基于改进遥感生态指数的东港市生态环境变化分析  

Analysis of Ecological Environment Changes Based on Improving Remote Sensing Ecological Index in Donggang City

作　　者：张欣[1] 卫亚星[1] Zhang Xin;Wei Yaxing(College of Geographical Sciences,Liaoning Normal University,Dalian,Liaoning 116029,China)

机构地区：[1]辽宁师范大学地理科学学院,辽宁大连116029

出　　处：《绿色科技》2023年第4期220-225,共6页Journal of Green Science and Technology

摘　　要：区域生态环境变化与土地利用和景观格局的变化有着直接的关系。以东港市为研究对象,选取1998~2018年Landsat影像作为数据源,通过耦合影像反演得到的绿度、湿度、干度、热度4个因子,构建改进的遥感生态指数对东港市1998~2018年生态环境质量进行了评价。同时借助景观格局指数揭示这20年间景观格局演变特征,研究了东港市土地利用类型的变化对东港市生态环境质量的影响。结果表明:①3个时期东港市RSEI均值先上升后下降,但生态环境质量总体上有所改善。生态环境质量以优良等级为主,变差的部分主要位于东港市的西北部、东北部和东南部;②景观指数分析表明,这20年间东港市的景观异质性增强,破碎化程度增高;③近20年东港市土地利用类型变化与生态环境质量变化的空间分布基本吻合,耕地、林地、草地的RSEI均值较高。The change of regional ecological environment is directly related to the change of land use types and landscape patterns.Taking Donggang City as the study area,the Landsat images from 1998 to 2018 are used as the data source,and the improved RSEI was constructed through coupling four ecological indexes of greenness,humidity,dryness and heat of the Landsat images to evaluate the ecological environment quality of Donggang City.At the same time,the landscape pattern index in the three periods reveals the landscape pattern evolution characteristics.Finally,the influence of the change of land use types in Donggang City on the regional ecological environment quality is studied.The results show that:①The average RSEI value in Donggang City rose first and then decreased,but the overall ecological environment quality has been improved.The ecological environment quality is mainly excellent and good,and the area of deterioration is mainly located in the northwest,northeast and southeast of Donggang City;②The landscape pattern index showed that the landscape heterogeneity is enhanced and fragmentation of Donggang City increased in the past 20 years;③In the past 20 years,the spatial distribution of land use types in Donggang City is basically consistent with the change of ecological environment quality,and the average RSEI of farmland,forest land and grassland is relatively high.

关 键 词：遥感生态指数(RSEI) 景观格局指数 生态环境变化 土地利用变化 

分 类 号：X826[环境科学与工程—环境工程]