| 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
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| Corresponding Author | Su, Zhengan(suzhengan@imde.ac.cn) |
| 2019 | |
| Source Publication | EARTH SURFACE PROCESSES AND LANDFORMS
 |
| ISSN | 0197-9337 |
| Volume | 44Issue:1Pages:88-97 |
| Abstract | 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. |
| Keyword | soil erodibility critical shear stress rill erosion subsurface hydrological condition vertical zonality |
| DOI | 10.1002/esp.4482 |
| Indexed By | SCI |
| WOS Keyword | DIFFERENT LAND USES ; SOIL-EROSION ; AGGREGATE STABILITY ; SEDIMENT TRANSPORT ; TEMPORAL VARIATION ; DETACHMENT ; FLOW ; VARIABILITY ; RAINFALL ; RUNOFF |
| Language | 英语 |
| Funding Project | 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 Research Area | Physical Geography ; Geology |
| WOS Subject | Geography, Physical ; Geosciences, Multidisciplinary |
| WOS ID | WOS:000456214900008 |
| Funding Organization | 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 |
| Publisher | WILEY |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imde.ac.cn/handle/131551/24959 |
| Collection | 山地灾害与地表过程重点实验室 |
| Corresponding Author | Su, Zhengan |
| Affiliation | 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 |
| 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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| Variation in the ver（990KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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