摘要
利用遥感影像来提取与生态环境密切相关的指标,通过主成分分析及逐像元算法计算研究区遥感生态指数,同时采用标准差椭圆,并结合土地利用信息,揭示长三角地区生态环境质量空间特征以及与土地利用间的关系,结果表明:①2004—2020年长三角地区以中等和良好的生态环境状况为主,整体生态变差的区域有所减少。②从标准差椭圆转变发现,各省份生态扩展的主方向未发生较大变化,但有各自发展趋势。③研究区土地利用类型主要为耕地。生态空间用地变化中,“半生态用地→弱生态用地”占比最大。④生态质量较好的区域位于生态用地,而处于建设用地的生态环境偏差。
In this paper,based on remote sensing images,we principal component analysis and pixel by pixel algorithm tocalculatedremote sensing ecological indicators(RSEI).Combining with land-use information,we used the standard deviation ellipse to reveal the spatial characteristics of ecological environment quality and the relationship with ecological land in Yangtze River Delta.The results show that①from 2004 to 2020,the Yangtze River Delta region is dominated by medium and good ecological environment conditions,with a decreasing in the overall ecological deterioration area.②From the ellipse of standard deviation,it is found that the main direction of ecological expansion in each province has not changed significantly,but their own development trends are obvious.③The land-use type in the study area is mainly arable land.Among the changes of ecological space land-use,“semi-ecological land to weak ecological land”accounted for the largest proportion.④The area with better ecological quality is located in the ecological land,and the ecological environment deviation of the construction land is located.
作者
何孟琦
汪承平
海燕
郑舒元
王建雄
HE Mengqi;WANG Chengping;HAI Yan;ZHENG Shuyuan;WANG Jianxiong(Research Center of Agricultural Remote Sensing and Precision Agriculture Engineering in Yunnan Universities,Kunming 650201,China;College ofWater Conservancy,Yunnan Agricultural University,Kunming 650201,China)
出处
《地理空间信息》
2023年第8期95-99,共5页
Geospatial Information
基金
云南省教育厅科学研究基金研究生项目(2022Y285)。