气候变化领域集成服务门户(CCPortal): Experimental study on the effects of multiple factors on spring meltwater erosion on an alpine meadow slope

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DOI	10.1016/j.iswcr.2020.02.001
	Experimental study on the effects of multiple factors on spring meltwater erosion on an alpine meadow slope
	Shi, Xiaonan; Zhang, Fan; Wang, Li; Jagirani, Muhammad Dodo; Zeng, Chen; Xiao, Xiong; Wang, Guanxing
通讯作者	Shi, XN (通讯作者)
发表日期	2020
ISSN	2095-6339
EISSN	2589-059X
起始页码	116
结束页码	123
卷号	8 期号:2
英文摘要	Meadow degradation provides a major indication of increased soil erosion in alpine regions. Serious soil erosion is observed during the spring in particular because soil thawing coincides with the period of snowmelt and the meadow coverage is very low at this time. Studies relating to soil erosion caused by spring meltwater are, however, limited and controversial. Therefore, a field experimental study was conducted in a typical meadow in the Binggou watershed on the northern edge of the Tibetan Plateau to assess the impact of multiple factors on spring meltwater erosion on an alpine meadow slope. The multiple factors included three flow rates (1, 2, and 3 L/min), four slope gradients (10 degrees, 15 degrees, 20 degrees, and 25 degrees), and three underlying surface conditions (meadow, disturbed meadow, and alluvial soil). An equal volume of concentrated meltwater flow was used in all experiments. The results showed that rapid melting at a high flow rate could accelerate soil erosion; as the flow rate increased from 1 to 3 L/min, the total surface runoff increased by a factor of 0.7 and the total sediment yield increased by more than 6-fold. The influence of the slope gradient on the amount of runoff was positively linear and the influence was relatively low; when the slope increased from 10 degrees to 25 degrees, the total runoff only increased by 16%. However, the slope gradient had a strong impact on soil erosion. The total sediment yield doubled when the slope increased from 10 degrees to 20 degrees and then slightly decreased at 25 degrees. The meadow could effectively reduce soil erosion, although when the meadow was disturbed, the total runoff increased by 60% and the sediment yield by a factor of 1.5. The total runoff from the alluvial soil doubled in comparison to the meadow, while the sediment yield increased nearly 7-fold. The findings of this study could be helpful to understand the characteristics and impact of multiple controlling factors of spring meltwater erosion. It also aims to provide a scientific basis for an improved management of alpine meadows as well as water and soil conservation activities in high-altitude cold regions. (c) 2020 International Research and Training Center on Erosion and Sedimentation and China Water and Power Press. Production and Hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
关键词	SOIL-EROSION RUNOFF WINTER
英文关键词	Meltwater erosion; Alpine meadow; Slope erosion; Impact factors
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Agriculture ; Water Resources
WOS类目	Environmental Sciences ; Soil Science ; Water Resources
WOS记录号	WOS:000540327800002
来源期刊	INTERNATIONAL SOIL AND WATER CONSERVATION RESEARCH
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259775
推荐引用方式 GB/T 7714	Shi, Xiaonan,Zhang, Fan,Wang, Li,et al. Experimental study on the effects of multiple factors on spring meltwater erosion on an alpine meadow slope[J]. 中国科学院青藏高原研究所,2020,8(2).
APA	Shi, Xiaonan.,Zhang, Fan.,Wang, Li.,Jagirani, Muhammad Dodo.,Zeng, Chen.,...&Wang, Guanxing.(2020).Experimental study on the effects of multiple factors on spring meltwater erosion on an alpine meadow slope.INTERNATIONAL SOIL AND WATER CONSERVATION RESEARCH,8(2).
MLA	Shi, Xiaonan,et al."Experimental study on the effects of multiple factors on spring meltwater erosion on an alpine meadow slope".INTERNATIONAL SOIL AND WATER CONSERVATION RESEARCH 8.2(2020).