测绘通报 ›› 2025, Vol. 0 ›› Issue (5): 55-58,73.doi: 10.13474/j.cnki.11-2246.2025.0509

• 生态全要素监测与分析 • 上一篇    

联合Sentinel-1数据与POT技术的普若岗日冰川流速场测绘

杨宇浩1, 蔡嘉伦1,2, 张波3, 张文君1,2, 王卫红1,2, 刘先文1,2   

  1. 1. 西南科技大学环境与资源学院, 四川 绵阳 621010;
    2. 国家遥感中心绵阳科技城分部, 四川 绵阳 621010;
    3. 中国科学院、水利部成都山地灾害与环境研究所, 四川 成都 610041
  • 收稿日期:2024-09-23 发布日期:2025-06-05
  • 通讯作者: 蔡嘉伦。E-mail:rscai@swust.edu.cn
  • 作者简介:杨宇浩(2001—),男,硕士生,研究方向为冰川地质遥感监测应用。E-mail:rs_yhyang@163.com
  • 基金资助:
    西南科技大学博士基金(22ZX7171;22ZX7170;21ZX7106);国家自然科学基金(U22A20565;42171355);西藏自治区科技计划(XZ202301YD0002C-03);国家重点研发计划(2023YFC3008300);教育部产学合作协同育人项目(231104718062123)

Mapping of the flow velocity field of the Purog Kangri Glacier using Sentinel-1 data and POT technology

YANG Yuhao1, CAI Jialun1,2, ZHANG Bo3, ZHANG Wenjun1,2, WANG Weihong1,2, LIU Xianwen1,2   

  1. 1. School of Environment and Resource, Southwest University of Science and Technology, Mianyang 621010, China;
    2. Mianyang S&T City Division, National Remote Sensing Center of China, Mianyang 621010, China;
    3. Institute of Mountain Hazards and Environment, Chinese Academy of Sciences & Ministry of Water Resources, Chengdu 610041, China
  • Received:2024-09-23 Published:2025-06-05

摘要: 本文基于两幅Sentinel-1雷达卫星影像,利用像素偏移追踪技术提取出普若岗日冰川及4条典型冰川的表面流速信息并绘制冰川流速场,以研究普若岗日冰川在2023年9—10月的表面流速和流速分布特征。利用像素偏移追踪技术对两幅SAR影像进行精确配准,得到同名像元在水平方向的像素偏移量,从而获取冰川表面流速。基于冰川流速场对普若岗日冰川表面流速和流速分布特征进行分析,结果表明,普若岗日冰川的表面流速整体上较缓慢,平均流速约为0.05 m/d,普若岗日西北部、东北部、中部和西南部4条典型冰川主要流动区域的平均流速分别约为0.20、0.19、0.15和0.04 m/d。研究发现,普若岗日冰川空间位置分布不同的区域,其流速特征也有所不同,主要表现为普若岗日东北部典型冰川比西南部典型冰川的流速更快。

关键词: 冰川表面流速, Sentinel-1, 像素偏移追踪技术, 普若岗日冰川

Abstract: Study the surface velocity and velocity distribution characteristics of the Purog Kangri Glacier from September to October in 2023. Based on two Sentinel-1 radar satellite images, the pixel offset tracking technique is used to extract surface velocity information of Purog Kangri Glacier Glacier and four typical glaciers and draw a glacier velocity field. The pixel offset tracking technique obtains the horizontal pixel offset of the corresponding pixels in the two SAR images by accurately registering the two images, thereby obtaining glacier surface velocity. The surface velocity and velocity distribution characteristics of Purog Kangri Glacier are analyzed based on the glacier velocity field. The results show that the surface velocity of Purog Kangri Glacier is generally slow, with an average velocity of about 0.05 m/d. The average flow velocity of the four typical glaciers in the northwest, northeast, central and southwest of Purog Kangri Glacier is about 0.20, 0.19, 0.15 and 0.04 m/d, respectively. The study found that the flow velocity characteristics of glaciers with different spatial distribution in Purog Kangri Glacier are also different, mainly manifested as the northeastern typical glacier have a faster flow velocity than the southwestern typical glacier.

Key words: glacier surface velocity, Sentinel-1, pixel offset tracking technology, Purog Kangri Glacier

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