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Variation in the vertical zonality of erodibility and critical shear stress of rill erosion in China's Hengduan Mountains

文献类型：期刊论文

作者Su, Zhengan1; Xiong, Donghong1; Zhang, Jianhui1; Zhou, Tao1; Yang, Hongkun1,2; Dong, Yifan1; Fang, Haidong3; Shi, Liangtao3
刊名EARTH SURFACE PROCESSES AND LANDFORMS
出版日期2019
卷号44期号:1页码:88-97
ISSN号0197-9337
关键词soil erodibility critical shear stress rill erosion subsurface hydrological condition vertical zonality
DOI10.1002/esp.4482
通讯作者Su, Zhengan(suzhengan@imde.ac.cn)
英文摘要Soil 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.
WOS关键词DIFFERENT LAND USES ; SOIL-EROSION ; AGGREGATE STABILITY ; SEDIMENT TRANSPORT ; TEMPORAL VARIATION ; DETACHMENT ; FLOW ; VARIABILITY ; RAINFALL ; RUNOFF
资助项目National 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研究方向Physical Geography ; Geology
语种英语
出版者WILEY
WOS记录号WOS:000456214900008
资助机构National 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
源URL[http://ir.imde.ac.cn/handle/131551/24958]  
专题成都山地灾害与环境研究所_山地灾害与地表过程重点实验室
通讯作者Su, Zhengan
作者单位1.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
推荐引用方式
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.

入库方式： OAI收割

来源：成都山地灾害与环境研究所

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