气候变化领域集成服务门户(CCPortal): River incision and fracture density controls on the style and pattern of slope failure on the northeastern Tibetan Plateau

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DOI	10.1007/s11069-023-06330-1
	River incision and fracture density controls on the style and pattern of slope failure on the northeastern Tibetan Plateau
	Wang, Xueliang; Clague, John J.; Qi, Shengwen; Lan, Hengxing; Li, Lihui; Fang, Wenxin; Sun, Juanjuan; Wang, Junfei
发表日期	2023
ISSN	0921-030X
EISSN	1573-0840
英文摘要	Hillslopes are important elements of mountain landscapes, but there is still limited understanding of how hillslopes respond to river incision and rock mass properties at the landscape scale. Topographic characteristics at Qingyang Mountain (QYM) on the tectonically active northeastern Tibetan Plateau, which we documented using field observations and geometric measurements of high-resolution DEMs, are the result of differences in river incision over timescales of 100,000 years or more. Hillslope erosion at QYM is achieved by slope failures that increase hillslope angles as rivers incise. Based on the Culmann's method, we consider the slope relief of 221-231 m to be limiting values corresponding to the observed threshold slope angle of similar to 26.3 degrees in eastern QYM. Multi-scale analysis of lidar point clouds, obtained by laser scanner, and Structure from Motion photogrammetry reveal a spatial variation of bedrock fracture density that is consistent with lateral evolution of ridge-valley topography. Areas of higher fracture density correspond to eroded gullies, and areas of lower fracture density are found in ridges separating these gullies. Our results suggest that difference in tectonic fracturing of the rock mass dominantly drives lateral erosion of slopes in the study area.
关键词	River incision Fracture density Equilibrium slopes, Slope failure Rock mass strength Northeastern Tibet
英文关键词	THRESHOLD HILLSLOPES; TOPOGRAPHIC ANALYSIS; SHORT COMMUNICATION; FLUVIAL INCISION; TECTONIC CONTROL; EROSION RATES; GROWTH; SIZE
WOS研究方向	Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences ; Water Resources
WOS记录号	WOS:001113095600002
来源期刊	NATURAL HAZARDS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283637
作者单位	Chinese Academy of Sciences; Institute of Geology & Geophysics, CAS; Chinese Academy of Sciences; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Simon Fraser University; Chinese Academy of Sciences; Institute of Geographic Sciences & Natural Resources Research, CAS; Chang'an University
推荐引用方式 GB/T 7714	Wang, Xueliang,Clague, John J.,Qi, Shengwen,et al. River incision and fracture density controls on the style and pattern of slope failure on the northeastern Tibetan Plateau[J],2023.
APA	Wang, Xueliang.,Clague, John J..,Qi, Shengwen.,Lan, Hengxing.,Li, Lihui.,...&Wang, Junfei.(2023).River incision and fracture density controls on the style and pattern of slope failure on the northeastern Tibetan Plateau.NATURAL HAZARDS.
MLA	Wang, Xueliang,et al."River incision and fracture density controls on the style and pattern of slope failure on the northeastern Tibetan Plateau".NATURAL HAZARDS (2023).