Morphometry of alluvial fans in an alpine valley basin in southeast Tibet: Spatial heterogeneity, controls, and implications
文献类型：期刊论文
| 作者 | Han, Pan1,2; Yu, Guo-An2 |
| 刊名 | CATENA
 |
| 出版日期 | 2025-03-01 |
| 卷号 | 250页码:108799 |
| 关键词 | Alluvial fan Morphometry Spatial heterogeneity Primary processes Parlung Tsangpo Basin |
| ISSN号 | 0341-8162 |
| DOI | 10.1016/j.catena.2025.108799 |
| 产权排序 | 1 |
| 文献子类 | Article |
| 英文摘要 | The morphometry of alluvial fans is a fundamental yet significant aspect of understanding fan dynamics and controls, offering potential benefits for fan type discrimination and mitigation of geo-hazards such as flash floods and debris flows. However, alluvial fans in alpine regions have received considerably less attention than their counterparts in non-alpine areas, despite their importance. Using Google Earth Pro, remote sensing images, targeted field surveys, and statistical analysis, we examine the morphometry, spatial heterogeneity along with underlying causes, and primary types (fluvial, debris-flow, and colluvial) of alluvial fans in the Parlung Tsangpo Basin (PTB), a large alpine tributary basin of the Yarlung Tsangpo River (upper Brahmaputra River) characterized by deep valleys in southeastern Tibet, China, based on a dataset of 129 fan samples. Our results reveal that: (1) Significant spatial heterogeneity exists in the morphometry of alluvial fans in the PTB, particularly regarding fan area. (2) Fans exhibiting distinct morphometries correspond to different primary processes (debris flow, fluvial, or colluvial dominated), with varying links to their source basins. (3) Discriminant analysis based on three variables (fan slope, source basin area, and Melton's R) can effectively distinguish between fan types and their primary processes. The development of alluvial fans in the PTB is collectively determined by various allogenic and autogenic factors, with primary processes and tributary-junction effects (distal confinement) acting as the main controls. The primary processes, influenced by regional relief (slope), climate (precipitation and temperature), and sediment supply conditions (volume and caliber), play an essential role in fan development, particularly regarding fan slope. In light of global climate change, new fans have been developing in the basin, while some previously stable fans have entered a new active phase. Consequently, debris flows have become a dominant primary process for alluvial fan development in PTB, driving the evolution of fan morphology. |
| URL标识 | 查看原文 |
| WOS关键词 | DEBRIS-FLOW PROCESSES ; SURFACE-MORPHOLOGY ; DEPOSITIONAL STYLE ; FLUVIAL MEGAFAN ; CLIMATIC-CHANGE ; EVOLUTION ; MOUNTAINS ; ALPS ; HAZARD ; LEVEL |
| WOS研究方向 | Geology ; Agriculture ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:001425568000001 |
| 出版者 | ELSEVIER |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/212293]  |
| 专题 | 陆地水循环及地表过程院重点实验室_外文论文 |
| 通讯作者 | Yu, Guo-An |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Key Lab Water Cycle & Related Land Surface Proc, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Han, Pan,Yu, Guo-An. Morphometry of alluvial fans in an alpine valley basin in southeast Tibet: Spatial heterogeneity, controls, and implications[J]. CATENA,2025,250:108799. |
| APA | Han, Pan,&Yu, Guo-An.(2025).Morphometry of alluvial fans in an alpine valley basin in southeast Tibet: Spatial heterogeneity, controls, and implications.CATENA,250,108799. |
| MLA | Han, Pan,et al."Morphometry of alluvial fans in an alpine valley basin in southeast Tibet: Spatial heterogeneity, controls, and implications".CATENA 250(2025):108799. |
入库方式： OAI收割
来源：地理科学与资源研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。