摘要
利用卫星数据分析生态环境及城镇化发展的研究较多,不同地区的结果差异较大。佛山市作为典型快速城市化区域,目前经济发展对其生态环境的影响研究较少。文章基于DMSP-OLS和NPP-VIIRS两种数据,通过模型拟合得到佛山1992—2019年夜间灯光数据集,分析佛山夜间灯光指数及城市建成区的时空变化特征,并进一步研究夜间灯光指数与植被指数的关系。结果表明:28年来,佛山夜间灯光指数持续增加,年平均增速为3.3%,与年平均GDP呈指数方式显著相关。佛山城市建成区面积增加约2.6倍,城市扩张现象显著。2000—2019年,佛山年平均NDVI显著增加,NDVI与夜间灯光指数在时间上呈二次多项式关系变化,在空间上正负相关性并存,具有显著正相关关系的像元占52.3%。研究表明,佛山城市高速发展的同时,生态环境得到了很好的保护。
There are many studies using satellite data to analyze the ecological environment and urbanization development,and the results of different regions vary greatly.As a typical rapidly urbanized region,there is little research on the impact of economic development on the ecological environment of Foshan city.In this paper,the nighttime light dataset of Foshan from 1992 to 2019 was obtained by establishing the fitting model of the DMSP-OLS and the NPP-VIIRS data,then the spatial and temporal characteristics of the nighttime light index and the urban built-up area were analyzed.Meanwhile,the relationship between the nighttime light index and the NDVI was studied.The results suggested that,the average nighttime light index continued to increase in the past 28 years,with an annual growth rate of 3.3%.The phenomenon of urbanization expansion in Foshan was obvious and the urban built-up area has increased by nearly 2.6 times.During this period,the NDVI and the nighttime light index changed in a quadratic polynomial relationship.Both the positive and negative correlations existed between the NDVI and the nighttime light index.Among them,the area of pixels with significant positive correlation accounted for 52.3%.The research indicated that the ecological environment was well protected along with the Foshan’s rapid urbanization.
作者
王娟敏
谭浩波
邓玉娇
杜尧东
史丽
WANG Juanmin;TAN Haobo;DENG Yujiao;DU Yaodong;SHI Li(Guangdong Province Climate Center,Guangzhou 510640,China;Guangdong Meterorological Service,Guangzhou 528000,China;Guangdong Ecological Meteorology Center,Guangzhou 510640,China)
出处
《遥感信息》
CSCD
北大核心
2023年第4期24-32,共9页
Remote Sensing Information
基金
广东省自然科学基金青年项目(2020A1515110423)
广东省气象局面上项目(GRMC2022M05)。
关键词
夜间灯光指数
植被指数
时空变化
相关关系
佛山市
nighttime light index
NDVI
temporal and spatial change
correlation
Foshan city
