沿海地区的长期红树林动态和安全:使用Landsat和Sentinel-2数据的基于远程传感的紧急分析
Wenyang Xu1, Muhammad Haseeb2, Xiangtian Zheng1
1Nanjing Institute of Technology, Nanjing, China.
Marine pollution bulletin
|October 15, 2025
概括
巴基斯坦的印度河三角洲和沙地区的红树林覆盖面从1988年到2024年大幅扩大,显示密度增加和生态恢复. 这一长期趋势凸显了红树林的性,并为沿海保护战略提供了洞察力.
科学领域:
- 沿海生态 沿海生态
- 遥感 遥感 遥感 遥感
- 环境监测 环境监测
背景情况:
- 红树林是重要的沿海生态系统,提供自然防御和关键息地.
- 了解长期红树林动态对于有效的沿海管理和保护至关重要.
- 巴基斯坦的印度河三角洲和沙地区面临着独特的环境压力,影响着红树林的健康.
研究的目的:
- 分析巴基斯坦的印度河三角洲和沙长期的红树林覆盖面和碎片化趋势.
- 用标准化差异植被指数 (NDVI) 值来评估红树林树冠密度的变化.
- 为了比较Landsat和Sentinel-2卫星数据对红树林监测的有效性.
主要方法:
- 利用Landsat图像 (1988-2024) 和Sentinel-2数据 (2019年,2024年) 来进行红树林的分类.
- 采用规范差异植被指数 (NDVI) 值来分类红树林树冠密度 (稀疏,中等,厚).
- 进行碎片化和过渡分析,并使用高分辨率图像进行准确性验证.
主要成果:
- 观察到大量的红树林扩张:印度河三角洲 (305.54平方公里到1002.82平方公里),沙 (10.22平方公里到15.64平方公里).
- 红树林的密集化表明,人们正在转向更健康,更密集的植被.
- 高分类精度 (>96%) 和卡帕值 (>0.93) 证实了数据的可靠性.
结论:
- 研究区域的红树林生态系统表现出显著的扩张和密集,表明生态恢复和弹性.
- 遥感数据,特别是Sentinel-2,提供了对红树林动态的可靠监测.
- 调查结果为政策提供重要数据,并加强对气候变化的沿海减缓和适应战略.
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