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林业资源管理 ›› 2019›› Issue (4): 124-131.doi: 10.13466/j.cnki.lyzygl.2019.04.018

• 技术应用 • 上一篇    下一篇

Google Earth Engine在四川省多年植被覆盖度动态监测中的应用

冯李(), 胡文英, 李应鑫, 张恩伟   

  1. 云南师范大学,昆明 650500
  • 收稿日期:2019-06-12 修回日期:2019-07-05 出版日期:2019-08-28 发布日期:2020-10-20
  • 作者简介:冯李(1996-),女,四川巴中人,在读硕士,主要从事资源环境遥感研究。Email: 1352582489@qq.com
  • 基金资助:
    国家自然基金(41561048);云南省中青年学术技术带头人培养项目(2008PY056);云南省高校科技创新团队支持计划;云南师范大学研究生科研创新基金项目(yjs2018112)

Dynamic Monitoring of Multi-year Vegetation Coverage in Sichuan Province Based on Google Earth Engines

FENG Li(), HU Wenying, LI Yingxin, ZHANG Enwei   

  1. Yunnan Normal University,Kunming 650500
  • Received:2019-06-12 Revised:2019-07-05 Online:2019-08-28 Published:2020-10-20

摘要:

植被覆盖度的动态监测是研究区域生态环境的重要部分,基于 Google Earth Engine遥感大数据云计算平台收集四川省2001—2016年Landsat TM/OLI的复合NDVI遥感影像,综合利用最大值合成法、像元二分模型、趋势分析等方法,估算2001—2016年的四川省植被覆盖度,并对16年的四川省植被覆盖度变化状况进行分析。结果表明:1)利用GEE强大的云计算能力可以对大面积研究区域进行长时序的动态监测;2)2001—2016年16年间,四川省的植被覆盖整体呈现比较良好的状况且植被覆盖变化趋势比较稳定;3)四川省植被覆盖度呈现空间分布不均的状况,大体呈现从边缘到中心覆盖度逐渐降低的趋势。16年间该地区的植被覆盖度整体呈现轻度增加的趋势,总体而言,四川省的植被覆盖状况良好。

关键词: 植被覆盖度, 像元二分模型, 时空变化, 动态监测

Abstract:

Dynamic monitoring of vegetation coverage is an important part of studying regional ecological environment.This article uses the Google Earth Engine remote sensing big data cloud computing platform to collect the composite NDVI remote sensing images of Landsat TM/OLI in Sichuan Province from 2001-2016,and make comprehensive use of the methods of maximum synthesis,pixel binary model and trend analysis to estimate the vegetation coverage in Sichuan Province from 2001 to 2016 and analyze the changes in vegetation coverage in Sichuan Province in the past 16 years .The results show that,firstly,GEE's powerful cloud computing capability can be used to dynamically monitoring long time series in large study areas.Secondly,from 2001 to 2016,the vegetation coverage in Sichuan Province showed a relatively good overall situation and the vegetation cover change trend was relatively stable.Thirdly,the vegetation coverage in Sichuan province presents uneven spatial distribution,and generally shows a trend of gradual decrease from the edge to the center.In the past 16 years,the vegetation coverage in this region has shown a slight increase trend.In general,the vegetation coverage in Sichuan province is in good condition.

Key words: vegetation coverage, pixel binary model, temporal and spatial change, dynamic monitoring

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