基于Landsat 8遥感影像的福州市区公园降温效应分析

Analysis of the cooling effect of Fuzhou City park based on Landsat 8 image

福州市是全国“城市双修”第二批试点城市之一,研究市区公园生态修复成效具有重要意义。本次研究选用2019年9月26日Landsat 8影像反演福州市区地表温度,选取10个具有代表性的公园,利用地理信息系统技术设置缓冲区,从降温范围、降温幅度、降温速率共3个方面定性与定量分析福州市区公园降温效应。研究成果表明,福州市市区公园仍有提升降温效应的空间,当公园面积维持在60 hm 2内,水体比例少于30%,建设用地比例不超过30%,尽量提高铺装透水性与绿地面积时,公园降温效应与土地利用率能达到最佳。

Fuzhou City is one of the second batch of pilot cities of“Urban Double Repair”in China,and it is of great significance to study the ecological restoration effect of urban parks.This study selected Landsat 8 images on September 26,2019 to reflect the surface temperature in Fuzhou City,from which 10 representative parks were selected.Using GIS technology to set up buffer zones,from the cooling range,cooling range,cooling rate of three aspects of qualitative and quantitative analysis of Fuzhou urban park cooling effect.The research results show that there is still room for improvement of cooling effect in urban park in Fuzhou City.When the park area is maintained in 60 hm 2 while the proportion of water bodies is less than 30%and the proportion of construction land is not more than 30%,as far as possible to improve the permeability of paved water and green space,the park cooling effect and land utilization rate can approach the best.