess Plateau, where there is variation from south to north and in terms of soil particle size composition. The objectives of this study were (1) to discriminate differences in soil detachment capacity by rill flow (D-c) among five loess soils, (2) to investigate the relationship between D-c and hydrodynamic parameters, and the relationship between D-c and soil properties, and (3) to establish an equation to model soil detachment capacity by rill flow for the loess region. Soil detachment capacity by rill flow for five typical loess soils found on the Loess Plateau of China was investigated through a flume experiment by varying five flow discharges and five slope gradients. The results show that D-c of SM sandy loess is the largest with a mean of 2.2145 kg m(-2) s(-1), followed by YL clay loess, DB sandy loess, AS loess, and CW loess. Stream power is the best hydrodynamic parameter to describe the dynamic process of soil detachment capacity by rill flow for these five loess soils. Soil detachment capacity by rill flow was negatively correlated with soil cohesion and effective silt content (P < 0.05), while it was positively correlated with effective median soil particle size (P < 0.01) and effective sand content (P < 0.05). Soil detachment capacity by rill flow for various hydraulic and soil conditions in the loess region could be modeled using a quaternary power function of slope gradient, flow discharge, soil cohesion and effective median particle size (NSE = 0.96), or it could be modeled by a ternary power function which calculates the variation of soil detachment capacity with stream power, soil cohesion and effective median size (NSE = 0.96). The results of this study reveal the mechanism of soil detachment by rill flow and advance development of a physically-based rill erosion model. Future research should focus on the impact of effective particle size on D-c to ensure a full understanding of soil erosion processes.
WOS关键词CONCENTRATED FLOW ; OVERLAND-FLOW ; EROSION MODEL ; SEDIMENT TRANSPORT ; SHALLOW FLOW ; SHEAR-STRESS ; ERODIBILITY ; RESISTANCE ; SLOPES ; ROOTS
资助项目National Natural Science Foundation of China[41907054] ; National Natural Science Foundation of China[41830758] ; National Natural Science Foundation of China[41867015] ; National Key Research and Development Program of China[2017YFD0800502] ; Chinese Universities Scien-tific Fund[2452020205] ; State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau[A314021402-2001]
WOS研究方向Agriculture
语种英语
出版者ELSEVIER
WOS记录号WOS:000687299900005
资助机构National Natural Science Foundation of China ; National Key Research and Development Program of China ; Chinese Universities Scien-tific Fund ; State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau
源URL[http://ir.igsnrr.ac.cn/handle/311030/165126]  
专题中国科学院地理科学与资源研究所
通讯作者Wang, Zhanli; Zhang, Fengbao
作者单位1.Hong Kong Baptist Univ, Dept Geog, Kowloon Tong, Hong Kong 999077, Peoples R China
2.Shaanxi Normal Univ, Sch Geog & Tourism, Xian 710119, Shaanxi, Peoples R China
3.Yulin Univ, Coll Life Sci, Yuling 719000, Shaanxi, Peoples R China
4.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China
5.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China
6.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
7.Northwest A&F Univ, Sch Resources & Environm, Yangling 712100, Shaanxi, Peoples R China
8.Xi An Jiao Tong Univ, Sch Human Settlements & Civil Engn, Dept Civil Engn, Xian 710049, Shaanxi, Peoples R China
推荐引用方式
GB/T 7714		 Shen, Nan,Wang, Zhanli,Guo, Qi,et al. Soil detachment capacity by rill flow for five typical loess soils on the Loess Plateau of China[J]. SOIL & TILLAGE RESEARCH,2021,213:12.
APA Shen, Nan.,Wang, Zhanli.,Guo, Qi.,Zhang, Qingwei.,Wu, Bing.,...&Zhang, Fengbao.(2021).Soil detachment capacity by rill flow for five typical loess soils on the Loess Plateau of China.SOIL & TILLAGE RESEARCH,213,12.
MLA Shen, Nan,et al."Soil detachment capacity by rill flow for five typical loess soils on the Loess Plateau of China".SOIL & TILLAGE RESEARCH 213(2021):12.

入库方式： OAI收割

来源：地理科学与资源研究所

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