干旱区生态环境知识资源中心(Arid): Controls on the regional distribution of landslide dams and implications for fluvial landform evolution in Bhutan and its surrounding area

Arid

DOI	10.1007/s11629-023-8041-6
	Controls on the regional distribution of landslide dams and implications for fluvial landform evolution in Bhutan and its surrounding area
	Zhang, Qi-yuan; Hu, Kai-heng; Liu, Shuang; Liu, Wei-ming
通讯作者	Hu, KH
来源期刊	JOURNAL OF MOUNTAIN SCIENCE
ISSN	1672-6316
EISSN	1993-0321
出版年	2023
卷号	20 期号:8 页码:2107-2132
英文摘要	The regional distribution of landslide dams can provide valuable insights into the interactions among various factors, including lithology, topography, climate, and fluvial landforms in tectonically active mountains. Himalayan rivers are frequently impacted by large-scale landslide damming, which profoundly influence fluvial geomorphology. In this study, we identified 1652 landslide dams in four major rivers of Bhutan and its surrounding area by remote sensing interpretation. Notably, approximately 71% of these landslide dams are found in regions composed of quartzite or gneiss. Fault-related tectonic activity plays a significant role in governing the distribution of these landslide dams, as approximately 83% of the mapped landslide dams are found within a 10 km radius of the nearest fault. The majority of the identified landslide dams are situated in areas with relatively modest local relief, ranging from 227 m to 327 m. These dams tend to cluster in the tributaries, and the stream power of almost 95% of them is typically below 1x10(6) kg m(2) s(-3). Our data, combining the erosion rate and kernel density map of the landslide dams, reveals that regions with high erosion rates do not consistently align with the major high-density distribution of landslide dams. It is shown that the distribution of landslide dams is strongly influenced by the valley form. In comparison to U-shaped valleys, V-shaped valleys exhibit a higher density of landslide dams. Intriguingly, we also find a positive correlation between the landslide-dam distribution density and the erosion rate only in relatively arid regions with mean annual rainfall less than 500 mm. Moreover, the length of the upstream reach protected by the knickpoint associated with both lithology and landslide damming is about three times longer than that protected by the knickpoint associated only with landslide damming.
英文关键词	Bhutan Himalayas Landslide dams Erosion rate Geomorphological impacts Landscape evolution
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001048842800001
WOS关键词	RIVER INCISION ; ROCK-UPLIFT ; THRESHOLD HILLSLOPES ; TOPOGRAPHIC ANALYSIS ; SHORT COMMUNICATION ; MOUNTAIN-RANGES ; SOUTHERN TIBET ; EROSION RATES ; SLOPE FAILURE ; NEW-ZEALAND
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/397489
推荐引用方式 GB/T 7714	Zhang, Qi-yuan,Hu, Kai-heng,Liu, Shuang,et al. Controls on the regional distribution of landslide dams and implications for fluvial landform evolution in Bhutan and its surrounding area[J],2023,20(8):2107-2132.
APA	Zhang, Qi-yuan,Hu, Kai-heng,Liu, Shuang,&Liu, Wei-ming.(2023).Controls on the regional distribution of landslide dams and implications for fluvial landform evolution in Bhutan and its surrounding area.JOURNAL OF MOUNTAIN SCIENCE,20(8),2107-2132.
MLA	Zhang, Qi-yuan,et al."Controls on the regional distribution of landslide dams and implications for fluvial landform evolution in Bhutan and its surrounding area".JOURNAL OF MOUNTAIN SCIENCE 20.8(2023):2107-2132.