基于Landsat和MODIS时间序列数据的黄河三角洲植被覆盖变化的时间和空间分析
Songfei Wei1, Yao Dong1, Yuxin Qiu1
1School of Information Science and Engineering, Shandong Agricultural University, Tai'an, 271018, China.
Environmental monitoring and assessment
|August 17, 2023
概括
黄河三角洲的植被覆盖在2000-2020年间波动,最初增加,然后减少. 稳定的植被集中在黄河附近,与它的邻近有很强的相关性.
科学领域:
- 遥感 遥感 遥感 遥感
- 环境科学 环境科学
- 生态生态学 生态生态学
背景情况:
- 植被覆盖的动态对于生态系统健康和土地管理至关重要.
- 黄河三角洲是经历环境变化的敏感地区.
研究的目的:
- 分析2000年至2020年黄河三角洲植被覆盖的时间和空间变化.
- 了解植被分布和黄河之间的关系.
主要方法:
- 来自Landsat和MODIS规范差异植被指数 (NDVI) 数据的合成时间序列图像.
- 采用随机森林算法进行分类和GIS空间分析.
- 根据时间序列特征选择的特征.
主要成果:
- 植被覆盖面最初增加,随后在2000-2020年间下降,土地覆盖面变化动态普遍较低.
- 2010年以后的月平均最低NDVI值较高,而2010年以后的最大值较高.
- 植被占研究面积的31.54%,63.90%是固定植被,主要分布在黄河附近的辐射分布.
结论:
- 黄河三角洲的植被分布受到黄河的强烈影响,附近集中了稳定的地区.
- 辐射分布模式和流域外的碎片化突出了河流对植被生长的重大影响.
- 高负相关性 (-0.9964) 证实了黄河在植被模式中的关键作用.
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