测绘通报 ›› 2026, Vol. 0 ›› Issue (3): 26-31.doi: 10.13474/j.cnki.11-2246.2026.0305

• 学术研究 • 上一篇    下一篇

基于微波遥感的雪深时空分布变化及影响因素研究——以雅鲁藏布江流域为例

白淑英, 朱杨贵, 谢涛, 张慧, 彭达   

  1. 南京信息工程大学遥感与测绘工程学院, 江苏 南京 210044
  • 收稿日期:2025-11-03 出版日期:2026-03-25 发布日期:2026-04-08
  • 作者简介:白淑英(1973—),女,博士,教授,从事遥感与GIS技术在生态环境、灾害评估中的应用研究。E-mail:001462@nuist.edu.cn
  • 基金资助:
    江苏省自然灾害综合风险普查评估与区划省级质检审核项目(SZZC-JC-2022081)

Spatio-temporal variation of snow depth and its influencing factors based on microwave remote sensing: a case study of the Brahmaputra River basin

BAI Shuying, ZHU Yanggui, XIE Tao, ZHANG Hui, PENG Da   

  1. College of Remote Sensing and Surveying Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China
  • Received:2025-11-03 Online:2026-03-25 Published:2026-04-08

摘要: 雅鲁藏布江流域雪冰融水占流域总径流量的比例超过30%,积雪时空分布的定量化研究对水电工程建设和运行有重要意义。本文利用积雪覆盖度数据对低分辨率雪深产品进行降尺度重建;基于降尺度产品分析2000—2019年雅鲁藏布江流域雪深的时空分布和变化特征,并进一步分析地形因素和气候因素对雪深的影响。结果表明:雅鲁藏布江流域的雪深在2000—2019年呈显著减少趋势,且空间异质性明显,深雪区对气候变化更为敏感;地形因素中高程和坡度对积雪分布影响显著,而坡向影响相对有限;雪深对降水变化的响应程度高于气温。本文结果为雅鲁藏布江流域水电系统优化运行及气候变化背景下的雪冰资源评估提供了科学依据。

关键词: 微波遥感, 雅鲁藏布江流域, 积雪深度, 降尺度

Abstract: Snow and ice meltwater account for more than 30% of the total runoff in the Brahmaputra River basin,making quantitative research on the spatio-temporal distribution of snow cover highly significant for the construction and operation of hydropower projects.This study employed a downscaling approach utilizing snow cover fraction data to reconstruct low-resolution snow depth products.Based on the downscaled data,the spatio-temporal distribution and variation characteristics of snow depth in the Brahmaputra River basin from 2000 to 2019 were analyzed,and the influences of topographic and climatic factors on snow depth were further examined.The results reveal a significant decreasing trend in snow depth across the basin during 2000—2019,with notable spatial heterogeneity.Deep-snow areas were more sensitive to climate change.Among topographic factors,elevation and slope significantly influenced snow distribution,while aspect had a relatively limited impact.Snow depth exhibited a stronger response to precipitation changes than to temperature variations.The findings of this study provide a scientific basis for optimizing the operation of hydropower systems and assessing snow and ice resources under climate change in the Brahmaputra River basin.

Key words: microwave remote sensing, Brahmaputra River basin, snow depth, downscaling

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