调查城市动态和环境因素在不丹廷普的相互作用:一个卫星遥感方法
Indra Bahadur Chhetri1, Sangay Gyeltshen2,3, Kelzang Dema2,4
1Department of Civil Engineering and Surveying, Jigme Namgyel Engineering College, Royal University of Bhutan, Dewathang, Bhutan. indrachhetri.jnec@rub.edu.bt.
Environmental monitoring and assessment
|July 6, 2024
概括
城市化对土壤表面温度 (LST) 和Bhutan的Thimphu的正常差异植被指数 (NDVI) 产生了重大影响. 土地利用变化推动了这些环境转变,影响了生态过程和城市发展.
科学领域:
- 环境科学 环境科学
- 遥感 遥感 遥感 遥感
- 城市气候学 城市气候学
背景情况:
- 土地表面温度 (LST) 和正常化差异植被指数 (NDVI) 是土地表面变化的关键指标和重要的气候变量.
- 城市化对环境的影响,特别是在像不丹的Thimphu山谷这样的复杂地形上,需要进行系统的调查.
- 之前的研究还没有全面研究城市化对该特定地区环境变量的影响.
研究的目的:
- 调查土地使用/土地覆盖 (LULC) 动态对2000年至2020年不丹的Thimphu LST,NDVI和海拔的影响.
- 分析LST,NDVI和不同LULC类型的高度之间的关系.
- 评估中等空间分辨率卫星图像对监测城市发展影响的有用性.
主要方法:
- 利用了2000年至2020年的中等分辨率成像光谱辐射仪 (MODIS) 数据,用于不丹的廷.
- 分析了土地表面温度 (LST) 和与土地使用/土地覆盖 (LULC) 和海拔相对应的正常化差异植被指数 (NDVI).
- 研究了时空模式和环境变量与LULC变化之间的相关性.
主要成果:
- 在LULC类型中,LST的差异很大,在建成地区最高,在森林中最低.
- 在建成地区观察到LST和NDVI之间存在强烈的负线性相关性,表明人为影响.
- 高度显著影响了LST和NDVI,在较低的海拔上发现了相反的模式.
结论:
- 显然,LULC的动态影响着LST和NDVI,强调需要了解时空模式,以便有效地管理和保护土地.
- 这项研究证实了成本效益高的卫星图像对于评估城市发展对环境的影响的适用性.
- 结果为Thimphu谷和类似地区的可持续城市规划和环境监测提供了关键的见解.
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