【摘要】 基于2014年、2019年两期Landsat 8遥感影像数据,选取NDVI、WET、NDSI、LST指标归一化处理,采用主成分分析法构建遥感生态指数RSEI,定量评估天津市生态用地的生态质量时空分布规律与5年变化特征。两期数据分析结果表明:天津市生态用地RSEI值处于中等水平,除湿地以外其他5种类型生态用地的RSEI值5年来均有所上升,全市16区有9个区RSEI值呈增长趋势,生态质量改善的区域主要分布于北大港湿地、尔王庄水库、七里海湿地、蓟州青甸洼和北部山区以及部分西北防风阻沙林带。更多还原

【Abstract】 Based on the Landsat 8 remote sensing image data in 2014 and 2019,the NDVI,WET,NDSI,and LST indicators were normalized,and the principal component analysis method was used to construct the remote sensing ecological index RSEI to quantitatively evaluate the temporal and spatial distribution of ecological quality of ecological land in Tianjin with five-year change characteristics.The results of the two-phase data analysis show that the ecological quality of Tianjin’s ecological land is at a medium level,and the RSEI of the five types of ecological land other than wetlands has increased over the past five years.The RSEI value of 9 districts in the 16 districts of the city is increasing. The areas with improved ecological quality are mainly distributed in Beidagang wetland,Erwangzhuang reservoir,Qilihai wetland,Jizhou Qingdian basin and northern mountainous areas,and part of the northwest windbreak sand forest belt.更多还原