Analysis of snow cover changes along the Xinjiang-Xizang Railway(Xizang section)based on Landsat data
Liu Zhengxin
Zhao Xinyong
Gao Fengxin
Li Qin
Danzeng Zongzhu
Guo Duoduo
Chai Haosen
Abstract：This study utilizes Landsat satellite data and DEM data to analyze the snow cover and climate change along the Garl-Pulan-Zhongba-Gyirong line(Xizang section)of the Xinjiang-Xizang Railway from 2020 to 2023 through GIS.The results can provide a certain degree of reference for railway route selection,and can also be used to conduct a comprehensive analysis of the ice and snow disasters along the line section based on this study.The find-ings indicate that(1)the stable snow cover throughout the snow season is mainly distributed on mountain ridges at an altitude of 4200～5500 m,and there is more snow in the Kunsa Township of Garl County and the Ma Youmu Moun-tain area of Pulan County in the Ali region and the snow cover in the study area is mainly seasonal,greatly affected by climatic factors;(2)the spatiotemporal distribution of snow in southwestern Tibet is extremely uneven,and the dis-tribution of snow season varies greatly in the same month of the year,with a difference of more than 20％and an ex-treme month of more than 50％;(3)he average winter temperature in the study area ranges from-35.5 to 6.9℃,and the average wind speed ranges from 0 to 5.77 m/s in different months,which reaches the starting wind speed of snow particles and is conducive to the formation and development of windblown snow,and the impact of ice and snow di-sasters on engineering construction should be paid atttention during route selection.
Keywords：Snow remote sensingSnow cover analysisIce and snow disastersLandsatXizang
Publication Date：2024-09-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：9( 50-58 )