Soil erodibility indicators as affected by water level fluctuations in the Three Gorges Reservoir area, China

doi:10.1016/j.catena.2021.105692

	Soil erodibility indicators as affected by water level fluctuations in the Three Gorges Reservoir area, China
	Chen, Shiqi 1,2; Zhang, Guanghui 1,2; Luo, Yifeng 3; Zhou, Hao 3; Wang, Kewen 4; Wang, Chengshu 1,2
刊名	CATENA
	2021-12-01
卷号	207 页码:12
关键词	Soil erosion Near soil surface characteristics Soil physical properties Inundated duration Wet-dry cycles
ISSN号	0341-8162
DOI	10.1016/j.catena.2021.105692
通讯作者	Zhang, Guanghui(ghzhang@bnu.edu.cn)
英文摘要	The near soil surface characteristics of plant communities probably change considerably with seasonal water-level fluctuations, thus induced corresponding variations in soil erodibility indicators. This study was conducted to investigate the variations in soil erodibility indicators triggered by varying inundation intensity or temporal water-level fluctuations in the Three Gorges Reservoir area. Two non-inundation sites (as the control) and six sites with different water-level fluctuation intensities were selected to measure or calculate eight soil erodibility indicators and then to determine a comprehensive soil erodibility index (CSEI). The erodibility indicators included K factor, slaking rate (SR), mean weighted diameter of aggregates (MWD), mean number of waterdrop impacts (MND), structural stability index (SSI), saturated conductivity (K-s), cohesion (Coh), and penetration resistance (PR). The variation in each soil erodibility indicator could be explained by the changes in near soil surface characteristics of plant community. The results indicated that the MWD, MND, SR, Coh, SSI, and K-s decreased gradually with the intensity of water level fluctuations (IWLFs), while the reverse was found for PR. K factor firstly increased and then decreased with the IWLFs. The CSEI increased with IWLFs, which was closely related to elevation. Compared with the control, CSEI increased by 123.3%, 132.9%, 93.9%, 84.8%, 48.7%, and 55.2% for water levels of 150, 155, 160, 165, 170 and 175 m, respectively. The changes in near soil surface characteristics of the plant community directly led to differences in soil erodibility indicators. Significant positive correlations were detected between soil erodibility indices, and bulk density and sand content, while significant negative correlations were found between root mass density, silt, clay, and organic matter contents. CSEI increased linearly with inundation time and duration. The results are helpful for understanding the mechanism of seasonal fluctuations in soil erodibility for land frequently inundated by water.
资助项目	National Key Research and Development Program of China[2017YFC0504702] ; Key Research and Development Project of Social Livelihood in Chongqing[cstc2018jscx-mszdX0061]
WOS关键词	LOESS PLATEAU ; AGGREGATE STABILITY ; TEMPORAL VARIATION ; ORGANIC-CARBON ; OVERLAND-FLOW ; RIPARIAN ZONE ; VEGETATION RESTORATION ; HYDRAULIC CONDUCTIVITY ; INTERRILL ERODIBILITY ; DETACHMENT CAPACITY
WOS研究方向	Geology ; Agriculture ; Water Resources
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000703268900107
资助机构	National Key Research and Development Program of China ; Key Research and Development Project of Social Livelihood in Chongqing
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/166100]
专题	中国科学院地理科学与资源研究所
通讯作者	Zhang, Guanghui
作者单位	1.Beijing Normal Univ, State Key Lab Earth Surface Proc & Resources Ecol, Beijing 100875, Peoples R China 2.Beijing Normal Univ, Fac Geog Sci, Beijing 100875, Peoples R China 3.Southwest Univ, Coll Resources & Environm, Key Lab Ecoenvironm Three Gorges Reg, Minist Educ, Chongqing 400716, Peoples R China 4.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Chen, Shiqi,Zhang, Guanghui,Luo, Yifeng,et al. Soil erodibility indicators as affected by water level fluctuations in the Three Gorges Reservoir area, China[J]. CATENA,2021,207:12.
APA	Chen, Shiqi,Zhang, Guanghui,Luo, Yifeng,Zhou, Hao,Wang, Kewen,&Wang, Chengshu.(2021).Soil erodibility indicators as affected by water level fluctuations in the Three Gorges Reservoir area, China.CATENA,207,12.
MLA	Chen, Shiqi,et al."Soil erodibility indicators as affected by water level fluctuations in the Three Gorges Reservoir area, China".CATENA 207(2021):12.