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了解城市土地系统空间时间变化与印度斯里纳加市土地表面温度之间的联系,使用谷歌地球引擎的图像档案
Khalid Omar Murtaza1, Shahid Shafai1, Pirzada Shahid1
1Department of Geoinformatics, University of Kashmir, Hazratbal, Srinagar, India.
概括
斯里纳加市的快速城市化导致陆地表面温度 (LST) 和城市热岛 (UHI) 效应显著增加. 这项研究将土地利用变化与气温上升联系在一起,影响城市环境.
科学领域:
- 环境科学 环境科学
- 遥感 遥感 遥感 遥感
- 城市规划 城市规划
背景情况:
- 土地利用和土地覆盖 (LULC) 变化对自然资源和生态系统服务产生重大影响.
- 城市化是LULC变化的关键驱动力,通常会导致土地表面温度 (LST) 升高,导致城市热岛 (UHI) 效应.
研究的目的:
- 分析1992年至2020年斯里纳加市LULC动态和LST之间的联系.
- 研究LST,UHI和生物物理指数 (NDVI,NDWI) 之间的关系.
主要方法:
- 利用了Landsat卫星图像 (1992-2020) 的时间序列.
- 使用谷歌地球引擎 (GEE) 进行LST导出和LULC变化检测.
- 分析了规范差异植被指数 (NDVI) 和规范差异水指数 (NDWI).
主要成果:
- 斯里纳格的建筑面积从12% (1992年) 增加到40% (2020年).
- 水体从6%减少到4%,种植园从26%减少到17%,森林从4%减少到2%.
- 在1992年至2020年期间,最大LST增加了11°C,最小LST增加了5°C,UHI效应明显.
结论:
- 斯里那加的城市扩张已经耗尽了自然的土地覆盖面和绿色/蓝色空间.
- 显著的LST上升和UHI效应是LULC变化的直接后果.
- 调查结果为可持续的城市环境管理策略提供了关键知识.
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