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Variation in the vertical zonality of erodibility and critical shear stress of rill erosion in China's Hengduan Mountains
Su, Zhengan1; Xiong, Donghong1; Zhang, Jianhui1; Zhou, Tao1; Yang, Hongkun1,2; Dong, Yifan1; Fang, Haidong3; Shi, Liangtao3
Corresponding AuthorSu, Zhengan(suzhengan@imde.ac.cn)
2019
Source PublicationEARTH SURFACE PROCESSES AND LANDFORMS
ISSN0197-9337
Volume44Issue:1Pages:88-97
AbstractSoil erodibility is an essential parameter used in soil erosion prediction. This study selected the Liangshan town watershed to quantify variation in the vertical zonality of rill erodibility (k(r)) in China's ecologically fragile Hengduan Mountains. Soil types comprised of yellow-brown (soil A), purple (soil B), and dry-red (soil C) in a descending order of occurrence from the summit to the valley, which roughly corresponds to the vertical climate zone (i.e. cool-high mountain, warm-low mountain, and dry-hot valley sections) of the study area. With elevation, vertical soil zonality varied in both soil organic matter (SOM) content and soil particle-size fractions. A series of rill erosion-based scour experiments were conducted, using water discharge rates of 100, 200, 300, 400, 500, and 600 mL min(-1). Additionally, detachment rates (Dr) were measured under three hydrological conditions (the drainage, saturation, and seepage treatments). Results show that both Dr and flow shear stress (&) values increased as discharge increased. As elevation increased, the k(r) values decreased, while the vertical zonality of critical shear stress (&(c)) values showed no obvious variation. The highest k(r) values were observed during the seepage treatment, followed by the saturation treatment then drainage treatment, indicating that variation in vertical hydraulic gradients could significantly alter k(r) values. This study also found that land-use types could also alter k(r) and &(c) values. Further research, however, is necessary to better quantify the effects of subsurface hydrological conditions and land-use types on k(r) under different soil zonalities in China's Hengduan Mountains. (c) 2018 John Wiley & Sons, Ltd.
Keywordsoil erodibility critical shear stress rill erosion subsurface hydrological condition vertical zonality
DOI10.1002/esp.4482
Indexed BySCI
WOS KeywordDIFFERENT LAND USES ; SOIL-EROSION ; AGGREGATE STABILITY ; SEDIMENT TRANSPORT ; TEMPORAL VARIATION ; DETACHMENT ; FLOW ; VARIABILITY ; RAINFALL ; RUNOFF
Language英语
Funding ProjectNational Basic Research Program (973 Program) of China[2015CB452704] ; National Key Research and Development Program of China[2017YFC0505102] ; Major Science and Technology Program for Water Pollution Control and Treatment[2017ZX07101-001]
WOS Research AreaPhysical Geography ; Geology
WOS SubjectGeography, Physical ; Geosciences, Multidisciplinary
WOS IDWOS:000456214900008
Funding OrganizationNational Basic Research Program (973 Program) of China ; National Key Research and Development Program of China ; Major Science and Technology Program for Water Pollution Control and Treatment
PublisherWILEY
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/24959
Collection中国科学院水利部成都山地灾害与环境研究所
Corresponding AuthorSu, Zhengan
Affiliation1.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Hazards & Earth Surface Proc, Chengdu 610041, Peoples R China
2.Southwest Petr Univ, Sch Geosci & Technol, Chengdu 610500, Sichuan, Peoples R China
3.Yunnan Acad Agr Sci, Inst Trop Ecoagr Sci, Yuanmou 651300, Peoples R China
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Corresponding Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
Su, Zhengan,Xiong, Donghong,Zhang, Jianhui,et al. Variation in the vertical zonality of erodibility and critical shear stress of rill erosion in China's Hengduan Mountains[J]. EARTH SURFACE PROCESSES AND LANDFORMS,2019,44(1):88-97.
APA Su, Zhengan.,Xiong, Donghong.,Zhang, Jianhui.,Zhou, Tao.,Yang, Hongkun.,...&Shi, Liangtao.(2019).Variation in the vertical zonality of erodibility and critical shear stress of rill erosion in China's Hengduan Mountains.EARTH SURFACE PROCESSES AND LANDFORMS,44(1),88-97.
MLA Su, Zhengan,et al."Variation in the vertical zonality of erodibility and critical shear stress of rill erosion in China's Hengduan Mountains".EARTH SURFACE PROCESSES AND LANDFORMS 44.1(2019):88-97.
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