基于多时相RSEI的生态环境质量评价——以新民市为例  

Eco-environmental quality evaluation based on multi-temporal RSEI:A case study in Xinmin City

作　　者：王井利[1] 余鹏程 蔡福[2] 刘慧楠 高天娇 WANG Jing-li;YU Peng-cheng;CAI Fu;LIU Hui-nan;GAO Tian-jiao(Shenyang Jianzhu University,Shengyang 110168,China;Institute of Atmospheric Environment,China Meteorological Administration,Shengyang 110166,China)

机构地区：[1]沈阳建筑大学,沈阳110168 [2]中国气象局沈阳大气环境研究所,沈阳110166

出　　处：《湖北农业科学》2024年第4期56-60,共5页Hubei Agricultural Sciences

基　　金：中国气象局沈阳大气环境研究所联合开放基金项目(2021SYIAEKFZD05);国家重点研发计划项目(2017YFD0301704;2016YFD0300307);公益性行业科研专项(20150312705)。

摘　　要：以辽宁省新民市作为研究对象,基于2014年、2017年、2020年的相近月份(5—6月)Landsat 8 OLI_TRIS数据,提取4个生态因子[绿度(NDVI)、湿度(WET)、干度(NDBSI)、热度(LST)],采用主成分分析法构建遥感生态指数(RSEI),对研究区域生态环境质量时空演变特征进行评价。结果表明,2014年、2017年、2020年新民市RSEI的均值分别为0.397、0.348、0.506,呈先降后升的趋势。2014—2020年,生态环境质量等级为差和较差的区域主要分布在西北区域,面积占比由62.5%降至33.2%;生态环境质量等级为较好和好的区域主要分布在东南区域,面积占比呈明显的先降低后升高趋势,由21.3%先下降到18.4%后上升到37.0%。4个因子中绿度和湿度对生态环境质量起到正面作用,其中湿度的正面影响较为显著;干度和热度起到负面作用,其中干度的负影响较为显著。Taking Xinmin City of Liaoning Province as the research object,based on the Landsat 8 OLI_TRIS data of similar months(May to June)in 2014,2017 and 2020,four ecological factors[greenness(NDVI),humidity(WET),dryness(NDBSI),heat(LST)]were extracted,and the remote sensing ecological index(RSEI)was constructed by principal component analysis to evaluate the spatial and temporal evolution characteristics of eco-environment quality in the study area.The results showed that the regional mean values of RSEI in Xinmin City in 2014,2017 and 2020 were 0.397,0.348 and 0.506 respectively,showing a trend of first de⁃creasing and then increasing.From 2014 to 2020,the areas with poor eco-environmental quality and relatively poor eco-environmen⁃tal quality were mainly distributed in the northwest region,and the area ratio decreased from 62.5%to 33.2%.The areas with relatively good eco-environmental quality and good eco-environmental quality were mainly distributed in the southeast,and the proportion of ar⁃ea showed an obvious trend of first decreasing and then increasing,from 21.3%to 18.4%and then rising to 37.0%.Among the four fac⁃tors,greenness and humidity played a positive role in the quality of eco-enviroment,and the positive effect of humidity was generally more significant;dryness and heat played a negative role,and the negative effect of dryness was more significant.

关 键 词：生态环境质量 Landsat8 OLI_TRIS 遥感生态指数(RSEI) 主成分分析 新民市 

分 类 号：X826[环境科学与工程—环境工程] TP79[自动化与计算机技术—检测技术与自动化装置]