基于RS和GIS的植被覆盖变化和生态效应评估——以合肥市为例

Assessment of Vegetation Cover Change and Ecological Effects Based on RS and GIS——A Case Study of Hefei City

以合肥市为例,基于RS与GIS技术,通过采用2008年、2013年以及2018年的3幅遥感影像,监测2008-2018年合肥市的植被覆盖度变化以及对其生态效应进行评估与探讨。结果表明:合肥市植被覆盖度在10年间呈下降到稳定的趋势,空间分布由集中向周边发散;生态环境质量在10年的时间里经历了缓慢改善的过程,空间上逐渐碎片化发展;遥感生态指数和植被覆盖度在空间上呈正相关。研究结果为城市发展的合理规划和生态环境的改善提供重要的参考价值。

In recent years, ecological issues have attracted much attention. Taking Hefei City as an example, based on RS and GIS technology, three remote sensing images from 2008, 2013 and 2018 are used to monitor the changes in vegetation coverage in Hefei City from 2008 to 2018 and to evaluate and explore the ecological effects in the past decade. The results show that: The vegetation coverage of Hefei City has declined to a stable trend in 10 years, and the spatial distribution diverges from concentration area to the surrounding area;The ecological environment quality has experienced a 10-years increase and gradually-fragmented spatial development. There is a positive spatial correlation between the remote sensing ecological index and vegetation coverage. The research results provide important reference value for the government’s rational planning of urban development and the improvement of the ecological environment.