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Quantifying the surface covering, binding and bonding effects of biological soil crusts on soil detachment by overland flow
Liu, Fa1,2; Zhang, Guang-Hui2,3; Sun, Fubao1; Wang, Hao2,3; Sun, Long4
2017-12-01
Source PublicationEARTH SURFACE PROCESSES AND LANDFORMS
ISSN0197-9337
Volume42Issue:15Pages:2640-2648
Corresponding AuthorZhang, Guang-Hui(ghzhang@bnu.edu.cn)
AbstractBiological soil crusts (BSCs) have impacts on soil detachment process through surface covering, and binding and bonding (B&B) mechanisms, which might vary with successional stages of BSCs. This study was conducted to quantify the effects of surface covering, binding and bonding of BSCs on soil detachment capacity by overland flow in a 4m long hydraulic flume with fixed bed. Two dominant BSC types, developed well in the Loess Plateau (the early successional cyanobacteria and the later successional moss), were tested using natural undisturbed soil samples collected from the abandoned farmlands. Two treatments of undisturbed crusts and one treatment of removing the above-ground tissue of BSCs were designed for each BSC type. For comparison, bare loess soil was used as the baseline. The collected soil samples were subjected to flow scouring under six different shear stresses, ranging from 6.7 to 21.2Pa. The results showed that soil detachment capacity (D-c) and rill erodibility (K-r) decrease with BSC succession, and the presence of BSCs obviously increased the critical shear stress, especially for the later successional moss crust. For the early successional cyanobacteria crust, D-c was reduced by 69.2% compared to the bare loess soil, where 37.7% and 31.5% are attributed to the surface covering and B&B, respectively. For the later successional moss crust, D-c decreased by 89.8% compared to the bare loess soil, where 68.9% and 20.9% contributed to the surface covering and B&B, respectively. These results are helpful in understanding the influencing mechanism of BSCs on soil erosion and in developing the process-based erosion models for grassland and forestland. Copyright (c) 2017 John Wiley & Sons, Ltd.
Keywordbiological soil crusts binding and bonding effects contribution rate rill erodibility loess plateau
DOI10.1002/esp.4213
WOS KeywordHILLY LOESS PLATEAU ; CONCENTRATED FLOW ; SHALLOW FLOW ; EROSION ; CHINA ; RUNOFF ; ERODIBILITY ; ECOSYSTEMS ; GRASSLANDS ; RESISTANCE
Indexed BySCI
Language英语
Funding ProjectNational key R&D Program of China[2017YFC0504702] ; State Key Program of National Natural Science Foundation of China[41530858] ; Fund for Creative Research Groups of the National Natural Science Foundation of China[41621061]
Funding OrganizationNational key R&D Program of China ; State Key Program of National Natural Science Foundation of China ; Fund for Creative Research Groups of the National Natural Science Foundation of China
WOS Research AreaPhysical Geography ; Geology
WOS SubjectGeography, Physical ; Geosciences, Multidisciplinary
WOS IDWOS:000417266000010
PublisherWILEY
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/56803
Collection中国科学院地理科学与资源研究所
Corresponding AuthorZhang, Guang-Hui
Affiliation1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
2.Beijing Normal Univ, Fac Geog Sci, Beijing 100875, Peoples R China
3.Beijing Normal Univ, State Key Lab Earth Surface Proc & Resource Ecol, Beijing 100875, Peoples R China
4.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China
Recommended Citation
GB/T 7714
Liu, Fa,Zhang, Guang-Hui,Sun, Fubao,et al. Quantifying the surface covering, binding and bonding effects of biological soil crusts on soil detachment by overland flow[J]. EARTH SURFACE PROCESSES AND LANDFORMS,2017,42(15):2640-2648.
APA Liu, Fa,Zhang, Guang-Hui,Sun, Fubao,Wang, Hao,&Sun, Long.(2017).Quantifying the surface covering, binding and bonding effects of biological soil crusts on soil detachment by overland flow.EARTH SURFACE PROCESSES AND LANDFORMS,42(15),2640-2648.
MLA Liu, Fa,et al."Quantifying the surface covering, binding and bonding effects of biological soil crusts on soil detachment by overland flow".EARTH SURFACE PROCESSES AND LANDFORMS 42.15(2017):2640-2648.
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