在谷歌地球引擎中监测湿地的时空变化,使用协调的图像系列来监测湿地
1Harita Mühendisliği Bölümü, Mühendislik Fakültesi, Aksaray Üniversitesi, 68100, Aksaray, Türkiye. egurbuz@aksaray.edu.tr.
Environmental monitoring and assessment
|May 30, 2023
概括
使用谷歌地球引擎的遥感显示了阿克谢希尔湖.
科学领域:
- 环境科学 环境科学
- 遥感 遥感 遥感 遥感
- 地理空间分析的研究.
背景情况:
- 监测湖泊和湿地动态对于了解环境变化至关重要.
- 传统的遥感研究往往忽略了关键的变化,专注于特定的时间段.
- 来自传统方法的有限数据可能会阻碍有效的水资源管理.
研究的目的:
- 使用谷歌地球引擎 (GEE) 评估阿克谢希尔湖的面积变化.
- 展示一种快速而实用的方法来分析大规模的时间遥感数据.
- 为水资源管理研究提供不间断的数据.
主要方法:
- 使用了Landsat 5TM,7 ETM+和8个OLI/TIRS卫星图像从1985年到2020年.
- 在谷歌地球引擎平台中创建了卫星图像的协调年度马赛克.
- 应用了规范差水指数 (NDWI) 和自动取水指数 (AWEI) 来评估水面积变化.
主要成果:
- 阿克谢希尔湖在1985年至2020年期间平均减少了87%的水面积.
- 根据NDWI的计算,水面积下降了91%,而AWEI显示水面积下降了83%.
- GEE的方法使得使用所有可用的图像进行快速和实际的评估,避免数据缺口.
结论:
- GEE平台提供了一个节省时间和劳动力的解决方案,用于分析水体的长期变化.
- 与传统的,特定时期的分析相比,这种方法提供了更全面和不间断的数据.
- 这些发现突显了阿克谢希尔湖的严重收缩,强调了需要水资源管理战略的必要性.
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