Spatial patterns and influencing factors of debris flows in the middle Yarlung Zangbo River on the Tibetan Plateau

IF 4.2 2区工程技术 Q3 ENGINEERING, ENVIRONMENTAL Bulletin of Engineering Geology and the Environment Pub Date : 2025-03-10 DOI:10.1007/s10064-025-04203-4

Guisheng Hu, Xiangzhen Xia, Shufeng Tian, Zhiquan Yang

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Abstract

Currently, studies concerning geological disasters in the Yarlung Zangbo River Basin on the Tibetan Plateau predominantly focus on the Grand Bend downstream of the river. However, research about the spatial patterns and influencing factors of debris flow disasters in the middle reaches remains relatively unclear. Based on remote sensing interpretation, field investigation, and the frequency ratio method, the characteristics of debris flows in the middle Yarlung Zangbo River were analyzed, and the control effects of six factors, e.g. topography, geology, and rainfall on the development patterns of debris flow gully were studied. Research has uncovered the main findings below: 1) the 181 debris flows within the region can be classified into three types according to the water source conditions, each of which exhibits predominantly low-frequency, dilute, and giant-scale occurrences. 2) for the endogenic and exogenic dynamics, lithology has the strongest control effect on debris flows; in terms of topography and vegetation, NDVI (Normalized Differential Vegetation Index) has the strongest control effect on debris flows. 3) Finally, we identified the section from the Naidong District of Shannan City to Nang County of Linzhi City as the area susceptible to debris flow.

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青藏高原雅鲁藏布江中游泥石流空间格局及影响因素

目前，关于青藏高原雅鲁藏布江流域地质灾害的研究主要集中在雅鲁藏布江下游的大弯地区。但是，对中游地区泥石流灾害的空间格局和影响因素的研究还比较不清楚。基于遥感解译、野外调查和频率比法，分析了雅鲁藏布江中游泥石流特征，研究了地形、地质、降雨等6个因素对泥石流沟发育模式的控制作用。研究发现：1)区域内181条泥石流根据水源条件可分为三种类型，以低频率、稀度和超大规模为主。2)对内源动力和外源动力中，岩性对泥石流的控制作用最强；在地形和植被方面，NDVI（归一化植被指数）对泥石流的控制作用最强。3)最后确定山南市乃东区至林芝市南县段为泥石流易发区域。

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来源期刊

Bulletin of Engineering Geology and the Environment 工程技术-地球科学综合

CiteScore

7.10

自引率

11.90%

发文量

445

审稿时长

4.1 months

期刊介绍： Engineering geology is defined in the statutes of the IAEG as the science devoted to the investigation, study and solution of engineering and environmental problems which may arise as the result of the interaction between geology and the works or activities of man, as well as of the prediction of and development of measures for the prevention or remediation of geological hazards. Engineering geology embraces: • the applications/implications of the geomorphology, structural geology, and hydrogeological conditions of geological formations; • the characterisation of the mineralogical, physico-geomechanical, chemical and hydraulic properties of all earth materials involved in construction, resource recovery and environmental change; • the assessment of the mechanical and hydrological behaviour of soil and rock masses; • the prediction of changes to the above properties with time; • the determination of the parameters to be considered in the stability analysis of engineering works and earth masses.