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冰川冻土 ›› 2019, Vol. 41 ›› Issue (5): 1026-1035.doi: 10.7522/j.issn.1000-0240.2019.0533

• 冰川与冰冻圈水文 • 上一篇    下一篇

石羊河流域冰川变化与地形因子的关系探究

李林凤1,3,4, 李开明1,2   

  1. 1. 兰州交通大学 测绘与地理信息学院, 甘肃 兰州 730070;
    2. 兰州城市学院 地理与环境工程学院, 甘肃 兰州 730070;
    3. 地理国情监测技术应用国家地方联合工程研究中心, 甘肃 兰州 730070;
    4. 甘肃省地理国情监测工程实验室, 甘肃 兰州 730070
  • 收稿日期:2019-07-08 修回日期:2019-09-07 发布日期:2020-02-24
  • 通讯作者: 李开明,E-mail:lkm_wd@126.com. E-mail:lkm_wd@126.com
  • 作者简介:李林凤(1992-),女,陕西西安人,2016年在西北师范大学获学士学位,现为兰州交通大学在读硕士研究生,从事冰冻圈遥感监测研究.E-mail:li_linf@126.com
  • 基金资助:
    国家自然科学基金项目(41661014);甘肃省自然科学基金项目(18JR3RA221);兰州交通大学优秀平台(201806)资助

Study on the relationship between glacier change and topographic factors in the Shiyang River basin

LI Linfeng1,3,4, LI Kaiming1,2   

  1. 1. Faculty of Geomatics, Lanzhou Jiaotong University, Lanzhou 730070, China;
    2. College of Geography and Environmental Engineering, Lanzhou City University, Lanzhou 730070, China;
    3. National-Local Joint Engineering Research Center of Technology and Applications for National Geographic State Monitoring, Lanzhou 730070, China;
    4. Gansu Provincial Engineering Laboratory for National Geographic State Monitoring, Lanzhou 730070, China
  • Received:2019-07-08 Revised:2019-09-07 Published:2020-02-24

摘要: 以甘肃省石羊河流域为研究区,运用GIS和RS技术结合人工目视解译,提取了1995年、2002年、2009年、2015年、2016年5期遥感影像冰川边界信息。结合DEM数据提取了坡度、朝向、海拔三个地形因子。基于相关性分析与地理探测器的方法,对冰川变化与地形因子进行了相关分析,并研究了冰川变化与地形因子之间的空间关系。结果表明:(1)该地区冰川年均面积变化率由1973-1995年的-1.27%·a-1变为2015-2016年的-2.87%·a-1,消融速度加快,面积小于0.1 km2的小冰川消融显著;(2)石羊河流域冰川分布主要的朝向是N、NE、NW,朝向与冰川变化具有一定相关性,南坡退缩较快;(3)坡度与冰川变化呈异向相关,海拔高度控制着冰川的消融速度,低海拔冰川的退缩幅度更大;(4)地形因子对冰川变化空间分异的影响显著不同,海拔是冰川变化空间分异最重要的控制因素,其次是朝向,最后是坡度。

关键词: 石羊河流域, 冰川变化, 地形因子, 相关分析, 地理探测器

Abstract: Taking the Shiyang River basin of Gansu Province as the research area, using GIS and RS technologies combined with manual visual interpretation, the glacier boundary remote sensing images were extracted of 1995, 2002, 2009, 2015 and 2016. Three terrain factors, i.e., slope, orientation and elevation, are extracted, in combine with DEM data. Based on correlation analysis and GeoDetector, the correlation between glacier change and topographic factor was analyzed, and the spatial relationship between glacier change and topographic factors was studied. The results show that:(1) the annual average area change rate of glaciers in the region had changed from -1.27%·a-1 in 1973-1995 to -2.87%·a-1 in 2015-2016; the ablation rate had accelerated, and the small glaciers with an area less than 0.1 km2 had retreated significantly; (2) the main orientations of glacial distribution in the Basin were N, NE and NW, which had a certain correlation with the change of the glaciers; but those on the south slopes had retreated faster; (3) the slope had related to the change of glacier, so did the altitude, which had controlled the ablation rate of glaciers; the lower the altitude, the fast the glacier retreating; (4) the influence of topographic factors on spatial differentiation of glacial changes was significantly different; altitude was the most control factor for spatial differentiation of glacial changes, followed by orientation and then by slope.

Key words: Shiyang River basin, glacial change, topographic factor, correlation analysis, geographic detector

中图分类号: 

  • P343.6