摘要
以2001、2008、2014和2018年Landsat系列遥感影像为基础,计算能反映生态环境质量的绿度(NDVI)、湿度(WET)、热度(LST)和干度(NDSI)4个指标,运用主成分分析方法确定各指标的权重并构建遥感生态指数(RSEI),以期对抚州市东乡区18年内的生态环境质量进行动态监管与测量,并根据现有数据对其变化原因进行分析研究。结果表明,2001—2018年,东乡区的生态环境质量变化显著,其2001、2008、2014和2018年遥感生态指数的均值分别为0.7168、0.6525、0.6825和0.6413。2001—2008年,东乡区生态环境质量整体变差;2008—2014年,东乡区生态环境质量变好的区域以及无明显变化的区域居于主导地位;2014—2018年整体的生态环境质量处于变差趋势,但变差的幅度不大,主要以略微变差为主。从空间分布上看,生态环境质量整体以良好、优秀为主,变差的区域主要集中在东乡区城区及西南城市扩张区,变好的区域则集中于东南部以及北部的丘陵、林地和林场。研究区的生态环境质量状况与植被覆盖状况、建设用地扩张以及人类生活关系密切,应加强孝岗镇及周边人口居住地区的生态环境保护,促进城市化发展与生态环境保护相协调。遥感生态指数可有效反应研究区生态环境质量,从而为研究区的生态保护以及抚州市生态文明建设提供合理的参考依据。
Based on the Landsat series of remote sensing images in 2001,2008,2014 and 2018,four indicators of greenness,humidity,heat and dryness are calculated that can reflect the quality of the ecological environment.Then,the principal component analysis method is used to determine the weight of each indicator and construct the remote sensing ecology Index(RSEI),and dynamic supervision and measurement of the ecological environment quality in Dongxiang district of Fuzhou city in 18 years,and finally,the reasons for its changes are analyzed and summerized based on existing data.The research results show that the ecological environment quality of Dongxiang district has changed significantly from 2001 to 2018,and the mean values of the remote sensing ecological index in 2001,2008,2014 and 2018 were 0.7168,0.6525,0.6825 and 0.6413,respectively.From 2001 to 2008,the overall ecological environment of Dongxiang district environmental quality has deteriorated.From 2008 to 2014,areas with better ecological environment quality in Dongxiang district of Fuzhou city and areas with no obvious changes were dominant.From 2014 to 2018,the overall ecological environment quality is in a trend of deterioration,but the extent of the deterioration is not large,mainly slightly worse.From the perspective of spatial distribution,the overall ecological environment quality is mainly good and excellent.The worsening areas are mainly concentrated in the urban area of Dongxiang district and the southwestern urban expansion area.The better areas are concentrated in the hills,woodlands and forest farms in the southeast and north.The quality of the ecological environment in the study area is closely related to vegetation coverage,expansion of construction land,and human life.The ecological environmental protection of Xiaogang town and the surrounding population living areas should be strengthened to promote the coordination of urbanization development and ecological environmental protection.The remote sensing ecological index can effectively reflect the ecological environment quality of the study area,so as to provide a reasonable reference for the ecological protection of the study area and for the construction of ecological civilization in Fuzhou.
作者
黄振兴
李满根
封志兵
陈念楠
刘颖
HUANG Zhen-xing;LI Man-gen;FENG Zhi-bing;CHEN Nian-nan;LIU Ying(School of Earth Science,East China University of Technology,Nanchang 330013,China)
出处
《东华理工大学学报（自然科学版）》
CAS
2022年第1期60-66,共7页
Journal of East China University of Technology(Natural Science)
基金
中核集团龙灿工程科研项目(地LCEQ01)
东华理工大学核资源与环境国家重点实验室自主基金项目(2020Z13)
江西省自然科学基金项目(20202BAB213017)。
关键词
遥感生态指数
生态环境评价
主成分分析
东乡区
remote sensing ecological index
ecological environment assessment
principal component analysis
Dongxiang district
